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Archives of Environmental Health

Our medical research library holds 59 studies published in Archives of Environmental Health (1960–2004). Each entry links to the study's record on PubMed and, where there is one, to the publisher's page and a free full text. 29 have an abstract, the authors' own summary as PubMed records it: open "Abstract" to read it. For 7 studies PubMed has no abstract for, we give the abstract printed in the article or, where there is none, a summary we wrote from it, each labeled as such.

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2000s

  • Asbestos exposure and cancer mortality among petroleum refinery workers: a Poisson regression analysis of updated data. F. Montanaro, M. Ceppi, R. Puntoni, et al. 2004;59(4):188-93. PubMed · Publisher

    Abstract

    The authors investigated the relationship between asbestos exposure and respiratory cancer mortality among maintenance workers and other blue-collar workers at an Italian oil refinery. The cohort contained 931 men, 29,511 person-years, and 489 deaths. Poisson regression analysis using white-collar workers as an internal referent group provided relative risk estimates (RRs) for main causes of death, adjusted for age, age at hiring, calendar period, length of exposure, and latency. Among maintenance workers, RRs for all tumors (RR = 1.50), digestive system cancers (RR = 1.41), lung cancers (RR = 1.53), and nonmalignant respiratory diseases (RR = 1.71) were significantly increased (p < 0.05); no significant excess was found for all causes and among maintenance (RR = 1.12) and other blue-collar workers (RR = 1.01). Results confirm the increased risk of death from respiratory diseases and cancer among maintenance workers exposed to asbestos, whereas other smoking-related diseases (circulatory system) were not statistically different among groups.

  • Assessment of environmental and domestic exposure to tremolite in New Caledonia. D. Luce, M.A. Billon-Galland, I. Bugel, et al. 2004;59(2):91-100. PubMed · Publisher

    Abstract

    In this study, the authors characterized exposure to asbestos in the population of New Caledonia, an area where a high mesothelioma incidence was found to be associated with the use of a tremolite-containing whitewash on dwellings. The authors collected airborne samples from various sources. Lung tissue samples or bronchoalveolar lavage fluids were available for 80 subjects, who were interviewed regarding their residential and occupational histories. The authors analyzed all samples by analytical transmission electron microscopy. Results indicated that the use of the tremolite-based whitewash may generate high airborne fiber levels and result in asbestos lung contents comparable with those observed in occupational settings. The highest airborne tremolite concentrations were reached during sweeping in whitewashed houses. Lung concentrations of tremolite fibers were significantly higher in subjects exposed to the whitewash than in unexposed subjects, and the concentrations increased with the duration of exposure.

  • Determination of environmental exposure to asbestos (tremolite) and mesothelioma risks in the southeastern region of Turkey. A. Senyigit, A. Dalgic, O. Kavak, et al. 2004;59(12):658-62. PubMed · Publisher

    Abstract

    In this study, the authors examined the concentrations and mineralogical analyses of asbestos, and investigated mesothelioma risk in southeastern Anatolia, Turkey. They used a gravimetric dust sampler to collect samples from 2 villages and 2 asbestos mines (1 active). Samples were then evaluated by an X-ray diffractometer and an electron microscope. The authors found high concentrations of asbestos in an active mine (4.9 fibers[f]/cm3) and at a house that was plastered with asbestos (1.24 f/cm3) and had a very active population. They found a low concentration (0.0042 f/cm3) in indoor measurements taken in Armutova village, and an even lower concentration (0.000081 f/cm3) in the inactive mine environment. Outdoor measurements included a low concentration of 0.007 f/cm3 in the village environment, and a high concentration of 1.17 f/cm3 on the mine road during the passing of a sheep herd. The people in the region are continuously exposed to asbestos during normal activities. This cumulative exposure to asbestos carries sufficient risks for mesothelioma development.

  • Asbestos exposure and antineutrophil cytoplasmic Antibody (ANCA) positivity. D. Pelclová, J. Bartůnková, Z. Fenclová, et al. 2003;58(10):662-8. PubMed · Publisher

    Abstract

    The authors used indirect immunofluorescence to examine the association of antineutrophil cytoplasmic antibodies (ANCAs) with exposure to asbestos among 61 asbestos-exposed patients (mean exposure = 24.6 yr) and 39 nonexposed controls. ANCA positivity was detected significantly more frequently (p = 0.034) in the asbestos-exposed group (21.3%) than in the control group (5.1%). ANCA-associated diseases did not occur more frequently among subjects exposed previously to asbestos than among unexposed controls. These findings confirmed that exposure to asbestos is another occupational factor, as is silica exposure, that is associated with ANCA positivity. The influence of asbestos appears stronger than that of silica because ANCA positivity was found among subjects who had histories of exposure to asbestos but who did not exhibit typical radiographic signs of asbestosis on their chest x-rays. Additional stimuli may be necessary to induce systemic vasculitis in asbestos-exposed persons.

  • Environmental exposure to asbestos in eastern Turkey. H.C. Hasanoğlu, M. Gokirmak, T. Baysal, et al. 2003;58(3):144-50. PubMed · Publisher

    Abstract

    In this study, the authors investigated the prevalence of asbestos-related disorders among the inhabitants of Güzelyurt, a town in Malatya, located in eastern Turkey. The authors examined river bed, white soil, and stucco samples taken from various locales in Güzelyurt, and they confirmed the presence of tremolite and chrysotile asbestos fibers. Subjects (N = 920; 449 males and 471 females) were examined by photofluoroscopy. Eighty-five patients (9.2%) had asbestos-related radiological findings; risk increased with age. Calcified pleural plaques were seen more frequently in individuals > or = 50 yr of age, compared with younger subjects (p < 0.01). Asbestos-related disorders were prevalent in the inhabitants of Güzelyurt, the population of which is exposed environmentally to asbestos--primarily the result of the stuccoing and whitewashing of houses with soil that contains asbestos.

  • Pleural mesothelioma cases in Biancavilla are related to a new fluoro-edenite fibrous amphibole. P. Comba, A. Gianfagna, L. Paoletti. 2003;58(4):229-32. PubMed · Publisher

    Abstract

    A cluster of deaths from pleural mesothelioma was previously reported for Biancavilla, Italy, a city in eastern Sicily. An environmental survey suggested that the stone quarries located southeast of the city might be a source of asbestos exposure. The materials extracted from the quarries, used widely in the local building industry, contain large quantities of a fibrous amphibole that was initially referred to as an anomalous intermediate phase of sodium- and fluorine-rich tremolite-actinolite. A subsequent crystal chemistry investigation identified the mineral as fluoro-edenite, a new end-member of the edenite --> fluoro-edenite series. The material is very similar in morphology and composition to the minerals of the tremolite-actinolite series. To the authors' knowledge, fluoro-edenite becomes the 3rd mineral fiber (along with erionite and winchite), not yet classified as asbestos, with a demonstrable mesotheliomatogenous action in humans.

  • High prevalence of reversible airway obstruction in asbestos-exposed workers. S. Delpierre, M.J. Delvolgo-Gori, M. Faucher, et al. 2002;57(5):441-5. PubMed · Publisher

    Abstract

    In this retrospective study of 97 male workers exposed to asbestos for 2-50 yr, data were collected on chest x-ray findings and lung function, including lung volumes, forced expiratory flow rates (i.e., forced expiratory volume in 1 sec [FEV1.0], forced expiratory flow measured between 25% and 75% of forced vital capacity [FEF(25-75%)]), airway resistance (R(aw)), carbon monoxide (CO)-diffusing capacity, and the existence of airway obstruction reversible by a beta-adrenergic agonist (RAO). The authors performed multiple-regression analyses to correlate the variations in lung function data with age, smoking habits, duration of asbestos exposure, and time since last exposure. Occupational activities of subjects that might induce specific lung abnormalities were also considered. No significant decrease was seen in lung volumes or CO-diffusing capacity; however, a decrease in FEV1.0 and an increase in R(aw) were measured in 65% of the subjects, and an isolated decrease in FEF(25-75%) occurred in only 18%. There was no difference in lung-function data between subjects who had chest x-ray signs of abnormalities (n = 59) and those who did not (n = 38). A significant relationship was found between the decrease in FEV1.0 and age; however, no correlation was noted between altered lung function and cigarette smoking, duration of asbestos exposure, or time since last exposure. RAO prevalence was higher (34%) than previously reported (9%) in subjects with chronic obstructive pulmonary disease (COPD) who were not exposed to asbestos or outdoor pollution. The RAO prevalence in asbestos-exposed workers was nearly the same as that measured in COPD subjects who lived downtown and who were exposed to outdoor pollution (36%). The high RAO prevalence in asbestos-exposed workers was found in 43% of subjects who were exposed only to asbestos, and in 33% of subjects who were also exposed to air pollution due to their occupational activities. It is hoped that the observations in this study will encourage practitioners to check for RAO in asbestos workers who use inhaled bronchodilators.

  • Lung mineral fibers of former miners and millers from Thetford-Mines and asbestos regions: a comparative study of fiber concentration and dimension. A. Nayebzadeh, A. Dufresne, B. Case, et al. 2001;56(1):65-76. PubMed · Publisher

    Abstract

    Fiber dimension and concentration may vary substantially between two necropsy populations of former chrysotile miners and millers of Thetford-Mines and Asbestos regions. This possibility could explain, at least in part, the higher incidence of respiratory diseases among workers from Thetford-Mines than among workers from the Asbestos region. The authors used a transmission electron microscope, equipped with an x-ray energy-dispersive spectrometer, to analyze lung mineral fibers of 86 subjects from the two mining regions and to classify fiber sizes into three categories. The most consistent difference was the higher concentration of tremolite in lung tissues of workers from Thetford-Mines, compared with workers from the Asbestos region. Amosite and crocidolite were also detected in lung tissues of several workers from the Asbestos region. No consistent and biologically important difference was found for fiber dimension; therefore, fiber dimension does not seem to be a factor that accounts for the difference in incidence of respiratory diseases between the two groups. The greater incidence of respiratory diseases among workers of Thetford-Mines can be explained by the fact that they had greater exposure to fibers than did workers at the Asbestos region. Among the mineral fibers studied, retention of tremolite fibers was most apparent.

  • Malignant mesothelioma in Japan: analysis of registered autopsy cases. Y. Murai. 2001;56(1):84-8. PubMed · Publisher

    Abstract

    In the Annual of the Pathological Autopsy Cases in Japan, issued by the Japanese Society of Pathology from 1958 to 1996, a total of 1,846 (0.17%) malignant mesothelioma cases (1,287 male, 558 female, 1 unknown) were registered among 1,056,259 autopsy cases. The frequency of mesothelioma (number of cases/total autopsy cases) was 0.10% (461/440,334) for the term 1958-1979, 0.18% (716/390,124) for 1980-1989, and 0.30% (669/225,801) for 1990-1996; the frequency of cases increased significantly over the time periods (p < .0001). Among 1,785 cases for which tumor sites were ascertained, there were 1,213 pleural mesothelioma (68.0%), 431 peritoneal (24.1%), 108 pericardial (6.1%), 6 tunica vaginalis testis (0.3%), and 28 "others" (1.6%). Histological cell type was noted in 598 cases; 245 (41.0%) were epithelial, 168 (28.1%) were biphasic, and 185 (30.9%) were sarcomatous. Seventy-three (0.007%) cases of malignant mesothelioma with asbestosis were found during the entire 39-y period. The frequency of those with asbestosis (number of cases/total autopsy cases) was 0.001% (5/440,334) for the term 1958-1979, 0.006% (27/390,124) for 1980-1989, and 0.018% (41/225,801) for 1990-1996; this increase over time was statistically significant (p < .0001). Researchers expect that cases of asbestos-related mesothelioma will increase in Japan in the future. Tumor sites and histological cell types of mesothelioma with asbestosis did not differ from those in individuals without asbestosis.

  • Autopsy cases of asbestosis in Japan: a statistical analysis on registered cases. Y. Murai, M. Kitagawa. 2000;55(6):447-52. PubMed · Publisher

    Abstract

    There are 525 (484 male, 38 female, 3 unknown) autopsy cases with asbestosis registered in the Annual of the Pathological Autopsy Cases in Japan, which is issued by the Japanese Society of Pathology for the years 1958-1996. The frequency of asbestosis (number of cases/total autopsy cases) was 0.017% (76/440,334) for the 1958-1979 time period, 0.058% (226/390,124) for 1980-1989, and 0.099% (223/225,801) for 1990-1996. There was a significant increase in asbestosis cases across the three time periods (p < .0001). The number of asbestosis cases increased markedly among individuals who worked with asbestos products, as well as among those employed in asbestos-processing factories. The frequency of malignant tumors associated with asbestosis was 61.0% (320/525), and the frequency also increased across the three time periods, from 43.4% (33/76) to 62.8% (142/226) and 65.0% (145/223), respectively. Among the 525 cases with asbestosis, there were 174 lung cancers (33.1%), 73 malignant mesotheliomas (13.9%), 29 stomach cancers (5.5%), 14 liver cancers (2.7%), 9 prostatic cancers (1.7%), 8 malignant lymphomas (1.5%), 6 laryngeal cancers (1.1%), 4 pancreas cancers (0.8%), 3 rectal cancers (0.6%), and 28 other cancers (5.3%). The frequencies of lung cancer, malignant mesothelioma, and laryngeal cancer were significantly higher in the cases with asbestosis than among the nonasbestosis cases. The number of malignant tumors related to asbestos exposure is expected to increase in the future.

  • Corruption of previously published asbestos research. D.S. Egilman, A. Reinert. 2000;55(1):75-6. Historical article · Letter PubMed · Publisher

    Summary

    In this letter to the editor, the authors set out to correct the record on a mortality study of Quebec asbestos miners by Braun and Truan, published in 1958 in the predecessor of the Archives of Environmental Health. The Quebec Asbestos Mining Association, an industry trade group, had asked the Industrial Hygiene Foundation to carry out the study. The authors reported that a 1957 draft found a statistically significant excess of lung cancer associated with asbestosis, but the published version concluded the opposite. They quoted a letter from Dr. Kenneth Smith, medical director of Johns-Manville, noting the deletion of all references to the association of asbestosis and lung cancer. The authors stated that the published study included workers without asbestosis in the study group and used Quebec provincial lung cancer rates rather than rates from the eight counties surrounding the mines. Using rates from those counties, they recalculated the data. They found 9 lung cancers among 5,923 exposed workers (relative risk 2.55, p = .00341). Among 3,546 Thetford miners without asbestosis, 5 developed lung cancer between 1950 and 1955 (relative risk 2.55, p = .038). They noted that asbestosis may have been underdiagnosed in this population. The authors concluded that the study had little impact on the medical literature but continued to be used in litigation to argue that the asbestos-lung cancer link was unclear as late as 1960.

    PubMed has no abstract for this study, and the article doesn't print one. We wrote this summary from the full article with the help of AI. It is not the authors' wording.

  • Prevalence and features of advanced asbestosis (ILO profusion scores above 2/2). International Labour Office. K.H. Kilburn. 2000;55(2):104-8. PubMed · Publisher

    Abstract

    In this study, the author addressed the following question: Do workers with advanced asbestosis have a restrictive pulmonary physiology, and, alternately, do those who have restrictive physiological tests have advanced asbestosis? One group was identified by obvious radiographic measurements, and the other group was defined via physiologic measurements. Total lung capacity, vital capacity, and flows were measured in 12,856 men exposed to asbestos, of whom 3,445 had radiographic signs of asbestosis, as defined by the International Labour Office criteria. Radiographically advanced asbestosis-International Labour Office criteria profusion greater than 2/2 was present in 85 (2.5%) of men. An additional 52 men had physiologically restrictive disease. The author, who compared pulmonary flows and volumes of these two groups, used mean percentage predicted, adjusted for height, age, and duration of cigarette smoking. Men with radiographically advanced asbestosis had normal total lung capacity (i.e., 105.5% predicted), reduced forced vital capacities (i.e., 82.7% predicted), air trapping (i.e., residual volume/total lung capacity increased to 54.4%), and reduced flows (i.e., forced expiratory flow [FEF25-75] = 60.6% predicted, forced expiratory volume in 1 s = 78.0% predicted, and forced expiratory volume in 1 s/forced vital capacity = 65.5%). In contrast, men selected from the same exposed population for restrictive disease (i.e., reduced total lung capacity [72.6% predicted] and forced vital capacity [61.5% predicted]) also had airflow obstruction (i.e., forced expiratory volume in 1 s/forced vital capacity of 74.5% predicted) and air trapping (i.e., residual volume/total lung capacity of 46.7%). Only half of these men had asbestosis--and it was of minimal severity. In summary, advanced asbestosis was characterized by airway obstruction and air trapping, both of which reduced vital capacity but not total lung capacity; therefore, it was not a restrictive disease. In contrast, restrictive disease was rare and was associated with minimal asbestosis.

  • Unusually high incidence of malignant pleural mesothelioma in a town of eastern Sicily: an epidemiological and environmental study. L. Paoletti, D. Batisti, C. Bruno, et al. 2000;55(6):392-8. Case report PubMed · Publisher

    Abstract

    In a recent epidemiological study, researchers investigated mortality from malignant pleural neoplasms in Italy, and they detected some geographic clusters of cases of this disease. We found a town located in a volcanic area of eastern Sicily to be of special interest. The residents, some of whom were diagnosed with pleural mesothelioma, had never had any relevant exposure to asbestos during their professional lives. The results of an environmental survey suggested that a possible cause of asbestos exposure was the stone quarries near the town. The products of the quarries contain fibrous amphiboles, which are used widely in the local building industry. These fibrous amphiboles were identified as intermediate phases between tremolite and actinolite. Samples were collected from buildings in the town, and concentrations of amphibole fibers were evaluated. Fibrous phases were detected in 71% of the samples, and fiber concentrations ranged from a few thousand to more than 4 x 10(4) fibers/mg of material. In addition, we conducted a study on the mineral fiber lung burden in a pleural mesothelioma case. Many mineral fibers that were classified as the same tremolite-actinolite fibrous amphibole found in the quarries and in the building materials were detected in the lung tissue. The results suggest that the inhabitants of the town we studied had been exposed for several decades to asbestos fibers that were present in the material extracted from the local stone quarries. The material was subsequently used in the building industry, and this has caused an increased risk of pleural mesothelioma in the area.

1990s

  • Risk assessment of lung cancer and mesothelioma in people living near asbestos-related factories in Taiwan. H.Y. Chang, C.R. Chen, J.D. Wang. 1999;54(3):194-201. PubMed · Publisher

    Abstract

    Estimates from environmental risk assessments are criticized by professionals who indicate that inaccuracies occur in exposure assessment, model selection, and determination of the population at risk. In the current study, we tackled the aforementioned issues and estimated the risks of lung cancer and mesothelioma caused by airborne asbestos among individuals who lived near asbestos factories in Taiwan. We conducted 8-h full-period samplings upwind and downwind from each factory, and we used transmission-electronic microscopy (10,000x) and phase-contrast microscopy to determine asbestos concentrations in and around each factory. We estimated the numbers of residents who lived in concentric circles of 200-m, 400-m, and 600-m diameters around each factory. A dose-response model for asbestos-induced lung cancer was adopted from a summary of seven epidemiological studies. The asbestos-mesothelioma models were patterned after the first-exposure-effect models developed by Peto and Finkelstein. The data obtained from phase-contrast microscopy significantly overestimated the risk, compared with transmission-electronic microscopy. The estimates we calculated from adopting the arithmetic mean were approximately 2-fold higher than those we calculated with the geometric mean. There were relatively low concentrations of asbestos in the study areas, thus causing an absence of a significant difference in risk estimates between different models for mesothelioma. Among the more than 20,000 residents who lived near 41 asbestos factories in Taiwan, we found that the numbers of expected excess deaths from lung cancer and mesothelioma were 5 and less than 1, respectively. We concluded that in future risk assessments for ambient asbestos exposure, investigators should adopt transmission-electronic microscopy and the geometric mean estimate. Moreover, Taiwan should enhance asbestos-control programs to assure the safety of residents who live near asbestos factories.

  • Pulmonary function of nonsmoking female asbestos workers without radiographic signs of asbestosis. X.R. Wang, E. Yano, K. Nonaka, et al. 1998;53(4):292-8. PubMed · Publisher

    Abstract

    Researchers disagree about whether exposure to asbestos causes significant respiratory impairments and airway obstruction in the absence of radiographic asbestosis and smoking. To obtain confirmatory information, the authors examined pulmonary function of 208 nonsmoking female asbestos workers who did not have asbestosis and 136 controls. The authors observed an overall lower single-breath carbon monoxide diffusing capacity in the asbestos workers than in controls. In addition, significant decreases in percentage vital capacity, percentage forced vital capacity, and percentage mean forced expiratory flow during the middle half of the forced vital capacity were evident in the older workers. Logistic regression analysis revealed that asbestos exposure was associated with abnormal single-breath carbon monoxide diffusing capacity, vital capacity, and mean forced expiratory flow during the middle half of the forced vital capacity among the older workers. The age-related decline in vital capacity, forced vital capacity, and mean forced expiratory flow during the middle half of the forced vital capacity was significantly greater in the asbestos workers than the controls. The findings imply that asbestos-exposure per se contributes predominantly to restricted lung volume and reduced single-breath carbon monoxide diffusing capacity. Asbestos may also cause slight airway obstruction, especially in workers who are heavily exposed.

  • Fiber analysis in lungs of residents of a Japanese town with endemic pleural plaques. Y. Murai, M. Kitagawa, T. Hiraoka. 1997;52(4):263-9. PubMed · Publisher

    Abstract

    The authors analyzed various types of fibers in lung-tissue samples, which were obtained from 50 cases (46 surgical resections and 4 autopsies) at Kumamoto-Minami Hospital in Matsubase, where the occurrence of pleural plaques is endemic. Lung cancer necessitated surgical resection in 44 cases. Eleven of the 50 cases were residents of Matsubase; 15 resided in the region around the town, where the frequency of pleural plaques was slightly higher; and 24 cases lived in a region with normal plaque frequency. The number of anthophyllite fibers in the lungs of town residents was significantly higher than in residents of the region with normal plaque frequency. In 6 cases, the authors found accompanying pleural plaques, and the anthophyllite fiber count in the lungs in these cases was significantly higher than in cases without plaques. In addition, the anthophyllite fiber counts in 2 cases with severe plaques were significantly higher in 4 cases with only mild plaques. These results suggested that anthophyllite fiber might be responsible for the increased prevalence of pleural plaques in Matsubase. Even though the anthophyllite fibers were quite long (mean length = 25.1 microm), the width of most anthophyllite fibers were thick (mean diameter = 0.84 microm). Therefore, the aspect ratio of anthophyllite (mean = 38.7) was lower than that of amosite (mean = 81.8), which, in a previous report, was found predominantly in cases of pleural mesothelioma. Perhaps these differences in fiber size are related to the strength of the carcinogenicity to the pleura.

  • Inorganic particles in bronchoalveolar lavage fluids from nonoccupationally exposed subjects. M. Falchi, L. Biondo, C. Conti, et al. 1996;51(2):157-61. PubMed · Publisher

    Abstract

    This study comprised 30 patients who had not been exposed occupationally to dusts, but for whom a diagnosis of suspected pulmonary carcinoma had been made. Bronchoalveolar lavage fluids from these patients were analyzed by transmission electron microscopy and by energy-dispersive x-ray microanalysis in an effort to study the mineral particulate present in the alveolar region. Particles of silica, silicates, oxides, sulphates, and metal alloys were detected in various percentages in each subject. The smoking habits of two groups of patients that were defined by their bronchoalveolar lavage particulate concentrations (i.e., lower or higher than the median of the distribution) differed significantly.

  • Relationships between ferruginous bodies and uncoated asbestos fibers in lung tissue. R.F. Dodson, M. O'Sullivan, C.J. Corn. 1996;51(6):462-6. PubMed · Publisher

    Abstract

    Tissue was obtained from two American groups. The tissue was defined by ferruginous body levels of either < or = 1000 or > 1000 ferruginous bodies/g dry weight, and tissue was evaluated by light microscopy and analyzed by analytical transmission electron microscopy. Tissue was bleach digested, and uncoated asbestos fibers were classified with respect to type and size. In addition, some ferruginous body cores were analyzed. There was a wide range of uncoated fibers associated with each ferruginous body. A relationship was found between amosite fibers and ferruginous bodies. Other asbestos types were not associated significantly with the development of ferruginous bodies. Uncoated crocidolite fibers were not detected in these samples; this result further emphasizes the under-appreciated exposure of Americans to amosite. The levels of ferruginous bodies in both groups suggest exposures above those expected in the general population. Uncoated chrysotile levels were below the ranges reported previously for some general populations. The data suggest that there is a wide variation in the ratio of uncoated to coated fibers and that the amphibole in the United States is more likely to be amosite than crocidolite.

  • Exposure to asbestiform minerals and radiographic chest abnormalities in a talc mining region of upstate New York. E.F. Fitzgerald, A.D. Stark, N. Vianna, et al. 1991;46(3):151-4. PubMed · Publisher

    Abstract

    A radiologist in New York reported a high prevalence of pulmonary fibrosis in St. Lawrence and Jefferson counties. The New York State Department of Health responded by conducting a case history study of radiographic abnormalities found in the lung parenchyma and pleura of residents in Lawrence and Jefferson counties, where tremolitic talc has been mined for many years. During a 1-y period, all radiographs from 6 hospitals in the region were reviewed. A B-reader confirmed that 355 of 9,442 patients who were at least 40 y of age (3.8%) had a relevant abnormality; 60% of them reported occupational exposure to asbestiform minerals, and another 15% had a chest condition or injury that could have accounted for the abnormal radiograph. The results should be interpreted cautiously, but there was no evidence of widespread radiographic abnormalities resulting from ambient dust exposure. The data, however, support earlier studies that indicate that talc miners and millers experience excess parenchymal fibrosis and pleural changes. The data also suggest that individuals in the paper industry and construction trades may be at risk.

1980s

  • Factors influencing the reading of small irregular opacities in a radiological survey of asbestos miners in South Africa. G.K. Sluis-Cremer, P.A. Hessel, E. Hnizdo. 1989;44(4):237-43. PubMed · Publisher

    Abstract

    A cross-sectional radiological survey of 2,245 men who were employed in South African asbestos mines was conducted in 1976. Since 1976, the lungs of 172 of these men who died have been examined to establish the presence of asbestosis or other pneumoconiosis. The x-ray readings (ILO/UC 1971) were compared with the pathological findings. A high prevalence of false positive readings, particularly for two of the three readers, was found. False negative readings were also very prevalent. Detailed information about asbestos and other mining exposure, smoking habit, age, height, and weight were examined to determine what influence they may have had in inducing false positive findings. Other dust exposure and smoking appeared to be possible factors, whereas age and obesity were probably not. It is suggested that the term "small irregular opacities" requires more precise definition.

  • Does the 1980 ILO classification of pneumoconiosis need a facelift?. K.H. Kilburn. 1988;43(4):261-2. PubMed · Publisher

  • Screening of autopsy populations for previous occupational exposure to asbestos. F. Mollo, A. Andrion, D. Bellis, et al. 1987;42(1):44-50. PubMed · Publisher

    Abstract

    A screening procedure to select, in autopsy populations, subjects having a major likelihood of previous occupational exposure to asbestos is described. To test our necropsy population we searched for pleural plaques (PPs); the optical count of both lung asbestos bodies (ABs) and uncoated mineral fibers (UMFs) at least 10 microns in length was recorded. In the adult autopsy population studied in the Turin area, the predictive value given by a positive test for large-size PPs (mostly bilateral) was about 55%. This level of probability did not rise in relation to the AB counts, whereas an increase to over 75% was observed if more than 10,000 UMFs/g dry lung were present. In subjects without PPs or with small-size plaque lesions (mostly unilateral), predictive values of positive tests were 20 to 30% when ABs and UMFs were found to be below 100 and 10,000/g, respectively, and increased to approximately 40% if the AB count exceeded 500/g and to almost 70% for an UMF count above 100,000/g. In subjects without PPs or with small-size plaque lesions, the probability of being nonexposed was greater than 90% if neither ABs nor UMFs were found. This autopsy screening may be a reliable tool in selecting cases most probably related to occupational exposure.

  • Value of the lateral view in diagnosing pleural plaques. G. Hillerdal. 1986;41(6):391-2. PubMed · Publisher

    Abstract

    To assess the value of the lateral view in the diagnosis of pleural plaques, 2018 chest roentgenograms from the general population were scrutinized for such plaques. The lateral and posterior-anterior (PA) views were read separately and without knowledge of the occupational history or other clinical data. Of the males, 4.8% had pleural plaques in the PA view and 2% had dorsal pleural plaques in the lateral view. A total of 54% of the positive cases in the PA view also showed dorsal plaques in the lateral view, while 69% of those with dorsal plaques also showed typical plaques in the PA view. Thus, there remained a number of cases which were diagnosed only in the lateral view; in all, these constituted 18.8%.

  • Airway disease in non-smoking asbestos workers. K.H. Kilburn, R.H. Warshaw, K. Einstein, et al. 1985;40(6):293-5. PubMed · Publisher

    Abstract

    Ninety-seven non-cigarette-smoking white male insulators from the midwestern United States had significantly reduced forced expiratory volume in 1 second (FEV1.0) (P less than .0017) and forced expiratory flow from 75 to 85% of expired volume (FEF75-85) (P less than .042) when compared to a reference population of Michigan male nonsmokers. There were parenchymal opacities with a profusion of 1/0 or greater in 7 and pleural changes in 13 of these 97 nonsmokers. Asbestos, in the absence of cigarette smoke effects and other diseases, appears to decrease airflow, probably by the distortion of small airways (less than 2mm) by peribronchiolar fibrosis. This stiffening of the lung parenchyma protects midflow (FEF25-75) as the fibrosis increases the lung's radial traction on airways larger than 2 mm. This observation contributes to the natural history of physiological impairment due to asbestos disease.

  • Temporal patterns of exposure and nonmalignant pulmonary abnormality in Quebec chrysotile workers. R. Copes, D. Thomas, M.R. Becklake. 1985;40(2):80-7. PubMed · Publisher

    Abstract

    Questionnaire, radiographic, and lung function information for 983 Quebec chrysotile workers at work in 1966 was used to develop five clinical response scales (i.e., parenchymal and pleural fibrosis, airflow limitation, chronic bronchitis, and airway reactivity). The relationship of the scales to variables describing temporal patterns of exposure was studied, taking into account cumulative exposure, age, and smoking. All response scales related to variables containing only time information, and in all cases temporal patterns of exposure influenced exposure response relationships. For pulmonary fibrosis, the strongest relationships were to cumulative exposure; for pleural fibrosis to exposure peaks and residence time of dust in the lung; for airway reactivity to early and recent exposure; and for airflow limitation and chronic bronchitis to smoking and to dust level and load over time. These results add to the gathering evidence that exposures to environments containing airborne asbestos may result in airway abnormalities.

  • Environmental asbestos exposure and cancer mortality. M. Neuberger, M. Kundi, H.P. Friedl. 1984;39(4):261-5. PubMed · Publisher

    Abstract

    From 1970 to 1980, mortality from cancer of the lung and stomach was analyzed in a town with asbestos deposits and in a town with asbestos processing. The populations of the entire country, the province, the district, and of all communities of the same size and agricultural index were used as references. In the town with asbestos contamination of air and water from natural tremolite deposits and an endemic occurrence of pleural plaques, no increased risk for lung or stomach cancer was found. In the town with asbestos cement production lung cancer rates were lower in males and higher in females, and stomach cancer rates were lower than expected. No significant differences could be attributed to environmental asbestos exposure.

  • Asbestos-related mesothelioma: epidemiological evidence for asbestos as a promoter. K. Browne. 1983;38(5):261-6. PubMed · Publisher

    Abstract

    A series of 144 cases of mesothelioma among asbestos workers indicated important divergences from the epidemiological pattern shown to exist for asbestos-related lung cancer. Consideration of exposure duration and intensity and the latent period between first exposure and death suggests that asbestos does not act as a complete carcinogen, but as a promoter. A threshold seems probable for both duration and intensity of exposure in the induction of mesothelioma. This threshold may, in part, be related to the passage of fibers from the lungs to the pleura or peritoneum, and would, in any case, be masked in lung cancer by the retention of asbestos in the lungs. Reported cases of mesothelioma in immediate family members indicate the existence of an additional factor in mesothelioma induction, acting earlier in life than the first asbestos exposure.

  • Late progression of radiographic changes in Canari chrysotile mine and mill exworkers. J.R. Viallat, C. Boutin, J.F. Pietri, et al. 1983;38(1):54-8. PubMed · Publisher

    Abstract

    The present radiological status of 133 exworkers (mean age: 58 +/- 0.7 yr) of the chrysotile mine of Canari (Corsica) was compared to that recorded in 1965, when the mine was closed. The mean time since first exposure is 27 +/- 0.4 yr, and the mean time since termination of asbestos exposure equals 16 +/- 0.3 yr. This study showed an evolution of radiographic changes: in 1965 only 14% of the subjects had grade 1/1 or more parenchymal fibrosis, and 6% had bilateral pleural lesions; in 1979 these percentages reached 40% and 27%, respectively. Subjects who had a given parenchymal change in 1965 (e.g., 1/1 grade lesions) were older and had a more intensive dust exposure and tobacco consumption than exminers who developed the same parenchymal changes much later. A progression of parenchymal changes was observed in 39% of the subjects with normal findings in 1965, and in 63% of the subjects with grade 1/1 or more changes in 1965. Those who progressed (46% of the cohort) were older, had a longer exposure, and a more intensive dust exposure and cigarette smoking than nonprogressors.

  • Environmental fiber-induced pleuro-pulmonary diseases in an Anatolian village: an epidemiologic study. M. Artvinli, Y.I. Baris. 1982;37(3):177-81. PubMed · Publisher

    Abstract

    This study was designed to determine the prevalence of pleural mesothelioma and other malignancies in the Anatolian village of Tuzköy, where neither asbestos nor any environmental carcinogen has been detected. Another village (Kizilköy) located 12 km from Tuzköy was selected as a control. Three hundred twelve subjects from Tuzköy who were at least 25 yr of age and 95 subjects from Kizilköy were studied. Analysis of X-rays of the Tuzköy group revealed that subjects had calcified pleural plaques (17%), pleural thickening (10.5%), obscured costophrenic angles (15%), and diffuse interstitial pulmonary fibrosis (12.1%). Sixty-seven deaths were records in Tuzköy during the previous 3 yr, 41 of which resulted from malignant diseases. There were no X-ray abnormalities or deaths resulting from malignancies in the control group. Because of the high incidence of mesothelioma and lung cancer which usually results from asbestos exposure, the presence of asbestos in Tuzköy was investigated, but none was detected in spite to Tuzköy's volcanic location. Nevertheless, zeolite, an asbestiform mineral, was detected in the stones of buildings and in the village soil, as well as in the lung and pleura of the patients during biopsy. Thus, this mineral was considered to be responsible for the fiber-induced pleuro-pulmonary diseases in Tuzköy. No zeolite was found in the soil and stones of the control village.

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