منابع مشابه
Transmigration of ingested asbestos.
There has been speculation that the ingestion of asbestos in food and drinking water may play some role in the etiology of cancer of the gastrointestinal (GI) tract. An important question in the evaluation of the possible human cancer risk associated with asbestos ingestion is whether fibers can penetrate into and through the GI tract in sufficient numbers to cause adverse systemic or local eff...
متن کاملCritical review of epidemiologic studies related to ingested asbestos.
Thirteen epidemiologic studies of ingested asbestos conducted in five areas of the United States and Canada were reviewed and evaluated for the definitiveness and applicability regarding the development of ambient water quality standards. One or more studies found male or female associations between asbestos in water supplies and cancer mortality (or incidence) due to neoplasms of the esophagus...
متن کاملHuman cancer risk from ingested asbestos: a problem of uncertainty.
Although studies of populations exposed to high concentrations of asbestos fibers in drinking water appear attractive as research opportunities to define an asbestos-related risk, they are unlikely to provide a definitive answer to the question of whether asbestos in drinking water is associated with an elevated risk of malignancy. Consider, for example, a hypothetical 10-yr analysis of the dea...
متن کاملAccumulation of ingested asbestos fibers in rat tissues over time.
With the use of the transmission electron microscope, asbestos fibers have been assessed in kidney cortex of four groups of rats previously exposed to intermediate-range feeding grade chrysotile asbestos. Newborn rats, from mothers gavaged with asbestos during pregnancy, were gavaged twice a week at the dose level of 50 mg/kg beginning at age day 7 until their natural death or sacrifice. The ra...
متن کاملBiological effects of ingested asbestos: report and commentary.
The concept of whole retina radiotherapy for infants and youngsters with retinoblastoma is not new. Such treatment was pioneered in the early 1960's shortly after the linear accelerator became available for medical use (Bagshaw & Kaplan, 1966). The linear accelerator provided the possibility of using focused small field megavoltage radiation beams to treat the entire retina while simultaneously...
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ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 1983
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.8353149