Blood chromium levels of children working in gem-polishing industries in India.

The gem-polishing industry in Jaipur, India employs a substantial proportion of children. The process of polishing may result in exposure to chromium in working children. Thus, this study aims to find out the levels of chromium in these working children and the associated factors.

Study of lead exposure to children residing near a lead-zinc mine.

This lead exposure study was conducted in a total of 452 school children in the age group of 9-14 years. Two hundred and ninety-eight exposed children came from the villages situated within a 2.5 km radius of the lead-zinc mine whereas the comparative group children were selected from the villages at least 10 km away from mine.

Chromium exposure study in chemical based industry.

176 chromium-exposed and 30 control subjects were selected for this study. Blood samples (3 ml) were collected for the estimation of chromium. The data on chromium concentration indicated a significant higher level of chromium in the blood of the exposed workers as compared to the control.

Semen quality of industrial workers occupationally exposed to chromium.

A total of sixty-one subjects occupationally exposed to chromium in an industry which manufactures chromium sulphate and fifteen control subjects from a nearby industry which does not manufacture any chromium related compounds were studied. The history of each subject was recorded on pre-designed form through interview and a routine medical examination was carried out. Blood samples (5-6 ml) were collected for the estimation of chromium and semen samples were collected for semen analysis and the determination of copper and zinc levels in the seminal plasma.

Serum copper levels among quartz stone crushing workers: a cross sectional study.

The present cross sectional study was carried out among 134 workers of quartz stone crushing units to assess the serum Cu activity among quartz stone workers without disease. Demographic and occupational details of the subjects were recorded on the predesigned proforma. Standard diagnostic criteria were used for diagnosing silicosis and tuberculosis.

Dustiness, silicosis & tuberculosis in small scale pottery workers.

Studies were carried out in eight small scale potteries to find out the airborne dust concentrations and the prevalence of dust related diseases like silicosis and tuberculosis in 292 workers. Chest radiography revealed that 44 (15.1%) pottery workers were suffering from silicosis and an equal number showed radiological evidence of tuberculosis.