Assessment of nicotine dermal contact and urinary cotinine of tobacco processing workers.

Objective: To assess the dermal contact of nicotine dust, subjective symptoms and urinary cotinine of post curing tobacco workers.

Material And Method: Dermal hand wipes of residual nicotine dust samples, morning urine samples and subjective symptoms were collected from 30 workers. The hand-wipe samples and urine samples were analyzed for nicotine and cotinine by a GC/MS, respectively.

Assessment of nicotine inhalation exposure and urinary cotinine of tobacco processing workers.

Objective: To study the composition of tobacco dust, atmospheric nicotine concentration, urinary cotinine excretion and the subjective symptoms of workers in dry tobacco leaf preparation.

Material And Method: The tobacco dust in air of the breathing zone of workers and the urine samples of these workers and a comparison group were collected and analyzed by GC/MS. The accuracy, precision and detection limit of the methods were determined.

Risk assessment towards tuberculosis among hospital personnel: administrative control, risk exposure, use of protective barriers and microbial air quality.

A recent increase in the rate of tuberculosis among hospital personnel has led to a greater concern about the risk of Mycobacterium tuberculosis transmission in the hospital. A cross-sectional study was conducted to assess the risk of tuberculosis infection among hospital personnel of a governmental hospital in Bangkok by applying hospital tuberculosis control strategies, including administrative control, risk exposure, use of protective barriers when in contact with TB patients, and microbial air quality in the studied wards. Fourteen members of the infection control committee (ICC) and 118 hospital personnel were interviewed regarding the infection control policy and its implementation.

Tentative explanatory variable of lung dust concentration in gold miners exposed to crystalline silica.

Introduction: The first objective of the study was to investigate the relationships between quantitative lung mineral dust burdens, dust exposure history, and pathological fibrosis grading in silicotic workers. The second objective was to evaluate the association between particle size parameters, concentration of retained silica particles and the severity of the silicosis. Sixty-seven paraffin-embedded lung tissue samples of silicotic patients were analyzed.

Angular and fibrous particles in lung in relation to silica-induced diseases.

Introduction: The lung concentration of angular and fibrous particles was measured in cases of lung fibrosis only, in cases of lung fibrosis and lung cancer, and in cases of lung cancer only. These patients worked in different trades (mining, foundries, construction and were not a homogeneous group of exposed workers.

Material And Methods: Particles, both angular and fibrous, were extracted from lung parenchyma by a bleach digestion method, mounted on copper microscopic grids by a carbon replica technique, and analyzed by transmission electron microscopy (TEM) and energy-dispersive spectroscopy (EDS).