T HIS YEAR, IT HAS BEEN ESTIMATED THAT MORE than 1 million excimer laser procedures will be performed in the United States alone. A number of viral pathogens have been identified in tears and the ocular surface.1 This raises the possibility that viral particles2,3 or subcomponents4,5 may become part of the airborne contaminants of the laser that are ejected into the air at supersonic speed duri...

Hospitalized patients have a potential risk for nosocomial infections. Airborne fungi are one of the main causes of fungal infections in this group. The objective of this study was to investigate the concentrations and species of airborne fungi in two general hospitals in Shiraz, southern Iran. Air samples were collected from high-risk wards, using settle plate method. Fungal colonies were iden...

Filter media composed of electrostatically charged nonwovens is the key device in an air purifier. Pleated filters are constructed from a cardboard frame with lattice faces containing filter reinforce by expanded support grid, which have more surface area for trapping contaminants and capture airborne effectively than non-pleated filters. The aim this work to investigate dominant factors on fil...

soil samples were collected from seven sites in and around the metropolitan area of mexicocity. the locations were chosen as possible sources of fugitive dusts which contribute to suspended particulate matter in the atmosphere of mexico city. x-ray fluorescence (xrf) was used to determine the concentrations of several major elements (si, k, ca, ti, mn, and fe), as well as of other trace element...

Transmission and spread of exhaled contaminants in the air may cause many airborne infectious diseases. In addition to appropriate ventilation, cleaner devices are used as one most common ways improve indoor quality. Therefore, it is necessary understand performance an under different operating conditions. This study mainly concerns investigating effect presence or absence furniture its displac...

Methods for detecting microorganisms on surfaces are needed to locate biocontamination sources and to relate surface and airborne concentrations. Research was conducted in an experimental room to evaluate surface sampling methods and quantitative PCR (QPCR) for enhanced detection of a target biocontaminant present on flooring materials. QPCR and culture analyses were used to quantitate Bacillus...

BACKGROUND Individuals engaged in work in intensive animal houses experience some of the highest rates of occupationally related respiratory symptoms. Organic dust and in particular endotoxin has been most closely associated with respiratory symptoms and lung function changes in workers. It has previously been shown that for intensive poultry operations, type of poultry housing [cage-housed (CH...