Airborne concentrations of bacteria and fungi in Thailand border market

摘要: Thailand border market is where the local Thais, Cambodians, Laotians, and Burmeses exchange their goods culture at checkpoints. It considered to be source of aerial disease transmission especially for foreigners because it always very crowded with people from all walks life. Unhealthy air quality makes this area high risk spread airborne diseases. This study assessed concentrations bacteria fungi in a improve exposure estimates develop efficient control strategies reduce health risk. The density distribution were investigated Chong Chom Surin Province, Thailand. Eighteen sampling sites taken outdoors various work environments including indoor footpaths, wooden handicraft shops, electronic secondhand clothing fruit areas. Exposed Petri plate method liquid impinger sampler used breathing zone, 1.5 m above floor level, during weekend holiday. Meteorological factors such as relative humidity, temperature, light intensity collected by portable data logger. humidity was 67–73%, temperature 29–33°C, varied between 18 270 Lux m−2. Gram-positive Gram-negative found mean value 104 CFU m−3, 103 CFU m−3 recorded. highest concentration culturable microorganisms along footpath (9.62 × 104 750.00 CFU/plate/h impingement sedimentation methods, respectively), (7.86 × 104 592.42 CFU/plate/h shop (4.59 × 103 335.42 CFU/plate/h respectively) bacteria, fungi, respectively. lowest only outdoor 1.53 × 104 0.93 × 104 0.80 × 103 means 136.67 CFU/plate/h, 69.25 CFU/plate/h, 62.00 CFU/plate/h methods most frequently present identified Bacillus, Corynebacteria, Diplococcus, Micrococcus, Acinetobacter, Alcaligenes, Enterobacter, spore former rods. Acremonium, Aspergillus, Cladosporium, Penicillium, Sporotrichum aerosol genera. correlated based on principal component analysis. In conclusion, potential hazards bioaerosols workers, consumers, sellers, tourists. bioaerosol exceeded standard occupational limit. Many major indicators allergenic toxigenic Pseudomonas, Alternaria, environments.