The Thai Journal of Veterinary Medicine


Exposure to bioaerosol in hospitals is associated with health effects but in the field of veterinary hospitals there are limited articles on bioaerosol concentration especially in Southeast Asia. This investigation of aerosol bacteria (cross-sectional study) was conducted in two veterinary teaching hospitals located in Thailand. Airborne bacteria were collected from air samples infour room types (reception hall, intensive care unit, out-patient department and in-patient hospital department) in each hospital using a sieve impactorair sampler at different periods (8:00–10:00, 10:00–12.00 and 13:00–15:00). The results revealed high bacterial contamination in all collected air samples. The average levels of total viable bacteria count were >500 colony forming units (CFU)/m3in all rooms but at some periods aerosol bacteria were <500 CFU/m3. Also, in the late morning and afternoon period, aerosol bacteria increased from early morning period. Further investigation on the experimental efficacy of two different types of air purifier (also called cleaners in some of the literature) was tested to identify an alternative apparatus requiring limited space and competent for a high concentration of odor and animal fur. The non-ionized air purifier for animate space and the ozone generator air purifier for inanimate space significantly (p<0.05) reduced the aerosol bacterial concentration.

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