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J. Vet. Sci. 2016; 17(4): 531-538  https://doi.org/10.4142/jvs.2016.17.4.531
Epizootiological characteristics of viable bacteria and fungi in indoor air from porcine, chicken, or bovine husbandry confinement buildings
Katharine Roque1, Gyeong-Dong Lim1, Ji-Hoon Jo1, Kyung-Min Shin1, Eun-Seob Song1, Ravi Gautam1, Chang-Yul Kim1, Kyungsuk Lee2, Seungwon Shin3, Han-Sang Yoo3, Yong Heo1, Hyoung-Ah Kim4,*
1Department of Occupational Health, College of Medical and Public Health Sciences, Catholic University of Daegu, Gyeongsan 38430, Korea
2National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Korea
3Department of Infectious Diseases and BK21 PLUS, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
4Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea
Correspondence to: Hyoung-Ah Kim
Tel: +82-2-2258-7364; Fax: +82-2-532-3820;
E-mail: kimha@catholic.ac.kr
Received: February 19, 2016; Revised: April 13, 2016; Accepted: June 8, 2016; Published online: December 30, 2016.
Microorganisms found in bioaerosols from animal confinement buildings not only foster the risk of spreading diseases among livestock buildings, but also pose health hazards to farm workers and nearby residents. This study identified the various microorganisms present in the air of swine, chicken, and cattle farms with different kinds of ventilation conditions in Korea. Microbial air samples were collected onto Petri dishes with bacterial or fungal growth media using a cascade impactor. Endotoxin levels in total dust were determined by the limulus amebocyte lysate kinetic QCL method. Prevalent Gram-positive bacteria were Staphylococcus (S.) lentus, S. chromogenes, Bacillus (B.) cereus, B. licheniformis, and Enterococcus faecalis, while the dominant fungi and Gram-negative bacteria were Candida albicans and Sphingomonas paucimobilis, respectively. Considering no significant relationship between the indoor dust endotoxin levels and the isolation of Gram-negative bacteria from the indoor air, monitoring the indoor airborne endotoxin level was found to be also critical for risk assessment on health for animals or workers. The present study confirms the importance of microbiological monitoring and control on animal husbandry indoor air to ensure animal and worker welfare. 
Keywords: Gram-negative bacteria, airborne microorganisms, cattle, chickens, swine

© 2016 The Korean Society of Veterinary Science.