Qualitative structure of airborne bacteria and fungi in dairy barn and nearby environment
2007
Matkovic, K.,University of Zagreb (Croatia). Dept. of Animal Hygiene | Vucemilo, M.,University of Zagreb (Croatia). Dept. of Animal Hygiene | Vinkovic, B.,Croatian Veterinary Inst., Zagreb (Croatia). Dept. of Zoohygiene and Livestock Technology | Seol, B.,University of Zagreb (Croatia). Dept. of Animal Hygiene | Pavicic, Z.,University of Zagreb (Croatia). Dept. of Animal Hygiene | Matkovic, S.,Ministry of Agriculture, Forestry and Water Management, Zagreb (Croatia)
Measurements of air bacterial and fungi contaminations were performed in morning, noon and evening sampling periods once a week during two autumn months inside a dairy barn and in a 25 m distant barn environment. A Merck MAS-100 air sampler was employed with different medium and incubation combinations for the capture and identification of the microorganisms. The results of the study showed a statistically significant difference between the bacterial and fungi counts measured inside and outside the barn, as total outside bacterial counts were by 97.4% to 98.0% lower, and total outside fungi counts by 85.2% to 99.4% lower than the respective indoor values in various sampling periods. In 125 analyzed colonies, gram-positive bacteria, especially those of the genera Staphylococcus and Streptococcus, were most commonly identified in the air samples from both inside and outside the barn. Gram-negative bacteria were present at a low rate, dominated by enterobacteria as well as the genera Moraxella and Pseudomonas. Nine mould genera were identified in 325 fungi colonies, dominated by the genera Aspergillus, Penicillium, Rhizopus and yeasts, both in the barn and in the nearby environment.
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