Mycobacteria isolated from the environment of pig farms in the Czech Republic during the years 1996 to 2002
2003
Matlova, L. | Dvorska, L. | Bartl, J. | Bartos, M. | Ayele, W.Y. | Alexa, M. | Pavlik, I. (Vyzkumny Ustav Veterinarniho Lekarstvi, Brno (Czech Republic))
Sources of mycobacterial infections in 50 pig herds in the Czech Republic were investigated during the years 1996 to 2002. A total of 2,412 samples from the external environment (feeds, bedding materials, drinking water, biofilms on drinkers, scrapings from the walls, floors and pen barriers, dust, spider webs, peat, kaolin, faeces, organs of rodents, and birds, etc.) were examined. After staining by the Ziehl-Neelsen technique, acid-fast rods were detected in 3.9 % of samples and mycobacteria were cultured from 23.8 % of samples. From Mycobacterium avium complex (MAC), M. avium subsp. hominissuis (genotype IS901-, IS1245+) of serotypes 4, 6, 8, and 9 (47 % of isolates), M. a. avium (genotype IS901+, IS1245+) of serotype 2 (2.2 % of isolates) and M. intracellulare (genotype IS901-, IS1245-) of different serotypes (0.3 % of isolates) were detected most frequently. Peat given to piglets as a feed supplement was the most important source of mycobacteria (65.1 % positive of 327 examined samples); 81.2 % of them were positive for M. a. hominissuis of serotypes 4, 6, 8, and 9. High contamination levels were found in faecal samples (15.6 %) and in scrapings (18.4 %) from pens and stables. Mycobacteria were also detected in 7.9 % of various invertebrate species.
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