Abstract
We defined the role of the syrphid flyEristalis tenax in the survival and transmission of mycobacteria in pigs. The conditionally pathogenic mycobacterial (CPM) speciesMycobacterium chelonae was isolated from 10 % of liquid dung samples, and bothM. chelonae and another CPM speciesM. fortuitum were isolated from 7 (78 %) of the examinedE. tenax larvae collected from the same location. Mycobacteriosis of the lymph nodes of pigs from 3 infected farms was caused byM. avium subsp.avium, M. avium subsp.hominissuis, andM. fortuitum. M. avium subsp.avium andM. avium subsp.hominissuis of identical genotype and serotypes andM. fortuitum were isolated from 7 (1.9 %) larvae, 2 (7.4 %) puparia, and one (1.6 %) imago. The count of colony forming units isolated from larval skin covering (pouch) was higher (p ≤ 0.01) than that isolated from the internal organs of larvae. These results showed the potential forE. tenax larvae to spread mycobacteria throughout pig herds and the surrounding environment.
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The study was supported by grants NPV IB53009, QD1191, and MZE 0002716201 of theMinistry of Agriculture of the Czech Republic.
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Fischer, O.A., Mátlová, L., Dvorská, L. et al. Various stages in the life cycle of syrphid flies (Eristalis tenax; diptera: Syrphidae) as potential mechanical vectors of pathogens causing mycobacterial infections in pig herds. Folia Microbiol 51, 147–153 (2006). https://doi.org/10.1007/BF02932171
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DOI: https://doi.org/10.1007/BF02932171