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

We defined the role of the syrphid fly Eristalis tenax in the survival and transmission of mycobacteria in pigs. The conditionally pathogenic mycobacterial (CPM) species Mycobacterium chelonae was isolated from 10 % of liquid dung samples, and both M. chelonae and another CPM species M. fortuitum we...

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Bibliographic Details
Published in:Folia microbiologica 2006-01, Vol.51 (2), p.147-153
Main Authors: Fischer, O A, Mátlová, L, Dvorská, L, Svástová, P, Bartos, M, Weston, R T, Pavlík, I
Format: Article
Language:English
Subjects:
Animals
Bacteria
Chi-Square Distribution
Colonies
Diptera
Diptera - microbiology
Disease transmission
Dung
Eristalis tenax
Farms
Genotypes
Infection
Insect Vectors - microbiology
Larva - microbiology
Larvae
Life cycle
Life cycles
Liquid manure
Lymph nodes
Microbiology
Mycobacteriosis
Mycobacterium
Mycobacterium - isolation & purification
Mycobacterium avium
Mycobacterium avium - isolation & purification
Mycobacterium avium - pathogenicity
Mycobacterium chelonae
Mycobacterium Infections - microbiology
Mycobacterium Infections - veterinary
Nontuberculous Mycobacteria - isolation & purification
Organs
Pathogens
Puparia
Serotypes
Skin
Survival
Sus scrofa - microbiology
Swine
Swine Diseases - microbiology
Syrphidae
Vectors
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Summary:We defined the role of the syrphid fly Eristalis tenax in the survival and transmission of mycobacteria in pigs. The conditionally pathogenic mycobacterial (CPM) species Mycobacterium chelonae was isolated from 10 % of liquid dung samples, and both M. chelonae and another CPM species M. fortuitum were isolated from 7 (78 %) of the examined E. tenax larvae collected from the same location. Mycobacteriosis of the lymph nodes of pigs from 3 infected farms was caused by M. avium subsp. avium, M. avium subsp. hominissuis, and M. fortuitum. M. avium subsp. avium and M. avium subsp. hominissuis of identical genotype and serotypes and M. 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 < or = 0.01) than that isolated from the internal organs of larvae. These results showed the potential for E. tenax larvae to spread mycobacteria throughout pig herds and the surrounding environment.
ISSN:0015-5632
1874-9356
DOI:10.1007/BF02932171