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Prevalence of selected enteropathogenic bacteria in Hungarian finishing pigs

Biksi, I., Lőrincz, Márta, Molnár, Beáta, Kecskés, T., Takács, N., Mirt, Darja, Cizek, A., Pejsak, Z., Martineau, G. -P., Sevin, J. -L., Szenci, O.
Acta veterinaria Hungarica 2007 v.55 no.2 pp. 219-227
Brachyspira hyodysenteriae, Brachyspira pilosicoli, Clostridium perfringens A, Lawsonia intracellularis, Salmonella enterica, diarrhea, enteropathogens, feces, finishing, herds, polymerase chain reaction, swine
The aim of this study was to obtain prevalence estimates about the most important enteropathogenic bacteria: <i>Lawsonia intracellularis, Brachyspira hyodysenteriae, Brachyspira pilosicoli, Salmonella enterica</i> and <i>Clostridium perfringens</i> A and C in Hungarian farrow-to-finish pig herds. A total of 31 herds were selected, from where six pooled faecal samples, each containing three individual rectal faecal samples were collected from fattening pigs of 5–6 months of age. All 186 samples were examined by polymerase chain reaction (PCR) for the presence of the pathogens mentioned above. <i>Lawsonia intracellularis</i> was found in 29 herds (93.55%) and in 108 samples (58.06%); <i>B. hyodysenteriae</i> in 14 herds (45.16%) and in 23 samples (12.37%); <i>B. pilosicoli</i> in 19 herds (61.29%) and in 53 samples (28.49%); <i>S. enterica</i> in 17 herds (54.83%) and in 40 samples (21.50%). We detected the presence of <i>C. perfringens</i> A in 19 herds (61.29%) and in 46 samples (24.73%), while <i>C. perfringens</i> C was found in 8 herds (25.81%) and in 11 samples (5.91%). All examined herds were infected with one or more of these agents. Herds with diarrhoea in the mid-to late finishing phase had almost 10 times higher prevalence of <i>B. hyodysenteriae</i> than herds without such a history.