Journal
SCHWEIZER ARCHIV FUR TIERHEILKUNDE
Volume 147, Issue 12, Pages 532-540Publisher
GESELLSCHAFT SCHWEIZER TIERARZTINNEN & TIERARZTE
DOI: 10.1024/0036-7281.147.12.532
Keywords
Salmonella spp.; Campylobacter spp.; vero-cytotoxin producing E. coli (VTEC); Francisella tularensis; prevalence
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In summer 2003, a study was performed in thirty Swiss petting zoos with the objective to determine the prevalence of zoonotic agents, and to describe hygiene measures implemented to reduce the risk of human infection. Fecal samples from different animal species were collected from the floor of pens to determine the prevalence of Salmonella spp., Campylobacter spp., verocytotoxin producing E. coli/VTEC and Francisella tularensis. A questionnaire on hygiene measures, number of animals per species, housing system, care procedures and feeding was. administered to every petting zoo to estimate exposure of visitors to zoonotic microorganisms. In total, 423 fecal samples were examined. Of these samples, 41 were positive for Campylobacter spp., which were mainly isolates from pigs and poultry (35% positive samples from each species). In pigs, 50% of the positive samples (6 samples) were typed as C. jejuni. The others were typed as C. coli (3) and C. lari (3), respectively. Five poultry isolates were typed as C. jejuni, and two as C. coli. Two samples were positive for Salmonella spp. Salmonella typhimurium was isolated from a goat, the other isolate could not be identified by serotyping. Neither Francisella tularensis nor verocytotoxin producing E. coli/VTEC were found. The low prevalence of zoonotic microorganisms in Swiss petting zoos could be attributed to the cleanness of enclosures and animals, low stocking rates and good animal care. However, there is room for improvement concerning visitors' information on hygiene and hand washing. Furthermore, a strict separation between picnic - areas and animals should be enforced.
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