Recovery rates, serotypes, and antimicrobial susceptibility patterns of Salmonellae isolated from cloacal swabs of wild Nile crocodiles (Crocodylus niloticus) in Zimbabwe

Mogens Madsen, P. Hangartner, K. West, P. Kelly

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Samples from the cloaca and the ventral skin surface of 67 Nile crocodiles (Crocodylus niloticus) captured in four uninhabited areas at Lake Kariba, Zimbabwe, were cultured for Salmonella. All the skin samples tested negative for Salmonella, whereas 18 of 67 (26.9%) cloacal samples grew Salmonella. Significantly more males than females yielded Salmonella, but no statistically significant correlation among salmonella carriage, body size, nd age was recorded. Ten different serotypes of S. enterica belonging to the subspecies enterica, salamae, and diarizonae were isolated. All isolates belonging to subspecies enterica displayed invasive properties in an experimental mouse model and thus exhibited pathogenic potential, whereas none of the other isolates were invasive. In general, isolates were sensitive to a number of commonly used antimicrobials, except for three isolates that were resistant to streptomycin.
    Original languageEnglish
    JournalJournal of Zoo and Wildlife Medicine
    Volume29
    Issue number1
    Pages (from-to)31-34
    ISSN1042-7260
    Publication statusPublished - 1998

    Keywords

    • antibiotic sensitivity
    • reptiles
    • invasiveness
    • crocodile
    • Salmonella
    • Crocodylus niloticus

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