Invading slugs ( A rion vulgaris) can be vectors for L isteria monocytogenes
2015; Oxford University Press; Volume: 118; Issue: 4 Linguagem: Inglês
10.1111/jam.12750
ISSN1365-2672
AutoresKristine Gismervik, Marina Aspholm, Liv Marit Rørvik, Torkjel Bruheim, Anders Andersen, Ida Skaar,
Tópico(s)Animal Ecology and Behavior Studies
ResumoListeriosis is a frequent silage-associated disease in ruminants. The slugs Arion vulgaris are invaders in gardens, vegetable crops and meadows for silage production. Field and laboratory studies were conducted to clarify whether slugs could host Listeria monocytogenes and thereby constitute a threat to animal feed safety.Selective culture of L. monocytogenes from 79 pooled slug samples (710 slugs) resulted in 43% positive, 16% with mean L. monocytogenes values of 405 CFU g(-1) slug tissues. Of 62 individual slugs cultured, 11% also tested positive from surface/mucus. Multilocus sequence typing analysis of 36 isolates from different slug pools identified 20 sequence types belonging to L. monocytogenes lineages I and II. Slugs fed ≅4·0 × 10(5) CFUL. monocytogenes, excreted viable L. monocytogenes in faeces for up to 22 days. Excretion of L. monocytogenes decreased with time, although there were indications of a short enrichment period during the first 24 h.Arion vulgaris may act as a vector for L. monocytogenes.Highly slug-contaminated grass silage may pose a potential threat to animal feed safety.
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