On slaughter day, samples
of dust, surfaces, water, feed and faeces were also collected. Finally, two days after
slaughter, carriers (rodents, flies and beetles) were trapped. All samples collected were
analysed according to ISO 6579:2002 (Annex D) and positive samples were serotyped in
accordance with Kauffman–White–Le–Minor technique. Our results showed that all different
types of samples collected were contaminated with Salmonella (prevalence ranged
between 1.5% and 38.6%)