Sample collection: one hundred and fifty eight raw
meat samples including pork (n = 54), beef (n = 54)
and chicken (n = 50) were obtained from 33 Thai selfservice
style restaurants in Khon Kaen municipality
during July-October 2011 Each restaurant was visited
for sample collection on one or two separate
occasions, depending on permission. The samples
were randomly collected from dishes served on tables
or buffet bars. Each sample was placed in individual
plastic bag, stored on ice and immediately delivered
to the laboratory of Department of Veterinary Public
Health, Faculty of Veterinary Science, Khon Kaen
University for bacterial isolation and identification.