The aim of this survey was to understand the level of hygiene in slaughterhouses and markets in
Northern Vietnam, and to elucidate the practice affecting Salmonella prevalence in the markets. The
data was collected from nine pork sellers in Hung Yen and Hanoi. Although some markets were
visited a few times in different days, the same market was counted as different markets because
market’s situation was thought to change from day to day. For this reason, the number of checklists
from markets is identical to the number of collected pork samples. As the number of slaughterhouses
worked on was only two