A. Dalsgaard et al., PREVALENCE OF VIBRIO-CHOLERAE AND SALMONELLA IN A MAJOR SHRIMP PRODUCTION AREA IN THAILAND, International journal of food microbiology, 28(1), 1995, pp. 101-113
In 1992 and 1993, a 7 months study was carried out in a major shrimp-
producing area in Southern Thailand to study the prevalence of Vibrio
cholerae and Salmonella. A total of 158 samples were examined includin
g water, sediment, shrimp, pelleted feed, shrimp gut, and chicken manu
re. Salmonella was not recovered from any sample type studied. V. chol
erae O1 was isolated from 2 (2%) and V. cholerae non-O1 was isolated f
rom 35 (33%) of 107 samples examined. The occurrence of V. cholerae wa
s not significantly influenced by water salinity, temperature, dissolv
ed oxygen or pH. There was no correlation between fecal coliform count
s and the prevalence of V. cholerae. The results indicate that V. chol
erae non-O1 is ubiquitous in aquatic environments where shrimp culture
is practised under a variety of environmental conditions. The public
health significance of non-O1 V. cholerae in shrimp culture remains to
be determined. V. cholerae O1 and Salmonella do not appear to constit
ute a hygienic problem even if chicken manure was used as fertilizer.