Studies on Vibrio Parahaemolyticus

A survey was conducted in six fishing ports on the Japan Sea and three cities in Tottori Prefecture over a period of July, 1962, to March, 1965, to clarify the distribution of Vibrio Parahaemolyticus, an vibrio causing acute enteritis, in sea water and fish caught and on sale.1. Vibriones were detected from 14 samples (16.7 per cent) of 84 of sea water collected from five ports. The positive samples were among those collected during a period of April to October.2. When fish were examined at the fishing ports, vibriones were detected from 28 samples (12.5 per cent) of 225. The positive samples had been collected from four ports from April through October. As for fish on sale examined during a seven-month period ending in December, 1963, 4 samples (7.1 per cent) out of 56 were positive for isolation of vibriones. They had been collected from August to October.3. A total of 65 strains of Vibrio Parahaemolyticus were isolated during this survey. Of them, 16 strains (24.6 per cent) belonged to biotype 1 and the other 49 strains to biotype 2.