1985 Volume 59 Issue 6 Pages 551-558
In 1980, Vibri cholerae O1, biotype El Tor, serotype Inaba, was isolated from the Aja river, Okinawa, The 12 strains examined belonged to classical Ubol type.The original focus of the organisms could not be determined in spite of intensive survey.The organisms was characterized by an unique biochemical behaviour, i.e., no fermentation of sucrose in aerobic condition within 24 hours.The phage typing by El Tor cholera phage revealed type 1 in 11 strains and type 6 in 1 strain.On the contrary, the other 32 Ubol type strains recently isolated in various countries in the world revealed type 4 or untypable. These facts suggested that the Vibrio cholerae O1 isolated in Okinawa was not recently imported, but has been living there for a long time as native organism.The pathogenicity of the organisms were examined with De-test, toxigenicity and adhesive property to the intestinal epithelium.And these organisms appeared non or less pathogenic.
