True about V cholera 0139 all except -: (A) Clinical manifestations are similar 01 Eltor strain, (B) First discovered in Chennai, (C) Epidemiologically indistinguishable from 01 Eltor strain, (D) Produces 01 Lipopolysaccharide
Answer is D. Ans. is 'd' i.e., Produces 0-1 lipopolysacchride . V. cholerae have been classified based on somatic antigen '0' (`O' lipopolysaccharide). . There are at least 139 '0' antigen groups (`O' 1, '0'2, '0'3........ '0' 139) . Most of the cases of cholera are caused by 01 group ---> contain 0-1 lipopolysaccharide. . The remaining 138 (`O' 2 to '139) belong to Non '0' 1 group ---> Do not have 0 -1 lipopoly saccharide. . Amongst the Non 01 group, V cholerae '0' 139 causes cholera. It has '0' 139 LPS. About other options . V. cholerae 0-139 was first isolated from a cholera outbreak in Chennai.