<prompt> In cholera the highest case fatality is observed in case of -Classical cholera vibrioVibrio E I to rVibrio parahemolyticusNAG vibrios  <response>: Ans. is a i.e., Classical cholera vibria . Amongst these four vibrios, classical V. cholerae causes the most severe diarrhea. Read the following statements. . The moality rate of cholera, without treatment is between 25-50. . The incidence of mild and asymptomatic infections is more with El Tor vibrios than with classical cholera vibrios. . Most cases of v.parahaemolyticus - associated gastro intestinal illness, regardless of the presentation, are self limited and required neither antimicrobial treatment nor hospitalization. Non-01 NAG strains of V cholerae cause mild, sometimes bloody diarrhea. Symptoms may occasionally be severe, in which case the disease resembles cholera. 