<prompt> Which of the following is true of cholera-Recent epidemic was due to classical typeCauses secretory diarrhoeaCaused by endotoxinVibriocidal antibodies correspond to susceptibility  <response>: Ans. is b i.e., Causes secretory diarrhoea . Recent epidemic was due to non-01 V.cholerae NAG vibrio in 1992. This strain was designated serovar 0-139 0-139 Bengal. . Enterotoxin Cholera toxin causes watery diarrhea by acting directly on secretory mechanism through cAMP. . Cholera is due to exotoxin cholera toxin. Cholera vibrios also possess lipopolysaccharide endotoxin, but it has no role in pathogenesis. . Vibriocidal antibodies in serum have been associated with protection against colonization and disease 