Which of the following is true of cholera-

Vibrio causes secretory diarrhea. About Other options: Recent epidemics are due to O1 ElTor and also O139 serovar. (Classical still exists and few cases were reported from Bangladesh) Vibriocidal antibodies in serum (titer 1:20) have been associated with protection against colonization and disease. …………… Jawetz 25/e p237 Endotoxin (LPS) does not play any role in pathogenicity of cholera but is responsible for immunity developed by killed vaccine.