<prompt> In cholera epidemic which step should be first takenVaccination to all individuals immediatelyPrimary chemoprophylaxisCure with tetracyclineSafe water supply and sanitation  <response>: Cholera is an acute diarrheal disease caused by Vibrio cholerae.I.P.-1-2 daysFirst step in epidemic of cholera: Verification of diagnosisFirst line treatment of choice: water and electrolyte replacement.In the given question, safe water supply and sanitation should be the 1 st step to decrease mortality from cholera. Also knowStool appearance of cholera: Rice watery stool Chemoprophylaxis of cholera: Tetracycline 500mg BID for 5 days.Drug of choice for cholera:Adults: Doxycycline 300 mg stat.Children: Cotrimoxazole 5mgkg BID for 3 daysPregnant female: Furazolidone 100mg QID for 3 days 