<prompt> Which is true about salmonella gastroenteritis?Always associated with blood and mucus in stoolsIs due to exotoxinMainly diagnosed by serological testingNone  <response>: Ans. is None In salmonella gasteroenteritis:- i Diarrhea is nonbloody option a is incorrect. ii It is due to invasion of bowel mucosa, not toxin mediated option b is incorrect. iii It is diagnosed by isolation of organism from stools option c is incorrect. iv Fever is one of the commoner symptom option d is incorrect. 