All are true about enterohemorrhagic E.coli Except?
Ans. is 'a' i.e., Sereny test positive . Sereny test is positive in Enteroinvasive E. coli (EIEC) not in Enterohemorrhagic E. coli (EHEC). . EHEC can cause :- i) Severe diarrhea ii) Hemorrhagic colitis iii) Hemolytic uremic syndrome . It produces verocytotoxin (VT) or shiga like toxin (SLT). Sereny test . Sereny test is done for EIEC and shigella. . In this test, instillation of a suspension of freshly isolated ETEC or shigella into the eyes of guinea pigs leads to mucopurulent conjuctivitis and severe keratitis.
Sereny test positive
May cause diarrhoea
Can cause hemolytic uremic syndrome
Verocytotoxin is produced