Sereny test is positive in -: (A) Entero-invasive E.coli, (B) Entero-pathogenic E.coli, (C) Entero-toxigenic E.coli, (D) Entero-aggregative E.coli
Answer is A. Ans. is 'a' i.e., Entero-invasive E. coliSereny 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.