In which of the following organism the capsule does not act as a virulence factor?: (A) H. influenzae, (B) Strept pneumoniae, (C) N. meningitidis, (D) Bordetella pertussis
Answer is D. Ans. is 'd' i.e., Bordetella pertussisRef: (Harrison, 19th/e, p. 1021 and Ananthanarayan, 9th/e, p. 333)Capsule of B. pertussis is not virulence factor of pertussis as Pertussis toxin (PT) - Most imp/important. Virulence factor.