It is true regarding the normal microbial flora present on the skin and mucous membranes that ?
Ans is 'a' i.e., It cannot be eradicated by antimicrobial agents . The normal microbial flora are more or less constant for each species and are broadly divided into residents and transients. The former constitute a constant population which cannot be completely removed permanently. - Ananthanarayan 7'''/e 599 . Because of low pH of stomach, it is viually sterile except soon after eating - Ananthanarayan 71/4 601 . With in 4-24 hours of bih an intestinal flora is established - Ananthanarayan r/e 600 . In the pharynx and trachea, flora is similar to that of mouth, while smaller bronchi and alveoli are normally sterile - Ananthanarayan 7th/e 600
It cannot be eradicated by antimicrobial agents
It is absent in the stomach due to the acidic pH
It establishes in the body only after the neonatal period
The flora in the small bronchi is similar to that of the trachea