Question
Infection in humans due to micro-organism shown in the photomicrograph below is most commonly because of?
A. Contact.
B. Inhalation.
C. Infiltration.
D. Inoculation.
Show Answer
|
Correct Answer » B
Explanation
|
|
Ans:B. Inhalation
The micro-organism shown in the picture above represents Mycobacterium tuberculosis.(acid fast stain)
Mycobacterium tuberculosis
- It is a large nonmotile rod-shaped bacterium.It is an acid fast bacilli(will retain dyes when heated and treated with acidified organic compounds.)
- One acid-fast staining method for Mycobacterium tuberculosis is the Ziehl-Neelsen stain. When this method is used, the MTB smear is fixed, stained with carbol-fuchsin (a pink dye), and decolorized with acid-alcohol. The smear is counterstained with methylene-blue or certain other dyes. Acid-fast bacilli appear pink in a contrasting background.
- Mycobacterium tuberculosis is the etiologic agent of tuberculosis in humans.
- Infection in humans is most commonly because of Inhalation.
