Gram Positive Bacilli
All true about anthrax except;
|A||Mc Fadyean’s reaction shows capsule|
|B||Less than 100 spores can cause disease|
|C||Gram stain shows organism with bulging spores|
|D||Sputum microscopy can aid in diagnosis|
Gram stain shows organism with bulging spores
a. Blood films of infected animals on staining with polychrome methylene blue show an amorphous purplish material around the chains of bacilli, representing the polypeptide capsule. This is called Mc Fadyean’s reaction.
b. Human pulmonary infection can occur by inhalation of less than 100 spores
c. Spores of B.anthracis are as broad as the bacterium and do not swell the bacterium.
d. Blood or sputum smears can demonstrate the gram positive rods for diagnosis in pulmonary anthrax, also called wool sorter’s disease