Bacillus Short Question And Answers
Question 1. Morphology of bacillus anthracis.
Answer:
- Bacillus anthracis is
- Gram-positive
- Non-acid fast.
- Non-motile.
- Spore forming.
- Capsulated – polypeptide in nature.
- Size – Large, 3-10 Elm x 1 – 1.6 Elm.
- Shape – Rectangular.
- Spores – Refractile, oval, and central in position.
- Spores are of same width as the bacillary body.
- Thus, they do not cause bulging.
Bacillus anthracis Arrangement:
1. In infected tissues:
- Bacilli are found singly, in pairs or in short chains.
- The entire chain is surrounded by a capsule.
2. In culture.
- In bacilli are arranged end-to-end in long chains.
- The ends of the bacilli are truncated or often con-cave and somewhat swollen.
- This gives it a bombastic appearance.
Question 2. Cultivation of Bacillus Anthracis.
Answer:
Bacillus anthracis is an aerobe and facultative anaerobe.
- Grows in a temperature range of 12-45°C.
Question 3. Malignant pustule.
Answer:
It is a feature of cutaneous anthrax
- Site of entry
- Abraded skin.
Affected sites involved are:
- Face
- Neck
- Hands
- Back
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The persons involved are:
- Farmers
- Persons handling dead bodies.
Malignant pustule Features:
- The lesion starts as a papule which becomes a vesicle containing fluid called a pustule.
- The acute inflammatory reactions lead to congestion and edema of the area with central necrotic lesions.
- This lesion is called a malignant pustule.
Question 4. Types of diseases caused by B. Anthracis.
Answer:
There are three clinical types of diseases caused by B. Anthracis based on the route of infection.
