MHT CET · BIOLOGY · STD 12 - 10. Human Health and Diseases
Salmonella typhi are ___________ bacteria.
- A flagellate Gram +ve
- B flagellate Gram - ve
- C non-flagellate Gram - ve
- D non-flagellate Gram +ve
Answer & Solution
Correct Answer
(B) flagellate Gram - ve
Step-by-step Solution
Detailed explanation
Typhoid is an acute infection of intestine. It is caused by Salmonella typhi. These are Gram -ve bacteria found in intestinal lumen of infected preson. Pathogenicity is due to "O"-antigen, a lipopolysaccharide (LPS), present on surface coat. Flagella contains "H"- antigen.
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