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Typhoid fever in human beings is caused by
ASalmonella typhi
BEntamoeba histolytica
CStreptococcus pneumoniae
DPlasmodium vivax
Answer & Solution
Correct answer: A. Salmonella typhi
1. Typhoid is a bacterial disease of the intestinal tract.
2. The pathogen responsible is Salmonella typhi.
3. It enters through food and water contaminated with the bacterium.
4. From the small intestine it migrates to other organs through the blood.
_Source: NCERT Class 12 Biology Ch7 'Human Health and Disease', section 7.1_
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