Question
In which of the following diseases is the source of infection also the reservoir of infection?
| A. |
Hookworm infection |
| B. |
Cholera |
| C. |
Tetanus |
| D. |
Typhoid |
Show Answer
|
Correct Answer » C Explanation |
 |
The source of infection and reservoir of infection are not always the same.
In tetanus:
- Reservoir: Soil
- Source of infection: Soil
- Therefore, the source and reservoir are the same.
The supplied notes specifically state that in tetanus, soil is both the source and reservoir of infection.
Why the other options are incorrect
A. Hookworm infection
- Reservoir: Man
- Source of infection: Soil
- Therefore, source and reservoir are different.
B. Cholera
- Reservoir: Humans
- Source: Infected person or contaminated food/water
- Therefore, source and reservoir are not necessarily the same.
D. Typhoid
- Reservoir: Man, including cases and carriers
- Source: Feces/urine of patients or contaminated food, milk, or water
- Therefore, source and reservoir are different.