The cook Mary Mallon was a carries of which of the following diseases ?

Options

A. The disease caused by Salmonella typhi
B. The disease caused by streptococcus penumoniae.
C. The disease caused by Staphylococcus aureus.
D. The disease caused by Treponema pallidum.

Answer

To solve the question regarding the disease carried by Mary Mallon, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four options related to different diseases:
- A) Disease caused by Salmonella typhi
- B) Disease caused by Streptococcus pneumonia
- C) Disease caused by Staphylococcus aureus
- D) Disease caused by Treponema pallidum

2. **Understand Mary Mallon's Background**: Mary Mallon, also known as "Typhoid Mary," was a cook who was identified as an asymptomatic carrier of a disease. This means she did not show symptoms but could still spread the disease to others.

3. **Research the Diseases**:
- **Salmonella typhi**: This bacterium causes typhoid fever, which is a serious illness transmitted through contaminated food and water.
- **Streptococcus pneumonia**: This bacterium is known for causing pneumonia.
- **Staphylococcus aureus**: This bacterium can cause a variety of infections, including skin infections and pneumonia.
- **Treponema pallidum**: This bacterium is responsible for syphilis, a sexually transmitted infection.

4. **Match Mary Mallon with the Disease**: Since Mary Mallon was known to be a carrier of typhoid fever, we can conclude that the disease she carried is caused by Salmonella typhi.

5. **Select the Correct Option**: Based on the information, the correct answer is:
- **A) Disease caused by Salmonella typhi** (typhoid fever).

### Final Answer:
Mary Mallon was a carrier of the disease caused by Salmonella typhi, which is typhoid fever.

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