Which of the following pairs correctly matches a disease and a pathogen causing it ?

Options

A. Typhoid - Salmonella typhi
B. Pneumonia - Haemophilus pneumoniae
C. Malaria - Ascaris lumbricoides
D. Ringworm - Entamoeba histolytica

Explanation

To solve the question of which pair correctly matches a disease with its causative pathogen, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Diseases and Pathogens in Each Option**:
- We need to look at each option provided and identify the disease and the pathogen mentioned.

2. **Evaluate Each Option**:
- **Option 1**: Typhoid - Salmonella typhi
- Typhoid is indeed caused by Salmonella typhi. This is a correct match.
- **Option 2**: Pneumonia - (Pathogen not specified in the transcript)
- Pneumonia can be caused by multiple pathogens, primarily Streptococcus pneumoniae and Haemophilus influenzae. If a specific pathogen was mentioned and it was incorrect, then this option is not valid.
- **Option 3**: Malaria - Ascaris lumbricoides
- Malaria is caused by Plasmodium species, not Ascaris lumbricoides (which is a nematode causing ascariasis). This is a mismatch.
- **Option 4**: Ringworm - Entamoeba histolytica
- Ringworm is a fungal infection caused by dermatophytes, while Entamoeba histolytica causes amoebic dysentery. This is also a mismatch.

3. **Conclusion**:
- After evaluating all options, the only correct match is **Option 1: Typhoid - Salmonella typhi**.

### Final Answer:
The correct pair that matches a disease with its pathogen is **Typhoid - Salmonella typhi**.