A sulpha drug which is used in the treatment of bacillary dysentery is

Options

A. Sulphathiazole
B. Sulphaguanidine
C. Sulphadiazine
D. Sulphamethazine

Answer

To solve the question regarding the sulpha drug used in the treatment of bacillary dysentery, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Bacillary Dysentery**:
- Bacillary dysentery is a type of dysentery caused by bacteria, specifically from the family Enterobacteriaceae. It leads to inflammation of the intestines, resulting in symptoms like severe diarrhea, often with blood and pus.

2. **Identify the Treatment**:
- The treatment for bacillary dysentery often involves the use of sulpha drugs, which are a class of antibiotics that can inhibit bacterial growth.

3. **Recognize the Specific Sulpha Drug**:
- Among the sulpha drugs, Sulfa guanidine is specifically noted for its effectiveness against bacillary dysentery. It helps in reducing inflammation and treating the symptoms associated with the infection.

4. **Structure of Sulfa guanidine**:
- The structure of Sulfa guanidine includes a benzene ring with an NH2 (aniline) group, a sulfur moiety attached with a double bond to oxygen, and two NH2 groups. This structural information is relevant for understanding its chemical properties and mechanism of action.

5. **Conclusion**:
- Based on the understanding of the disease and the specific sulpha drug used for treatment, we conclude that the correct answer to the question is Sulfa guanidine.

### Final Answer:
The sulpha drug which is used in the treatment of bacillary dysentery is **Sulfa guanidine**.