Contamination of water sewage is indicated by cysts of

Options

A. Escherichia
B. Entamoeba
C. Pseudomonas
D. Leishmania

Explanation

To solve the question regarding which cyst indicates contamination of water sewage, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which cyst indicates contamination of water sewage. We need to identify the organism associated with water contamination.

2. **Analyzing the Options**: The options given are:
- Escherichia
- Antamoeba
- Sodomonas
- Leishmania

3. **Identifying Relevant Organisms**:
- **Escherichia**: This refers to Escherichia coli, which is a bacterium commonly found in the intestines of humans and animals. While it can indicate fecal contamination, it does not form cysts.
- **Antamoeba**: This refers to Entamoeba histolytica, which is known to form cysts and can contaminate water sources, leading to infections.
- **Sodomonas**: This likely refers to Pseudomonas, which is a genus of bacteria but does not form cysts.
- **Leishmania**: This is a protozoan parasite that causes leishmaniasis and does not indicate water sewage contamination in the same way.

4. **Focusing on Antamoeba**:
- Entamoeba histolytica forms cysts that can survive outside the host and contaminate water supplies, leading to infections when ingested. This organism is specifically known for causing amoebiasis, which is an intestinal infection resulting from ingesting its cysts.

5. **Conclusion**: Based on the analysis, the cyst that indicates contamination of water sewage is from **Antamoeba** (specifically Entamoeba histolytica).

### Final Answer:
The contamination of water sewage is indicated by cysts of **Antamoeba** (Entamoeba histolytica).

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