Pathogens contain a unique type of protein, called ________ which causes diseases in our body.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a specific type of protein found in pathogens that causes diseases in our body.

2. **Identifying the Term**: In the context of biology, particularly in immunology, the term that describes a unique type of protein found in pathogens is "antigen."

3. **Definition of Antigens**: Antigens are foreign substances that induce an immune response in the body. They are typically proteins or polysaccharides found on the surface of pathogens like bacteria and viruses.

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