Question

Which among the following is a pathogenic alga for humans?

• A. Cephaleuros
• B. Acanthopeltis
• C. Chlorella
• D. Prototheca

Hint:

Prototheca infection is rare but can occur, especially in people with weakened immune systems, leading to protothecosis.

Answer 1

The Correct Option is D

Prototheca is a genus of algae that is known to be pathogenic to humans. It can cause a rare infection known as protothecosis, which may affect various parts of the body, including the skin, eyes, and internal organs. This alga is a rare but recognized pathogen in immunocompromised individuals.

(1) Prototheca:
- It is a non-photosynthetic alga that can infect humans, particularly in individuals with weakened immune systems. It is typically found in contaminated water and soil.

(2) Why Other Options Are Incorrect:
- Cephaleuros (Option 1) is a genus of algae that causes plant diseases (like red rust) but is not pathogenic to humans.
- Acanthopeltis (Option 2) is not known to be a human pathogen.
- Chlorella (Option 3) is a green alga commonly used in food and health supplements and is not pathogenic to humans.

Conclusion: The pathogenic alga for humans among the options is Prototheca, which can cause infections, particularly in immunocompromised individuals.