# Pathogens

Pathogens are microorganisms that cause disease. They include bacteria, viruses, fungi, and parasites.

**What are Pathogens?**

## Types of Pathogens

- Bacteria: Single-celled organisms that can cause infections like strep throat and tuberculosis.
- Viruses: Smaller than bacteria, responsible for illnesses such as the flu and HIV.
- Fungi: Can cause infections like athlete’s foot and ringworm.
- Parasites: Organisms that live on or in a host, such as malaria and tapeworms.

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First Aid Glossary · https://cprcourseblacktown.au/glossary/pathogens · Australia Wide First Aid (RTO 31961).