Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Human pathogens are disease-causing microorganisms, such as bacteria, viruses, fungi, or parasites that can infect and harm human beings. These pathogens can cause a wide range of illnesses and diseases.
Related terms
Infectious diseases: Illnesses caused by pathogenic microorganisms that can be transmitted from one person to another through direct contact, contaminated surfaces, or vectors like mosquitoes.
Antibiotics: Medications used to treat bacterial infections by killing or inhibiting the growth of bacteria.