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Four groups of pathogen

Four groups of pathogen

Flowchart of viruses, bacteria, fungi and protists showing how each group characteristically damages its host

A pathogen is a microorganism or infectious particle that causes communicable disease. The four main groups are viruses, bacteria, fungi and protists.

6.3.4 Common infections and diseases Lesson

  1. GCSE
  2. /Biology
  3. /6.3.4 Common infections and diseases

Step-by-step lessons on OCR GCSE Biology 6.3.4 Common infections and diseases. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons