What is a pathogen? and how does it cause disease?

Pathogens are microorganisms that cause disease. They may be bacteria, viruses, protists or funghi. They can infect animals and plants, causing a wide range of diseases. 

Pathogens, such as bacteria and viruses cause disease in a number of ways. Bacteria divide rapidly by splitting in two (via binary fission). They may produce toxins that affect your body and make you feel ill. Sometimes they directly damage cells. Viruses take over the cels of you body. They live and reproduce inside the cells, damaging and destroying them. 

HP
Answered by Hugh P. Biology tutor

6448 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

Why is the overuse of antibiotics dangerous?


How does Meiosis increase variation?


Outline the differences between arteries and veins? (6) marks- 3 for each


Why is diffusion important in plants and animals? Give examples


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences