Share Science
Save to Folder
What is a pathogen?
A microorganism that causes disease.
Name four types of pathogens.
Bacteria, viruses, fungi, and parasites.
How do pathogens spread?
Through air, water, food, direct contact, or vectors.
What are bacteria?
Single-celled microorganisms that can multiply quickly.
Name one bacterial disease.
Tuberculosis, cholera, or salmonella.
How do bacteria make us feel ill?
By releasing toxins and damaging body tissues.
How are viruses different from bacteria?
Viruses are much smaller, not living, and need a host cell to reproduce.
Give one example of a viral disease.
Influenza, measles, or COVID-19.
What is a vaccine?
A substance containing weakened or dead pathogens (or their antigens) to stimulate the immune system.
What is a vector? Give an example.
An organism that spreads disease without being ill, e.g., mosquitoes spreading malaria.
