Disease Causing Organisms - Virus, Bacteria and others

What are Pathogens?

Pathogens are microorganisms or agents that cause disease in their host organisms. They can be biological entities such as bacteria, viruses, fungi, protozoa, and parasites. These microorganisms have the ability to invade the host's tissues, multiply, and disrupt normal physiological processes, leading to the development of a disease.
Different pathogens have different mechanisms of infection and modes of transmission. For example, bacteria like Escherichia coli can cause infections when ingested through contaminated food or water, viruses like Influenza can be transmitted through respiratory droplets, and parasites like Plasmodium species which are the causative agents of malaria can be transmitted through the bites of infected mosquitoes.