Answer:
The characteristic features of each pathogen are its mode of transmission, its mechanism of replication, its pathogenesis or the means by which it causes disease, and the response it elicits. We will focus here on the immune responses to these pathogens.
*1. Bacteria. Bacteria are microscopic pathogens that reproduce rapidly after entering the body.
*2. Viruses. Smaller than bacteria, a virus invades a host cell. ...
*3. Fungi. There are thousands of species of fungi, some of which cause disease in humans.
*4. Parasitic worms.
Explanation:
