Answer the following question given this paragraph: 

There are several types of pathogens that cause diseases in human beings. They include bacteria, viruses, fungi, and protozoa. The different types are described in Table below . The table also lists several diseases caused by each type of pathogen. Many infectious diseases caused by these pathogens can be cured with medicines. For example, antibiotic drugs can cure most diseases caused by bacteria.


Q: Bacteria, viruses, fungi, and protozoa are examples of what, the term for a disease-causing microorganism?


A:
pathogen