Question

Name a disease in which viruses, bacteria, and protozoans can be the causal agents.

Answer 1

Causal agents:

1. These are the pathogenic organisms that are the causes of any disease.
2. These include bacteria, fungi, viruses, protozoans, parasitic worms, and insects.

Diarrhea is a disease that is caused by various causal agents including viruses, bacteria, and protozoans. All of the following cause diarrhea:

1. Hepatitis virus (Virus).
2. Escherichia coli (Bacteria).
3. Entamoeba histolytica (Protozoan).