A pathogen is an infectious agent that causes illness to the host. These are commonly attributed to be bacteria and viruses.
They can also be simple organisms, such as Naegleria fowleri [the uncommon brain eating ameoba].
Basicallly, they are germs that are capable of causing disease/illnesses. Bacteria, viruses'.
Pathogens are any microorganisms capable of producing disease. Pathos (disease) + geinen (to produce), both Greek.
Pathogens are micro-organisms that cause disease. They include a few types of bacteria, viruses, protozoa, and other organisms. Some pathogens are often found in water, frequently as a result of fecal matter from sewage discharges, leaking septic tanks, and runoff from animal feedlots.
Infections by pathogens can occur through such non-drinking water means as recreational activities (e.g., swimming and water slides), person-to-person contact (e.g., diaper changing), and consumption of food.
