Question

Who discovered the pathogen for the first time?

Answer 1

A pathogen is an organism that causes disease in its host, with virulence referring to the severity of the disease symptoms. Pathogens include viruses, bacteria, and unicellular and multicellular eukaryotes, and are taxonomically diverse.

Complete answer:
In biology, a pathogen is any organism that can cause disease in the broadest sense. An infectious agent, or simply a germ, is another name for a pathogen.
In the 1880s, the term pathogen was coined. Dr. Robert Koch, a German physician, and microbiologist was the first to discover pathogens are disease-causing microorganisms.
A virus, bacterium, protozoan, prion, viroid, or fungus are examples of infectious microorganisms or agents. Small animals, such as worms or insects, can also spread disease or cause it. In common parlance, however, these animals are referred to as parasites rather than pathogens.
Microbiology is the scientific study of microscopic organisms, such as microscopic pathogenic organisms, whereas parasitology is the study of parasites and the organisms that host them.
Pathogens can infiltrate a host through a variety of routes. The main pathways have varying episodic time frames, but the soil has the longest or most persistent potential for regeneration. Pathogenic diseases are diseases that are caused by infectious agents in humans. Pathogens are not the only cause of disease; other factors include toxins, genetic disorders, and the host's immune system.

Thus, Dr. Robert Koch discovered the pathogen for the first time.

Note:
Pathogenicity refers to a pathogen's ability to cause disease. In terms of meaning, pathogenicity and virulence are similar, but some authorities have distinguished the former as a qualitative term, whereas the latter is quantitative. According to this criterion, an organism can be pathogenic or non-pathogenic in a given situation, but not "more pathogenic" than another.