MICROANATOMY

Detailed explanation-1: -A variety of microorganisms can cause disease. Pathogenic organisms are of five main types: viruses, bacteria, fungi, protozoa, and worms.

Detailed explanation-2: -A pathogen is a micro-organism that has the potential to cause disease. An infection is the invasion and multiplication of pathogenic microbes in an individual or population. Disease is when the infection causes damage to the individual’s vital functions or systems.

Detailed explanation-3: -Pathogens cause illness to their hosts through a variety of ways. The most obvious means is through direct damage of tissues or cells during replication, generally through the production of toxins, which allows the pathogen to reach new tissues or exit the cells inside which it replicated.

Detailed explanation-4: -Bacteria. Bacteria are microscopic pathogens that reproduce rapidly after entering the body. Viruses. Smaller than bacteria, a virus invades a host cell. Fungi. There are thousands of species of fungi, some of which cause disease in humans. Protists. Parasitic worms. 21-Aug-2020