Define the following terms Pathogen, virus, vector, mastitis?

- Pathogen: A pathogen is a microorganism, such as a bacterium, virus, fungus, or parasite, that causes disease in its host.

- Virus: A virus is a small infectious agent that can only replicate inside the cells of living organisms. Viruses can cause a variety of diseases in humans, animals, and plants.

- Vector: In the context of disease transmission, a vector is an organism, typically an insect or other arthropod, that transmits pathogens from one host to another. Vectors can carry and transmit diseases such as malaria, dengue fever, and Lyme disease.

- Mastitis: Mastitis is an inflammation of the mammary gland in mammals, typically caused by a bacterial infection. It is a common condition in dairy cows and can result in decreased milk production and quality. Mastitis can also occur in humans, although it is less common.

Pathogen: A microorganism or other agent that causes disease in a host organism.

Virus: A microscopic parasite that can only replicate inside the living cells of a host organism. Viruses are not considered to be living organisms, as they do not have their own metabolism or the ability to reproduce independently.

Vector: An organism that transmits a pathogen from one host to another. Vectors can be insects, such as mosquitoes or ticks, or animals, such as rodents or dogs.

Mastitis: An inflammation of the mammary gland, usually caused by a bacterial infection. Mastitis is most commonly seen in breastfeeding women, but can also occur in cows and other animals.