An abscess is a collection of pus in any part of the body that causes swelling and inflammation and can include boils (or furuncles), carbuncles, cystic acne, and pilonidal cysts.

Category for sites about diseases caused by bacteria.

Mycoplasma is a genus of bacteria the cells of which lack a cell wall and are unaffected by many common antibiotics. Several species cause diseases in humans including M. pneumoniae, which is an important cause of atypical pneumonia and other respiratory disorders, and M. genitalium, which is believed to be involved in pelvic inflammatory diseases.

This category includes disorders caused by prions, which are infectious proteins. Examples of the transmissible spongiform encephalopathies they cause include Creutzfeldt-Jakob Syndrome, Bovine Spongiform Encephalopathy, Gerstmann-Straussler-Scheinker Disease, Kuru, Scrapie in sheep and goats, Chronic Wasting Disease of cervids, Transmissible Mink Encephalopathy, and Fatal Familial Insomnia.

Sepsis is a serious medical condition that is characterized by a whole-body inflammatory state developed as a response to microbes in the blood, urine, lungs, skin or other tissues.

Sites in this category serve the support needs of people with infectious diseases. Many individual diseases have their own specific support groups.
All sites listed are interactive and include message boards and chat areas for people with questions or concerns.

Vector borne diseases are those that humans acquire through the bite of or other exposure to an arthropod (insect, mite, or tick).

Zoonoses or zoonotic diseases are those which can be transmitted directly from animals to humans, infection that can be acquired indirectly from the environment by humans from animals, and diseases which have an animal reservoir, but require an arthropod (insect, mite, or tick) to transmit the disease to humans. Zoonoses or zoonotic diseases are all the diseases collectively as described above. A single disease, such as rabies, is called a zoonosis or zoonotic disease.