Conditions list medically reviewed by George Krucik, MD, MBA
Pharyngitis is inflammation of the pharynx, which is in the back of the throat. It's most often referred to simply as "sore throat" and is very common.
Strep throat is a bacterial infection that causes inflammation and pain in the throat. This common condition is caused by group A Streptococcus bacteria.
Tonsillitis can occur at any age and is a common childhood ailment. It is most often diagnosed in children from preschool age through their midteens.
Infectious mononucleosis, or mono, refers to a group of symptoms usually caused by the Epstein-Barr virus (EBV).
Acute HIV infection occurs soon after someone is infected with HIV. Learn about its symptoms, diagnosis, treatment, and prevention.
If left untreated, HIV can lead to AIDS. AIDS weakens your immune system to the point where it can no longer fight off disease and infection. Learn more.
Syphilis is a sexually transmitted infection caused by a type of bacteria known as Treponema pallidum. Syphilis can be challenging to diagnose.
Toxoplasmosis is an infection caused by a parasite. This parasite, called Toxoplasma gondii, can be found in cat feces and in undercooked meat.
Weil's disease is a severe form of the bacterial infection leptospirosis. Learn how to lower your risk of getting this potentially life-threatening illness.
Learn about the causes and symptoms of the West Nile virus.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.