How do new infectious diseases emerge?

What causes it? Neutropenia is often caused by cancer treatments such as chemotherapy and radiation. These treatments destroy cancer cells. But they can ... Ear infections are caused by bacteria or viruses in your middle ear, which is the part of your ear behind your eardrum. Most ear infections clear up within ... Jan 1, 2025 ... Some studies have found DNA from herpes simplex virus 1 and 2 (the viruses that cause cold sores and genital sores) more often in the brains of ... It's not always clear what causes encephalitis. When a cause is found, it's usually an infection or a problem with the immune system (the body's natural ... Mar 24, 2025 ... Most are caused by an infection in an oil-producing gland in your eyelid. You can also get a stye if you have blepharitis. This is a ... What causes them? Middle ear infections are caused by bacteria and ... This makes it a perfect place for germs to grow and cause an infection. What ... Diagnosing respiratory infections · Sputum test: You may be asked to provide a sample of mucus to be checked for bacteria. · Tuberculin skin test: A small ... Share ... Most urine infections in men are caused by germs (bacteria) which come from your own bowel. They cause no harm in your bowel but can cause infection if ... This review focuses on the relation between infection and chronic pain, with an emphasis on common viral and bacterial causes. Candida is a yeast (fungus) that causes mild disease, but in immunocompromised individuals it may cause life-threatening illness. (Image courtesy of the Centers ...