Bacterial & Viral Infections

• A to Z: Cat Scratch Disease

  Cat scratch disease is an infection caused by the bacterium Bartonella henselae. It comes from a scratch or bite of an infected cat, usually a kitten.

• A to Z: Otitis Media (Ear Infection)

  Learn more about otitis media, an infection of the middle ear.

• A to Z: Yeast Infection

  See: Candidiasis.

• Adenovirus

  Adenoviruses can infect the lining of the eyes, airways and lungs, intestines, urinary tract, and nervous system. They’re common causes of fever, coughs, sore throats, diarrhea, and pinkeye.

• Antibiotics

  Antibiotics are medicines that treat infections and other problems caused by bacteria. Here are the basics on what they can help with.

• Babesiosis

  Babesiosis is a rare illness that happens when tiny parasites infect red blood cells, usually after a bite from an infected tick.

• Bird Flu

  Learn about bird flu and its symptoms, causes, treatment, and prevention so you can help keep your family safe.

• Booster Shots

  The immune protection from a vaccine can fade over time. Booster shots and additional doses can help. Here’s how.

• Bronchiolitis

  Bronchiolitis is a common illness of the respiratory tract caused by an infection that affects tiny airways. The best treatment for most kids with bronchiolitis is time to recover and plenty of fluids.

• Bronchitis

  Bronchitis is an inflammation of the lining of the bronchial tubes. When a person has bronchitis, it may be harder for air to pass in and out of the lungs.