Add Yahoo as a preferred source to see more of our stories on Google. A digitally colorized image depicts Group A Streptococcus (GAS), Streptococcus pyogenes bacteria on the surface of a human white ...

The itching, redness and swelling of an allergic reaction are caused by mast cells—the vigilant first responders of the immune system that spring into action with histamine-filled granules in response ...

A rare, deadly, flesh-eating bacteria is on the rise in Japan, with hundreds of people infected. Over 1,000 cases of streptococcal toxic shock syndrome (STSS) were reported in Japan in the first six ...

Increased levels of Streptococcus anginosus, a common type of bacteria that usually lives in the mouth and gut, was found in the gut of recent stroke survivors in Japan. A common bacteria usually ...

Strep infections are most well known for causing strep throat, which can be treated with antibiotics. But this type of bacteria can also cause more serious illnesses—even flesh-eating infections. Here ...

Scientists have developed a green antibiotic alternative to treat the deadly pathogen Streptococcus iniae in hybrid striped bass, the fourth most farmed finfish in the United States, according to a ...

Although the same bacteria can sometimes cause them, they're different conditions. Tonsillitis occurs when a virus or bacterium causes an infection in the tonsils (the soft tissue lumps at the back of ...

Pneumonia is a disease that burdens the health care system with more than 1.2 million emergency room visits each year and more than 41,000 adult deaths in the United States. Worldwide, more than one ...