A well-accepted principle in the animal kingdom—from wasps to deer—is that creatures already occupying a habitat nearly always prevail over competitors from the same species that arrive later. Such ...

Streptococcus pneumoniae is a main cause of bacterial pneumonia worldwide. It can also cause ear and sinus infections and, in ...

Streptococcus pyogenes, which is often called group A Streptococcus, infects people around the world. While estimates vary, these infections could be responsible for the deaths of over half a million ...

Group B streptococcus, or group B strep, is a common type of bacteria that lives in some adults and children. It is not usually dangerous, but infection with this bacteria may be more serious in ...

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.

Group A streptococci pyogenes. It is the cause of skin infections (impetigo), abscesses, bronchopulmonary infections, a form of sore throat which can develop into complications such as acute rheumatic ...