Study reveals how some bacterial infections become chronic

In the early 1900s, a cook named Mary Mallon, better known as "Typhoid Mary," spread Salmonella Typhi, the causative agent of typhoid fever, to dozens of her patrons even though she showed no symptoms. Many people today harbor ...

Tests can reveal whether an antibody can turn into a killer

What makes a soldier switch sides? That is a really good question, especially when the soldier is an antibody that is supposed to defend the body against one of the world's most dangerous snake venoms but instead ends up ...

Why group A streptococci affect some people more severely

Group A streptococci are fairly common bacteria that can cause, among other things, strep throat or impetigo. However, if the bacteria become invasive, the situation can become very dangerous. In this case, the name sometimes ...

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