Bacteria

Pinworms–small worms that infect the intestines–are the most common worm infection in the United States. Although all people are over 99.9% genetically identical, the small amount of diversity that does...

Leprosy is a chronic, disabling disease caused by a bacterium (Mycobacterium leprae) that infects only humans and armadillos. The disease affects the skin and peripheral nerves, leading to sores, numbness...

Each of us is made up of about 50 trillion cells, which is pretty mind-blowing until you consider the number of microbial cells living on or in each of us....

Not all bacteria are bad.   Sure, there are plenty of nasty bugs that can make life pretty unpleasant; the ones that cause leprosy, anthrax, and cholera immediately come to...