A protozoan parasite causing an STD that affects a quarter of a billion people yearly is fueled in part by its own viral symbiont. Antibiotics that simply kill the parasite are not the solution. When ...

Human norovirus and adenovirus, two major causes of viral gastroenteritis, can persist for extended periods inside free-living amoebas that are common in natural and engineered water systems. A newly ...

Specific immunity developed by mice against protozoan (Toxoplasma gondii and Besnoitia jellisoni) and bacterial (Listeria monocytogenes) infections was compared with nonspecific protection conferred ...

When humans have parasites, the organisms live in our bodies, co-opt our resources and cause disease. However, it turns out that parasites themselves can have their own co-habitants. Researchers from ...

Amoebae receive surprising support in defense against viruses: The bacteria they are infected with prevent them from being destroyed by giant viruses. Microbiologists have investigated how a virus ...

Vaccines are one of the most important tools we have in our defense against infectious diseases, but not everyone responds to vaccination in the same way. Parasites such as worms and viruses change ...

ATTEMPTS to discover the presence of a foreign organism in such diseases as tobacco-mosaic, tomatomosaic, leaf-roll of potato, and numerous other similar infectious diseases have been the concern of ...

QUESTION: I know germs can be sneezed and coughed onto other people, but do germs move by themselves, too? ANSWER: The word “germ” can mean a variety of different biological entities that cause ...