Infectious diseases are caused by microscopic organisms commonly called germs. Physicians refer to these disease-causing organisms as pathogens. Pathogens that infect humans include a wide variety of bacteria, viruses, fungi, protozoans, and parasitic worms. In addition, it has been theorized that some proteins called prions may cause infectious diseases.
Showing posts with label INFECTIOUS DISEASE. Show all posts
Showing posts with label INFECTIOUS DISEASE. Show all posts
Wednesday, March 30, 2011
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