Medical microbiology is the study of biological tissues in a microscope, and how they relate to medical disorders or diseases. A medical microbiologist is a physician who interprets the results of laboratory tests in order to identify viruses, fungi, bacteria and parasites – the microbes that cause diseases. These microbes are studied for their risk of causing disease and their effect on the immune system.

Doctor density varies by specialty and location. The United States has 107 practicing medical microbiologists. Broken out by state, medical microbiology doctor density in Arizona is 6, in Arkansas is 1, in California is 15, in Colorado is 7, in Connecticut is 3, in District of Columbia is 4, in Florida is 21, in Georgia is 3, in Hawaii is 1, in Illinois is 10, in Indiana is 4, in Iowa is 6, in Kansas is 1, in Kentucky is 4, in Louisiana is 3, in Maine is 3, in Maryland is 5, in Massachusetts is 5, in Michigan is 3, in Minnesota is 6, in Mississippi is 1, in Missouri is 4, in Nebraska is 2, in New Hampshire is 1, in New Jersey is 4, in New Mexico is 1, in New York is 7, in North Carolina is 25, in North Dakota is 1, in Ohio is 8, in Oklahoma is 1, in Oregon is 3, in Pennsylvania is 3, in Rhode Island is 1, in South Carolina is 1, in Tennessee is 6, in Texas is 15, in Utah is 4, in Vermont is 1, in Virginia is 2, in Washington is 4, and in Wisconsin is 7.