PEGGY GREB / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY PEGGY GREB / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
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Microbiology research. Microbiologists examining petri dishes for the growth of Salmonella bacteria. Salmonella bacteria are responsible for causing a number of human diseases, including typhoid fever, paratyphoid fever, and the food-borne illness salmonellosis. This work is being done by the US Meat Animal Research Center (USMARC).
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