Mark Frederick Boyd
Encyclopedia
Mark Frederick Boyd was an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 Bacteriologist who discovered a shigella
Shigella
Shigella is a genus of Gram-negative, nonspore forming, non-motile, rod-shaped bacteria closely related to Escherichia coli and Salmonella. The causative agent of human shigellosis, Shigella causes disease in primates, but not in other mammals. It is only naturally found in humans and apes. During...

 species known as shigella boydii
Shigella boydii
Shigella boydii is a Gram-negative bacteria of the genus Shigella. Like other member of the genus, S. boydii is a non-motile, non-sporeforming, rod-shaped bacteria which can cause dysentery in humans through fecal-oral contamination....

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