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MMWR Morb Mortal Wkly Rep. 2015 Dec 4;64(47):1317-8. doi: 10.15585/mmwr.mm6447a4.

Notes from the Field: Increase in Human Cases of Tularemia--Colorado, Nebraska, South Dakota, and Wyoming, January-September 2015.

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Tularemia is a rare, often serious disease caused by a gram-negative coccobacillus, Francisella tularensis, which infects humans and animals in the Northern Hemisphere. Approximately 125 cases have been reported annually in the United States during the last two decades. As of September 30, a total of 100 tularemia cases were reported in 2015 among residents of Colorado (n = 43), Nebraska (n = 21), South Dakota (n = 20), and Wyoming (n = 16) (Figure). This represents a substantial increase in the annual mean number of four (975% increase), seven (200%), seven (186%) and two (70%) cases, respectively, reported in each state during 2004-2014.

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