A Previously Healthy 23-Year-Old Man Comes to the Office Due

A previously healthy 23-year-old man comes to the office due to abrupt-onset high fever, chills, headache, and weakness that developed during a hiking and camping trip in New Mexico.  His initial symptoms were quickly followed by intensely painful swellings in the groin.  Physical examination shows tender and enlarged inguinal lymph nodes with overlying erythematous skin.  Blood cultures and fluid aspirated from the lymph nodes grow gram-negative coccobacilli, which resemble a closed safety pin on special staining.  Which of the following are the most likely source of this patient's infection?

A) Bats
B) Poultry
C) Rodents
D) Sheep
E) Swine

Correct Answer:

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