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Tularemia
Tularemia
Clinical features Tularemia is a zoonotic infection caused by Francisella tularensis, a highly contagious, nonmotile Gram-negative bacillus.1โ5 Five subspecies exist, but only F. tularensis subsp. tularensis and F. tularensis subsp. holarctica are
The diagnosis of tularemia is usually confirmed by serology or culture of the organism.2 F. tularensis is not demonstrable in routinely stained sections. It may, however, be detected in histologic material by direct immunofluorescence, PCR or immunohistochemistry; the latter, however, is not commercially available.2,3,23โ25