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Leptospira interrogans, microscopic agglutination
leptospira-interrogans-microscopic-agglutination-lunn-sized
Leptospira interrogans, microscopic agglutination

    Photomicrograph of L interrogans in a microscopic agglutination test. The characteristic hooked ends (described as resembling "question marks" or "interrogation points," which give the species its name) are visible in nonagglutinated bacteria. Dark-field microscopy; original magnification, low power (4X).

Courtesy of the Department of Pathobiology, University of Guelph.