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ID#:17221
Description:Under the low-power magnification of 10X of a digital Keyence scope , this photograph depicts the colonial growth displayed by Gram-negative Yersinia pestis bacteria, which were cultured on a MacConkey agar (MAC) medium, for a 48 hour time period, at a temperature of 37°C.
The cause of human plague, Yersinia pestis may be identified microscopically by examination of Gram, Wright, Giemsa, or Wayson's stained smears of peripheral blood, sputum, or lymph node specimen. Visualization of bipolar-staining, ovoid, Gram-negative organisms with a "safety pin" appearance permits a rapid presumptive diagnosis of plague.

If cultures yield negative results, and plague is still suspected, serologic testing is possible to confirm the diagnosis. One serum specimen should be taken as early in the illness as possible, followed by a convalescent sample 4-6 weeks or more after disease onset. See the link below for addition information on plague.

High Resolution: Click here for hi-resolution image (5.79 MB)
Content Providers(s):CDC/ Todd Parker, Ph.D., Assoc Director for Laboratory Science, Div of Preparedness and Emerging Infections at CDC
Creation Date:2014
Photo Credit:Todd Parker, Ph.D., Assoc Director for Laboratory Science, Div of Preparedness and Emerging Infections at CDC
Links:CDC – National Center for Emerging and Zoonotic Infectious Diseases (NCEZID); Division of Vector-Borne Diseases (DVBD); Plague
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.

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