File:Rickettsia rickettsii.jpg

Rickettsia_rickettsii.jpg(297 × 278 pixels, file size: 17 KB, MIME type: image/jpeg)

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Summary

Description

Gimenez stain of tick hemolymph cells infected with Rickettsia rickettsii, the causative agent of Rocky Mountain spotted fever. R. rickettsii is a small bacterium that grows inside the cells of its hosts. These bacteria range in size from 0.2 x 0.5 micrometers to 0.3 x 2.0 micrometers. They are difficult to see in tissues by using routine histologic stains and generally require the use of special staining methods.

The genus Rickettsia is included in the bacterial tribe Rickettsieae, family Rickettsiaceae, and order Rickettsiales. This genus includes many other species of bacteria associated with human disease, including those in the spotted fever group and in the typhus group.
Date
Source Rocky Mountain Spotted Fever info page from the CDC.
Author CDC

Licensing

Public domain
This image is a work of the Centers for Disease Control and Prevention, part of the United States Department of Health and Human Services, taken or made as part of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain.

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Date/TimeDimensionsUserComment
current10:43, 10 April 2013297 × 278 (17 KB)HohumContrast

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