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ID#:724
Description:At a relatively-low magnification of 160X, this hematoxylin and eosin-stained splenic tissue sample revealed the histopathologic changes indicative of vasculitis and thrombosis associated with what was diagnosed as a case of fatal human plague.

Plague, caused by a bacterium called Yersinia pestis, is transmitted from rodent to rodent by infected fleas.

Plague is characterized by periodic disease outbreaks in rodent populations, some of which have a high death rate. During these outbreaks, hungry infected fleas that have lost their normal hosts seek other sources of blood, thus increasing the increased risk to humans and other animals frequenting the area.
Epidemics of plague in humans usually involve house rats and their fleas. Rat-borne epidemics continue to occur in some developing countries, particularly in rural areas. The last rat-borne epidemic in the United States occurred in Los Angeles in 1924-25. Since then, all human plague cases in the U.S. have been sporadic cases acquired from wild rodents or their fleas or from direct contact with plague-infected animals.

High Resolution: Click here for hi-resolution image (6.37 MB)
Content Providers(s):CDC/ Dr. Marshall Fox
Creation Date:1976
Photo Credit:
Links:CDC - National Center for Emerging and Zoonotic Infectious Diseases; Division of Vector-Borne Infectious Diseases; Plague Home Page
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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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