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This photomicrograph reveals the presence of Rickettsia prowazekii bacteria in a yolk sac smear specimen, which had been processed using the Macchiavello staining technique. R. prowazekii is responsible for causing the human disease known as epidemic typhus, and is transmitted to humans by way of the bite from the human body louse, Pediculus humanus var. corporis, which is pictured in PHIL 9203 and 9203.
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Content Providers(s):CDC/ Cornelius B. Philip, National Institute of Allergy and Infectious Diseases, Rocky Mountain Lab., Hamilton, Montana
Creation Date:1965
Photo Credit:
CDC Organization
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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.