Louse-borne Typhus — photos

Symptoms and syndromes in photos

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Body louse.

Photo 1. Body louse.

The body louse Pediculus humanus transmits typical epidemic typhus due to Rickettsia prowazeki, and Trench Fever. Rickettsial infection is cosmopolitan. The use of DDT for disinfectation of louse-infested communities is a primary control measure in epidemic situations. (x 10)

Ultrastructure of Rickettsia prowazeki.

Photo 2. Ultrastructure of Rickettsia prowazeki. Electron micrographs show that the rickettsial organisms have structural affinities to the bacteria, (x 55 000)

Rash of typhus in an Ethiopian

Photo 3. Rash of typhus in an Ethiopian. The generalised macular or maculopapular rash is similar in all types of rickettsial infections. The discrete rash shown here has a typical purplish colour. 

Peripheral gangrene in severe typhus.

Photo 4. Peripheral gangrene in severe typhus. One of the characteristic features of typhus is the severe toxicity of the infection. Gangrene of feet and hands occasionally occurs. 

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