Japanese Encephalitis Photos


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WARNING: Some of these photos might be unsuitable for children. Viewing discretion is advised.

Photos of the Disease

West Nile Virus (WNV) is a member of the Japanese encephalitis virus antigenic complex, which includes several medically important viruses associated with human encephalitis: Japanese encephalitis, St. Louis encephalitis, Murray Valley encephalitis, and Kunjin, an Australian subtype of WNV.

A few samples from the Public Health Image Library

Photomicrograph of Haemophilus influenzae using immunofluorescence.

Using a histochemical technique in processing this tissue specimen, this image reveals the presence of the West Nile virus.
Source: PHIL Photo ID# 12793

Blood agar plate culture of Haemophilus influenzae.

This photomicrograph revealed some of the histopathologic changes in this specimen of equine brain tissue revealing the perivascular inflammation associated with this West Nile virus (WNV) infection.
Source: PHIL Photo ID# 12792

Photomicrograph of Haemophilus influenzae as seen using a Gram stain technique.

This image depicts the “egg raft” deposited by a female Culex quinquefasciatus mosquito. The female C. quinquefasciatus mosquito is known as one of the many arthropodal vectors responsible for spreading the West Nile virus to human beings through their bite when obtaining a blood meal.
Source: PHIL Photo ID# 12549

Photo of a Mosquito that Spreads this Disease

The virus causing Japanese encephalitis is transmitted by mosquitoes belonging to the Culex tritaeniorhynchus and Culex vishnui groups, which breed particularly in flooded rice fields. The virus circulates in ardeid birds (herons and egrets). Pigs are amplifying hosts, in that the virus reproduces in pigs and infects mosquitoes that take blood meals, but does not cause disease. The virus tends to spill over into human populations when infected mosquito populations build up explosively and the human biting rate increases (these culicines are normally zoophilic, i.e. they prefer to take blood meals from animals). Courtesy of WHOexternal icon

Culex mosquito laying eggs

From the Division of Vector-borne Infectious Diseases
Photo of Culex mosquito laying eggs.

More mosquito photos can be found on the Public Health Image Library site.

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Images of People Affected by the Disease

None available.

Additional Images and Regulations

Page last reviewed: March 10, 2017