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9261

PHIL Image 9261

ID#:9261
Description:This 2006 photograph depicted a female Aedes aegypti mosquito while she was in the process of acquiring a blood meal from her human host, who in this instance, was actually the biomedical photographer, James Gathany, here at the Centers for Disease Control. The feeding apparatus consisted of a sharp, orange-colored “fascicle” that was covered in a soft, pliant sheath called the "labellum” while not feeding. The labellum was shown here retracted as the sharp "stylets" contained within pierced the host's skin surface, thereby, allowing the insect to obtain its blood meal. The orange color of the fascicle was due to the red color of the blood as it migrated up the thin, sharp translucent tube. Note the distended abdominal exoskeleton, which being translucent, allowed the color of the ingested blood meal to be visible.

Dengue (DF) and Dengue hemorrhagic fever (DHF) are primarily diseases of tropical and sub-tropical areas, and the four different Dengue serotypes (DEN-1, DEN-2, DEN-3, and DEN-4), are maintained in a cycle that involves humans and the Aedes mosquito. However, Aedes aegypti, a domestic, day-biting mosquito that prefers to feed on humans, is the most common Aedes species. Infections produce a spectrum of clinical illness ranging from a nonspecific viral syndrome to severe and fatal hemorrhagic disease. Important risk factors for DHF include the strain of the infecting virus, as well as the age, and especially the prior Dengue infection history of the patient.

This female’s abdomen had become distended due to the blood meal she was ingesting, imparting the red coloration to her translucent abdominal exoskeleton.

High Resolution:Right click here and select "Save Target As..." for hi-resolution image (12.62 MB)
Content Providers(s):CDC/ Prof. Frank Hadley Collins, Dir., Cntr. for Global Health and Infectious Diseases, Univ. of Notre Dame
Creation Date:2006
Photo Credit:James Gathany
Links:
  • CDC – Nat. Cntr. For Infectious Diseases; Div. of Vector-Borne Infectious Dieases; Dengue Fever
    Categories:
    CDC Organization

    MeSH
    tree picture Diseases
    tree picture tree picture Virus Diseases
    tree picturetree picture tree picture Arbovirus Infections
    tree picturetree picturetree picture tree picture Dengue
    tree picturetree picturetree picturetree picture tree picture Dengue Hemorrhagic Fever
    tree picturetree picture tree picture RNA Virus Infections
    tree picturetree picturetree picture tree picture Flaviviridae Infections
    tree picturetree picturetree picturetree picture tree picture Flavivirus Infections
    tree picturetree picturetree picturetree picturetree picture tree picture Dengue
    tree picturetree picturetree picturetree picturetree picturetree picture tree picture Dengue Hemorrhagic Fever
    tree picturetree picturetree picture tree picture Hemorrhagic Fevers, Viral
    tree picturetree picturetree picturetree picture tree picture Dengue
    tree picture Organisms
    tree picture tree picture Animals
    tree picturetree picture tree picture Invertebrates
    tree picturetree picturetree picture tree picture Arthropods
    tree picturetree picturetree picturetree picture tree picture Insects
    tree picturetree picturetree picturetree picturetree picture tree picture Diptera
    tree picturetree picturetree picturetree picturetree picturetree picture tree picture Culicidae
    tree picturetree picturetree picturetree picturetree picturetree picturetree picture tree picture Aedes
    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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    This page last reviewed: Mar. 18 2005
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