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9253

PHIL Image 9253

ID#:9253
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. When viewed in cross-section, the larger of the two needle-sharp stylets, known as the "labrum", takes on the shape of an inverted "V", and acts as a gutter, which directs the ingested host blood towards the insect's mouth.

As the primary vector responsible for the transmission of the Flavivirus Dengue (DF), and Dengue hemorrhagic fever (DHF), the day-biting Aedes aegypti mosquito prefers to feed on its human hosts. Ae. aegypti also plays a major role as a vector for another Flavivirus, "Yellow fever". Frequently found in its tropical environs, the white banded markings on the tarsal segments of its jointed legs, though distinguishing it as Ae. aegypti, are similar to some other mosquito species. Also note the lyre-shaped, silvery-white markings on its thoracic region as well, which is also a determining morphologic identifying characteristic.

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 (11.01 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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