yf_-_female_aedes_aegytpi_mosquito_2.jpg

2006
Prof. Frank Hadley Collins, Dir., Cntr. for Global Health and Infectious
Diseases, Univ. of Notre Dame

This 2006 photograph depicted a female <i>Aedes
aegypti</i> 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. You’ll note the feeding
apparatus consisting of a sharp, orange-colored “fascicle”, which while not
feeding, is covered in a soft, pliant sheath called the "labellum”, which
retracts as the sharp stylets contained within pierce the host's skin surface,
as the insect obtains its blood meal. The orange color of the fascicle is due to
the red color of the blood as it migrates up the thin, sharp translucent tube.
Though out of focus in the background, note the droplet of newly ingested blood
that had been expelled, and dispersed from the distal abdominal tip merely due
to over-engorgement on the host’s blood.

As the primary vector responsible for
the transmission of the <i>Flavivirus</i> Dengue (DF), and Dengue hemorrhagic
fever (DHF), the day-biting <i>Aedes aegypti</i> mosquito prefers to feed on its
human hosts. <i>Ae. aegypti</i> also plays a major role as a vector for another
<i>Flavivirus</i>, "Yellow fever". Frequently found in its tropical environs,
the white banded markings on the tarsal segments of its jointed legs, though
distinguishing it as <i>Ae. aegypti</i>, 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...

Date::

2006/11/16 00:00

Filename::

yf_-_female_aedes_aegytpi_mosquito_2.jpg

Caption::

2006 Prof. Frank Hadley Collins, Dir., Cntr. for Global Health and Infectious Diseases, Univ. of Notre Dame This 2006 photograph depicted a female <i>Aedes aegypti</i> 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. You’ll note the feeding apparatus consisting of a sharp, orange-colored “fascicle”, which while not feeding, is covered in a soft, pliant sheath called the "labellum”, which retracts as the sharp stylets contained within pierce the host's skin surface, as the insect obtains its blood meal. The orange color of the fascicle is due to the red color of the blood as it migrates up the thin, sharp translucent tube. Though out of focus in the background, note the droplet of newly ingested blood that had been expelled, and dispersed from the distal abdominal tip merely due to over-engorgement on the host’s blood. As the primary vector responsible for the transmission of the <i>Flavivirus</i> Dengue (DF), and Dengue hemorrhagic fever (DHF), the day-biting <i>Aedes aegypti</i> mosquito prefers to feed on its human hosts. <i>Ae. aegypti</i> also plays a major role as a vector for another <i>Flavivirus</i>, "Yellow fever". Frequently found in its tropical environs, the white banded markings on the tarsal segments of its jointed legs, though distinguishing it as <i>Ae. aegypti</i>, 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.

Photographer::

Photographer: James Gathany

Format::

JPEG

Size::

289KB

Width::

540

Height::

400

References for:

group_4_presentation_2_-_yellow_fever