2006.Prof. Frank Hadley Collins, Dir., Cntr. for Global Health and Infectious Diseases, Univ. of Notre Dame..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. Youll 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. The fascicle is composed of a pair of needle-sharp “stylets”. The larger of the two stylets, known as the “labrum”, when viewed in cross-section 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 females abdomen had become distended due to the blood meal she was ingesting, imparting the red coloration to her translucent abdominal exoskeleton.
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BY SHEKWOPEYELO
Global warming could significantly increase the risk of insect-borne diseases such as malaria and dengue in tropical regions, according to the Intergovernmental Panel on Climate Change (IPCC). The rising temperatures, driven by human-induced global warming, are set to worsen these health risks.
The United Nations Environment Programme (UNEP) predicts that by 2050, around 1,000 cities will experience average summer temperatures of 35°C, nearly tripling the current number. Without a reduction in greenhouse gas emissions, this could lead to more areas becoming breeding grounds for disease-carrying insects.
The United Nations has also reported a rapid rise in global sea levels over the past 3,000 years, driven by the melting of land ice and the expansion of seawater. This is another consequence of global warming, posing threats not only to the environment but also to public health.
