There
are many insects that have a big role in creating and transmitting many
medically important Microorganisms. These vectors can transmit infectious
diseases between humans or from animals to humans. Most of these vectors are
blood sucking insects, which get a disease producing microorganism during
feeding on the blood of an infected host whether a human or an animal, and
after that inject the disease into a new host in another feeding meal ( WHO |
Vector-borne diseases) .The best known disease vectors are Mosquitoes,
ticks, sandflies, fleas, flies and triatomine bugs. This article is going to
talk mainly about the black flies. [1]
The black fly is a member of the family
Simuliidae of the Culicomorpha infraorder. Scientists have discovered over than
2.200 species of black flies among them 15 species are extinct. The black flies
are divided into two subfamilies: the Parasimuliinae
and the Simuliinae (Adler, Peter H.; Crosskey, Roger W. (2017)). Most kinds of
black flies feel on the blood of mammals including humans. However, male black
flies feed on nectar, they are often small and black or gray which short legs. Black
flies spread several diseases including river blindness.[2]
Black flies are the main reason for the
transmission of Parasitic nematode Onchocerca Volvulus which lead to
Onchocerciasis or " river blindness". The insect plays the role of
the larval host for the disease and then acts as the vector by which the
disease is being transmitted. The parasite lives on human skin and is
transmitted to the black fly during feeding. (Service, MW (2008). Medical Entomology for Students.
Cambridge University Press. pp. 81–92)[3]
References:
2.
Adler, Peter H.; Crosskey,
Roger W. (2017). World blackflies (Diptera: Simuliidae): a comprehensive revision of the
taxonomic and geographical inventory [2017] .
p. 11.
3.
Service, MW
(2008). Medical Entomology for Students. Cambridge University Press.
pp. 81–92.
ليست هناك تعليقات:
إرسال تعليق