Is mosquito a host in dengue?
Summary. The dengue virus is spread through a human-to-mosquito-to-human cycle of transmission, with the mosquito Aedes aegypti as the primary vector.
Who is most affected by dengue fever?
In hyperendemic areas in Asia, dengue fever (DF) and dengue haemorrhagic fever (DHF) affect mainly children under 15 years of age. The age distribution is different in the Americas where these syndromes occur in all age groups, although the majority of fatalities during epidemics occur in children.
Are humans dead end host for dengue?
People with inapparent dengue virus infections are generally considered dead-end hosts for transmission because they do not reach sufficiently high viremia levels to infect mosquitoes.
What is meant by dandy fever?
Dandy fever: An acute mosquito- borne viral illness of sudden onset that usually follows a benign course with headache, fever, prostration, severe joint and muscle pain, swollen glands (lymphadenopathy) and rash.
How did dengue start?
When a mosquito bites a person infected with a dengue virus, the virus enters the mosquito. Then, when the infected mosquito bites another person, the virus enters that person’s bloodstream and causes an infection.
What type of virus is dengue?
Dengue is an acute febrile disease caused by the mosquito-borne dengue viruses (DENVs), consisting of four serotypes (DENV 1 to 4), that are members of the flaviviridae family, genus flavivirus (1). All four DENV serotypes have emerged from sylvatic strains in the forests of South-East Asia (2).
What is the causative agent of dengue fever?
The virus responsible for causing dengue, is called dengue virus (DENV). There are four DENV serotypes, meaning that it is possible to be infected four times. While many DENV infections produce only mild illness, DENV can cause an acute flu-like illness.
Who is vulnerable dengue?
DHF and DSS are life-threatening conditions requiring hospitalization and are believed to occur most frequently among children, the elderly, and those previously infected with at least one of four strains (DENV-1, DENV-2, DENV-3, DENV-4) of dengue virus.
What are the 4 types of dengue fever?
There are four serotypes of dengue viruses, designated as DENV-1, DENV-2, DENV-3, and DENV-4; all are transmitted from human to human through the bite of certain species of Aedes mosquitoes, primarily Ae. aegypti and Ae.