Dengue Virus Makes Mosquitoes Bite More Often

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News Picture: Dengue Virus Makes Mosquitoes Bite More Often

THURSDAY, Jan. 20, 2022 (HealthDay Information)

New analysis reveals that mosquitoes contaminated with the dengue virus chew extra typically, which triples the chance of transmitting the illness to individuals.

Dengue is without doubt one of the most typical mosquito-borne illnesses. It impacts greater than 400 million individuals every year worldwide, killing round 40,000.

Most contaminated individuals haven’t any signs or gentle ones reminiscent of nausea, vomiting, rash, fever and aches and pains. Nevertheless, 1 in 20 contaminated individuals develops extreme dengue, which may result in shock, internal bleeding and dying.

On this lab examine, researchers used high-resolution video to look at the blood-feeding habits of dengue-infected and non-infected mosquitoes utilizing mice. The movies have been then analyzed utilizing laptop software program.

“We discovered that the dengue virus will increase mosquito attraction to the mammalian host and the variety of mosquito bites,” mentioned examine senior co-author Ashley St. John, an affiliate professor within the Rising Infectious Illnesses Program at Duke-NUS Medical College Singapore.

“The upper attraction to the mammalian host will increase the possibilities of the mosquito to chew, whereas extra bites enhance the variety of transmission occasions as a result of every chew ends in the transmission of the virus,” St. John defined in a Duke information launch.

“This sheds new mild on the numerous methods the virus hijacks its vector to be transmitted,” mentioned examine senior writer Julien Pompon, a scientist and group chief at French Analysis Institute for Sustainable Improvement.

The outcomes have been revealed Jan. 18 within the Proceedings of the National Academy of Sciences. Animal analysis doesn’t at all times pan out in people.

At the moment, there isn’t any option to management dengue.

“The examine will assist advance our understanding of the epidemiology of dengue and higher tailor illness management methods,” Pompon mentioned within the launch.

The researchers wish to be taught extra about what causes the adjustments in feeding habits in dengue-infected mosquitoes. If they’ll pinpoint a gene or protein answerable for the adjustments, they mentioned it is perhaps potential to create chemical compounds that concentrate on them.

Extra data

For extra on dengue, see the World Health Organization.

SOURCE: Duke-NUS Medical College Singapore, information launch, Jan. 13, 2022

Robert Preidt

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