Mosquitoes Experts at the 2016 International Congress of Entomology

mustapha

Jason Thomas, a graduate student at Texas A&M University, recently interviewed mosquito experts at the 2016 International Congress of Entomology in Orlando, Florida: For more info about the Congress, visit http://ice2016orlando.org. For more videos by Jason, visit http://tinyurl.com/grn3tj6.

Chemicals from a Mosquito Predator May Be Used to Control Them

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For decades, people have used a biological pesticide called Bacillus thuringiensis israelensis (Bti) to control mosquitoes and other insects. Bacillus thuringiensis is a bacterium that produces a protein that is toxic to insects, but is safe for humans. Organic farmers spray it on their crops in powder form, and modern plant breeders have inserted genes […]

Who, What, and Where Do Mosquitoes Bite?

mosquito-biting

By Cameron Webb Mosquitoes bite. They need to bite. Female mozzies require the nutritional hit of a bloodmeal to develop eggs. The blood can come from many different animals. Some mosquitoes are fussy with highly specific tastes, while others will feed on whoever, or whatever, is in the wrong place at the wrong time. Understanding […]

New Trap Proves Effective Against the Mosquito that Transmits Zika, Dengue, and Chikungunya

aedes-aegypti-larvae

By Harvey Black As concern and controversy swirl about the Zika virus, Argentinian researchers have developed a new trap that can be used to effectively monitor and control the Aedes aegypti mosquito, which is the primary transmitter of Zika, dengue, chikungunya, and yellow fever. The trap is described in the Journal of Medical Entomology. The […]

A Clip-on Repellent Device Offers Protection Against Aedes aegypti Mosquitoes

aedes-aegypti-AW2

By Josh Lancette With public concern about the Zika virus growing daily, people are looking for effective ways to prevent mosquito bites, and now there’s some good news for the concerned public. According to an article in the Journal of Medical Entomology, a product called the OFF!® Clip-On™ repellent device could be an effective tool […]

Mosquitoes More Likely to Lay Eggs in Water Sources Near Flowers

aedes-albopictus-butterfly-bush

By Josh Lancette Certain mosquitoes are more likely to lay eggs in water sources near flowers than in water sources without flowers, according to an article published in the Journal of Medical Entomology. Researchers from the USDA and the University of Florida studied the Asian tiger mosquito (Aedes albopictus) and its egg-laying preferences. This mosquito […]

Thirty-three Cases of Dengue Fever on Hawaii Island

Aedes aegypti mosquito

The State of Hawaii’s Department of Health is investigating a cluster of locally-acquired cases of dengue fever on Hawaii Island. Dengue is not endemic to Hawaii. However, it is intermittently imported from endemic areas by infected travelers. This is the first cluster of locally-acquired dengue fever since an outbreak on Oahu in 2011. The Deparment […]

Mowing Grass in Water-Detention Basins Increases Mosquito Populations

Culex-pipiens

Mowing grass and weeds is a useful way of managing some pests. For example, clearing yards and fields is one way of managing ticks without using insecticides because mowing discourages rodents — on which some ticks feed on. However, for other situations it may have the opposite effect. A study of the West Nile virus […]

Genetically Engineered Mosquitoes Reduce Dengue Transmitters by 95 Percent

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

This 2006 image depicted a female Aedes aegypti mosquito as she was obtaining a blood-meal from a human host through her fascicle, which had penetrated the host skin, was reddening in color, reflecting the blood’s coloration through this tubular structure. In this case, what would normally be an unsuspecting host was actually the CDC’s biomedical photographer’s own hand, which he’d offered to the hungry mosquito so that she’d alight, and be photographed while feeding. As it filled with blood, the abdomen became distended, stretched the exterior exoskeletal surface, causing it to become transparent, and allowed the collecting blood to become visible as an enlarging intra-abdominal red mass.

Dengue is a viral disease transmitted by urban Aedes mosquitos, principally A. aegypti, a species found living in close association with humans in most tropical urban areas. Mosquito biting activity is greatest in the morning for several hours after daybreak and in the late afternoon for several hours before dark. It may feed all day indoors, in shady areas, or when it is overcast. This mosquito breeds in artificial water containers, such as discarded tires, cans, barrels, buckets, 55 gallon drums, flower vases, and cisterns, all frequently found in the domestic environment. Since 1980, the incidence of dengue has increased dramatically in tropical countries worldwide, with endemic and/or epidemic virus transmission documented in most countries of the Caribbean Basin, Central and South America, the Pacific Islands, Asia, and Africa; many countries have had multiple outbreaks. Epidemics are frequently not reported because of inadequate disease surveillance.

The results of a trial of genetically engineered mosquitoes intended to reduce their ability to transmit dengue fever have been published in the journal PLOS Neglected Tropical Diseases. The mosquitoes, commonly known as “Friendly Aedes aegypti” mosqitoes in Brazil where the trial took place, were developed by a company called Oxitec. The results of the […]

Researchers Find La Crosse Virus in Aedes japonicus Mosquitoes

aedes-japonicus

By Harvey Black Researchers have found another invasive mosquito species that carries the virus responsible for La Crosse encephalitis in the Appalachian region. In the April 2015 edition of Emerging Infectious Diseases, Dr. Camille Harris, a wildlife disease ecologist, and her colleagues report finding Aedes japonicus mosquitoes carrying the virus in southwestern Virginia. This is […]