mosquito

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mosquito

(məskē`tō), small, long-legged insectinsect,
invertebrate animal of the class Insecta of the phylum Arthropoda. Like other arthropods, an insect has a hard outer covering, or exoskeleton, a segmented body, and jointed legs. Adult insects typically have wings and are the only flying invertebrates.
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 of the order Diptera, the true fliesfly,
name commonly used for any of a variety of winged insects, but properly restricted to members of the order Diptera, the true flies, which includes the housefly, gnat, midge, mosquito, and tsetse fly.
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. The females of most species have piercing and sucking mouth parts and apparently they must feed at least once upon mammalian blood before their eggs can develop properly. The males may have beaks, or probosces, but cannot pierce, and they feed upon fruit and plant juices. The female produces the characteristic whining sound by vibrating thin horny membranes on the thorax. Mosquitoes have become adapted to extremes of climate and are found far north of the Arctic Circle, where they winter as larvae frozen in the ice.

Mosquito eggs are laid singly or glued together to form rafts, usually in stagnant water in ponds, pools, open containers, and other aquatic habitats—the particular type of habitat depending on the species. The aquatic larvae, or wrigglers, pass through four larval stages, feeding on microscopic animal and plant life. Except in the genus Anopheles, the wriggler has an air tube near the end of the abdomen and makes frequent trips to the surface to use it as a supplement to the gills. The pupa, or tumbler, shaped like a question mark, takes no food but surfaces often to breathe through air tubes on its thorax. One method of mosquito control is the spreading of oily substances on infested water, which prevents access to air and suffocates the pupae. In summer the life cycle may take only two weeks, resulting in several generations a year in some species.

During blood meals the females may either acquire or transmit various disease organisms, and are considered to be the deadliest animals on earth, causing the deaths of nearly two million people each year in the 21st cent. and by some estimates almost half of all humans who have ever lived. Several species of Anopheles mosquitoes, recognizable by their tilted resting position, carry the protozoan parasites that cause malariamalaria,
infectious parasitic disease that can be either acute or chronic and is frequently recurrent. Malaria is common in Africa, Central and South America, the Mediterranean countries, Asia, and many of the Pacific islands.
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; species of the genus Aedes transmit the viruses responsible for yellow feveryellow fever,
acute infectious disease endemic in tropical Africa and many areas of South and Central America. Yellow fever is caused by a virus transmitted by the bite of the female Aedes aegypti mosquito, which breeds in stagnant water near human habitations.
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, chikungunyachikungunya
, viral disease transmitted by the bite of an infected female Aedes mosquito. Symptoms appear after an incubation period of four to eight days and include sudden high fever, severe joint and muscle pain, and often headache, nausea, fatigue, and rash.
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, dengue feverdengue fever
, acute infectious disease caused by four closely related viruses and transmitted by the bite of the female Aedes mosquito; it is also known as breakbone fever and bone-crusher disease.
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, and Zika virusZika virus
, single-stranded RNA virus of the genus flavivirus that infects human and primates and causes a disease known as Zika fever or zika. It is primarily transmitted by the bite of a female Aedes
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; and in the S United States and in the tropics, members of the genus Culex, to which the common house mosquito belongs, are vectors of filariasis, the infection by a filarial worm that causes elephantiasiselephantiasis
, abnormal enlargement of any part of the body due to obstruction of the lymphatic channels in the area (see lymphatic system), usually affecting the arms, legs, or external genitals.
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, and human encephalitisencephalitis
, general term used to describe a diffuse inflammation of the brain and spinal cord, usually of viral origin, often transmitted by mosquitoes, in contrast to a bacterial infection of the meninges (membrane surrounding the brain and spinal cord), known as meningitis.
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. Culex species also transmit West Nile virusWest Nile virus,
microorganism and the infection resulting from it, which typically produces no symptoms or a flulike condition. The virus is a flavivirus and is related to a number of viruses that cause encephalitis.
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.

Dragonflies, damselflies, and several insectivorous birds are the natural enemies of the adults; the wrigglers are eaten in large quantities by small fishes and aquatic insects. Control of these major insect pests by other than natural means poses many problems; the long-range harmful effects of many insecticidesinsecticides,
chemical, biological, or other agents used to destroy insect pests; the term commonly refers to chemical agents only. Chemical Insecticides

The modern history of chemical insecticides in the United States dates from 1867, when Paris green proved
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 are very serious, and swamp drainage tends to upset the balance of nature in addition to eliminating the mosquito.

Mosquitoes are classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
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, class Insecta, order Diptera, family Culicidae.

Bibliography

See bulletins of the U.S. Dept. of Agriculture; study by A. Spielman and M. D'Antonio (2001); T. C. Winegard, The Mosquito: A Human History of Our Deadliest Predator (2019).

mosquito

[mə′skēd·ō]
(invertebrate zoology)
Any member of the dipterous subfamily Culicinae; a slender fragile insect, with long legs, a long slender abdomen, and narrow wings.

mosquito

any dipterous insect of the family Culicidae: the females have a long proboscis adapted for piercing the skin of man and animals to suck their blood

mosquito noise

A distortion that appears near crisp edges of objects in MPEG and other video frames that are compressed with the discrete cosine transform (DCT). It occurs at decompression when the decoding engine has to approximate the discarded data by inverting the transform model. The mosquito noise appears as random aliasing in these areas and requires sophisticated detection circuits to eliminate it. As TVs get larger, mosquito noise and other artifacts become more noticeable. See artifact. See also Mosquitotone.


Before and After
The mosquito noise on the left is removed with Algolith's Home Theater 3D Mosquito Noise Reducer appliance. The image is enlarged to show more detail. (Image courtesy of Algolith inc., www.algolith.com)

Mosquitotone

A cellphone ringtone that uses a constant, 14.4 kHz frequency generally only heard by people under 20. Also known as "Teen Buzz" or "Mozzy Tone," it became popular because parents and teachers usually cannot hear the high-pitched tone when the phones are ringing. After 20, most people's ability to hear these higher frequencies begins to decline; however, some aged 50 and older have been known to recognize the ringtone.

Keep Teenagers From Loitering
The Mosquitotone uses a constant 14.4 kHz sound; the idea taken from the modulated 17 kHz tone of the Mosquito sound-emitting device introduced in Wales in 2005 from Compound Security Systems (www.compoundsecurity.co.uk). The Mosquito was designed to prevent teenagers from loitering in the area. After a few minutes, the sound becomes very irritating, and the crowd tends to move to another venue. See ringtone.
References in periodicals archive ?
It's bigger than California." Not too long ago, Mozzy would have been satisfied with being a regional superstar like one of his all-time favorite rappers, the now-slain Bay Area native The Jacka, who released over ten solo albums and dozens of collaborative projects, including two with Freeway toward the end of his life.
Alam naman namin kung sino siya eh," said Mozzy in a shaky voice.
Mozzy's a nice guy." She was right - he was different to the guys back in England.
Mozzy Off promises gentle protection from biting insects for up to six hours, is waterproof and contains natural soothing ingredients to relieve the itch of previous bites.
'He has out-of-this-world competitiveness,' Mozzy says of her eldest son.
Volleyball expert Mozzy Ravena and son Kiefer joined the final leg of the camp also supported by STI College, Toby's Sports, Wilson, University of Batangas, The Frazzled Cook, Glutamax, Gatorade, Jollibee, Intermatrix, Ally's, AQ and Lotto.
Kiefer Ravena and his mother Mozzy have always been on the same team.
Valdez had the help of Ravena's mother and Philippine volleyball legend Mozzy Ravena, Dani Ravena, Casey Da Silva, Michelle Gumabao, Michelle Morente, Jen Reyes, Jaja Santiago, Santi Edralin, Ella de Jesus, and IC Mendoza.
Most of Nap's guests were hunky college cagers, but there were bigname stars too, like James Yap, who came with gorgeous Italian girlfriend Michela Cazzola, Gary and Jenny David, comedy queen AiAi de las Alas, escorted by DLSU badminton player Gerald Sibayan, the Ravena family, Kiefer, Thirdy and mom Mozzy, Danny Espiritu, Jaime Alcantara, MyPhone president, and Solar Entertainment chief Wilson Tieng, among many others.
The firstborn of former pro Bong and former volleyball player Mozzy, Ravena was a member of the LSGH team that won the Small Basketeers (SBP) title over 10 years ago.
Kiefer's mom, Mozzy is happy that his eldest son finally returns to what she calls 'Kiefer's 'first love'.
"The second I joined Warwickshire the medical team in Mozzy (Gerhart Mostert) and Jack (Murfin) have been superb and they've got me playing.