Boca Pediatrics

Trombiculidae
History
Trombiculidae, Greek ("tremble") and Culex Latin gen. culicis ("gnat" or "fly"), was first described as an independent family of HE Ewing in 1944. But references to chiggers go as far as China in the sixth century, and in 1733, the first recognizance trombiculid mites in North America have been made. In 1758, Linnaeus described a single species Acarus batatas (Now Trombicula batatas). However, most information on chiggers came problems arose during and after the Second World War.
Then, when the family was first described, it consisted of two sub-families, and Hemitrombiculinae Trombiculinae. Womersley added another Leeuwenhoekiinae, which at the time contained only Leeuwenhoekia (Oudemans, 1911). Later, he built the family Leeuwenhoekiidae gender and sub-family, with six genera, they have a pair of setae present on the dorsal submedian plate.
Distribution
trombiculid mites are found throughout the world. In Europe and North America, they tend to be more common in hot and humid. In more temperate regions, they are only found in summer (in French, are called harvest mites aotat, or "August" flies). In the U.S., they occur mainly in the south-east, south and Midwest. They are not present or found only in remote areas of the North, in the high mountains and deserts. In the British Isles, the species are called autumnalis Trombicula mite harvest in North American species alfreddugesi Trombicula and Trombicula species (eutrombicula) hirst located in Australia and is commonly called the moth scrub itching.
Lifecycle
The life cycle of a harvest mite
The cycle length depends on the mite species and the environment, but normally last two to 12 months (but can be longer). The number of cycles in one year depends on the region. For example, in a temperate region, there may be only 3 per year, but in the tropics, the cycle could be continuous throughout the year. Adult harvest mites overwinter in protected places such as slightly below the ground. Females become active in spring, and once the soil temperatures are regularly above 60 (15.6), lays her eggs, up to 15 eggs per day in vegetation when soil temperatures are 60 (15 , 6). Therefore, from April to early fall until the first frost, humans are susceptible to CHIGGA bites. Larvae in groups on small clods of soil, vegetation mat and even small shrubs and plants, where they have easier access to a potential host. The eggs are dormant for about six days, after which the non-emergence of pre-feeding larvae, with only three pairs of legs. After about six days, the larva develops in its larval stage before.
Larva
The larvae, commonly called chigga, are about 0.170.21 mm (0.0070.008) in diameter, usually bright red, hairy, and move rapidly relative to the size. There is a marked constriction in the front part of the body in the nymphs and adults. The eggs are round in shape.Chigger is also a substitute term for the chip quid (Tunga penetrans), a sand flea in the tropics and subtropics in the Americas and Africa.
The original name CHIGGA as a corruption of the quid. Also called scrub mite, red mite and several other names, they are found throughout the temperate and tropical. Chiggers are available in 3 stages: deutovum, fasting larvae, and larvae engorged. Once in the developing egg, larvae enclosed in a membrane over the shell, are called deutovum. After hatching, the larvae migrate to the highest fasting and waiting area of a host.
The larval stage is the only stage of the parasite life cycle of the mite. They are parasites of many animals. About 30 of the many species of this family in their larval stage, attach to various animals, including amphibians, reptiles, birds and mammals, and feed the skin. This often leads to a new intensely itchy.