Species composition of Gasterophilus spp. (Diptera, Oestridae) causing equine gastric myiasis in southern Italy: parasite biodiversity and risks for extinction. Vet Parasitol. Jan 15;() doi: / Epub Nov Gasterophilus spp. infections in horses from northern and. Biology, prevention and control of HORSE BOT FLY infections, Gasterophilus spp . Species, occurrence, distribution, incidence, prevalence, life.

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Dispersal also occurs during larval stages by transport of infested equines from one location to another Zurek Lateral view of an adult horse bot fly, Gasterophilus intestinalis DeGeer.

Horse bot fly, Gasterophilus intestinalis DeGeeregg case hatched attached to a horse hair. Gasterophilus intestinalis DeGeer is the more common horse bot fly which is an internal parasite of the gastrointestinal tract. Bot eggs can be removed from the horse’s body by several methods.

In regions with a warmer climate where flies can occur throughout the year additional treatments may be needed. Both are indicated for the control of L2- and L3 larvae in the gastrointestinal tract. The uniqueness of the spines is helpful in identifying the species.

Ventral view head on left of the third instar larva of the common horse bot fly, Gasterophilus intestinalis DeGeer.

Injuries may result as the horse tries to rid themselves of this hovering fly. The bot flies are in the family Oestridae.

Gasterophilus spp. infections in horses from northern and central Kazakhstan.

Gasterophilus spp is a very common condition in horses caused by the bot fly Oestridae. Diagnosis of Gasterophilus spp in Horses. Gasterophilua the second and third instar larvae inhabit the gastrointestinal tract and attach to the stomach and intestine, multiple complications may arise.


Afterward, a thorough physical examination will need to be performed, which includes weight, height, body condition score, temperature, behavior, breath sounds, heart rate, and blood pressure.

Gasterophilus spp in Horses – Symptoms, Causes, Diagnosis, Treatment, Recovery, Management, Cost

Tick, fly, and mosquito control — Lessons from the past, solutions for the future. The bot fly looks similar to a bumblebee with a hairy head and can be yellow and brown, black and white or black and yellow. Removing and disposal of feces contaminated with larvae reduces the number of larvae that infect horses, pupate and subsequently hatch.

After wandering in the mucosa of the mouth, the larvae molt to the second stage and move into the stomach Merial The adults have non-functional mouthparts, so they cannot feed. This page was last edited on 8 Septemberat The female increases the chance of larval survival by not limiting her eggs to one horse Cogley and Cogley According to Mullen and Durdenhorses are capable of tolerating an infestation of larvae.

Gasterophilus is a genus of parasitic flies in the family Oestridaemore commonly known as botfly. The bot fly eggs are approximately 0.

Dispersal of eggs by the female is not restricted to one horse but can occur on many horses within an area. The eggs develop into gasterolhilus instar larvae within five days of being deposited by the female. Further development and behavior are also species-specific. Very occasionally Gasterophilus spp may also cause ocular or skin myiasis.

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Usually only one generation is produced each year. Gasterophilus intestinalis DeGeer Insecta: This can significantly reduce the fly populations, especially if it is done by most horse keepers in large areas. Knowing the local seasonal behavior of the flies can gasteroophilus help to estimate whereas the observed symptoms could be due to these flies or to other unrelated factors.


Dorsal view head on left of the third instar larva of the common horse bot fly, Gasterophilus intestinalis De Geer. Injuries can aso occur as the horse tries to avoid hovering flies.

Within this family are four subfamilies, including the Gasterophilinae, the stomach bot flies. Related Health Articles Ticks. Within the myiases, horse bot flies are so-called primary myiasesi.

Some species may affect caribous as well. The common host of this particular species gaxterophilus bot fly is the horse. After the third instar larvae have matured, they detach from the gastrointestinal tract and pass from the horse’s body in the feces.

The larvae then detach from the gastric mucosa within the stomach and are passed through the feces and pupate. Gasterophilus intestinalishorse bot fly; G. Depending on the number of larvae, more or less severe swellings, irritation and inflammation of mouth lining, tongue, and related structures can occur.

The adult horse bot fly emerges after a three to 10 week period during the summer or fall season. Kansas State Research and Gasterophikus.