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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But unprotected young foals are at risk of suffering severe damage and even death after massive infections. Kansas State Research and Education. Although these cases are rare, they often occur in individuals handling horses that have bot fly eggs on their hair.

Next, the veterinarian will check for lameness by looking at the way your pet moves while they walk and trot. Diagnosis of Gasterophilus spp in Horses.

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

Horse bot flies undergo complete metamorphosis, including three larval instars Merial Recovery of Gasterophilus spp in Horses. L2- and L3-larvae attaching to the stomach or intestinal walls can cause swellings, erosions, and other damages on the affected tissues.

Gasterophilus LeachSpecies G. In regions with moderate or cold climate e.

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

Form and disposition of the hooks are species specific and are used for species determination. Photograph by Lyle Buss, University of Florida. Book me a walkiee?


The adult has small, nonfunctional mouthparts and does not feed DuPonte and LarishKaufman et al. For this reason, in endemic areas the number of pupae in horse fecal piles may be very high. Prevalence and incidence are regionally very different and depend strongly on climatic and ecologic conditions.

Diagnosis is usually difficult, because many of the symptoms caused by Gasterophilus infections diarrhea, colic, gastritis, anemia, etc. Removing the Bots The larvae are excreted in the fecal matter, so it is important to clean up the feces on a regular basis. Weight-loss may occur if the annoyance is great enough to cause the horse to stop grazing.

Gasterophilus spp in Horses

This stage of the life cycle occurs between late winter and early spring. The female’s abdomen is elongated, curled under and serves as an ovipositor Zurek The adults have non-functional mouthparts, gasterophulus they cannot feed.

Gasterophilus are found worldwide, but are prominently present during the summer months. The horse should be treated within one month after eggs are seen during the early summer months.

Other health issues that may develop due to a severe infestation of these larvae include: The larvae then detach from the gastric mucosa within the stomach and are passed through the feces and pupate. Another useful measure is to remove the fly eggs deposited on the host’s hairs.

The horse bot fly causes indirect damage to the horse gasterophklus attempts at egg laying.

Repellents provide usually only a few hours protection, if at all, and may not properly protect the whole body surface of the horses. Treating the Bots Killing the internal bots is done by giving your horse avermectins or moxidectin at the end of the summer and then given annually in the early summer months to prevent future infestations. From Wikipedia, the free encyclopedia. Horse bot flies are Dipteran flies two wings of the species Gasterophilus that belong to the the family Oestridae.


A second treatment should be administered in the Fall to control the second gasterophilys third stage larvae.

Other relevant species in Europe are Gasterophilus inermis and Gasterophilus nigricornis. Navigation menu Personal tools Because of horses’ behavior to habitually defecate in the same location and the lack of larvae movement, the amount of pupae in fecal piles can become rather significant Cogley and Cogley Photograph by Jerry Butler, University of Florida. Related Health Articles Ticks. An insecticide can also be applied weekly during the peak egg laying season to the areas of the body covered with bot eggs.

The stages of the life cycle are not restricted to certain seasons due to the varied climates found in different geographical locations. On the whole, Most species affect horses, donkeys and mules a few species also wild equids e.