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Parascaris equorum is a species of ascarid that is the equine roundworm. Amongst horse owners, the parasites are colloquially called "Ascarids". This is a host-specific helminth intestinal parasite that can infect horses, donkeys, and zebras. Horses up to six months of age are the most susceptible to infection.
Treating a horse with regular dewormer when they have the worms inside of them may cause the worms to migrate all at once, causing rupture of the intestines and lead to death. [11] Recommendations for deworming horses include performing fecal egg counts to determine what kind of protection each individual horse requires and alternating products ...
After the eggs have hatched in the feces, the larvae are ingested by the maggots of various flies that lay their eggs in the feces (such as Stomoxys (the stable fly) or Musca (the house fly). The nematode larvae develop within the maggot for about one week (depending upon ambient temperature), as the maggots mature into the imago (adult) fly .
This means that one egg may produce thousands of adult worms. [15] Helminth eggs remain viable for 1–2 months in crops and for many months in soil, fresh water, and sewage, or even for several years in feces, fecal sludge (historically called night soil), and sewage sludge – a period that is much longer compared to other microorganisms. [16 ...
Lifecycle is similar to mosquitoes: females lay eggs on plants at surface of streams and rivers; larvae settle onto solid substrate in water and feed on suspended organic detritus; pupation occurs at water surface. Hosts are most livestock species, horses and poultry and many wild animals. Humans also may be severely distressed by blackflies.
Veterinary parasitology is a branch of veterinary medicine that deals with the study of morphology, life-cycle, pathogenesis, diagnosis, treatment, and control of eukaryotic invertebrates of the kingdom Animalia and the taxon Protozoa that depend upon other invertebrates and higher vertebrates for their propagation, nutrition, and metabolism without necessarily causing the death of their hosts.
Gasterophilus intestinalis, also known as horse bot fly, is a species of insect of the family Oestridae, [2] and is found worldwide. [3] The adults, which have a bumblebee-like appearance, are prominently active in the summer. [4] G. intestinalis is primarily a parasite of horses, mules and donkeys, [5] rarely of other animals. [6]
The site of entry for the parasite is thought to be through breaks in the skin or through mucous membranes. [2] This nematode is now distributed worldwide, as cases of equine infections have been found in Canada, Florida, the Nordic regions, and Arabian horses alike. [3] [4] [5]