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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.
As a result, most veterinarians now recommend deworming for small strongyles based on fecal egg counts to minimize the development of resistant parasite populations. [15] Fecal egg count reduction tests can also be performed to identify which dewormers are effective on a particular farm.
These fecal samples can be viewed under a microscope to identify the eggs of S. vulgaris. Diagnosis via egg identification is not enough to determine if the horse has a S. vulgaris infection as the fecal samples often contain a mixture of large and small strongyle eggs that are very similar in appearance.
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.
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 .
The fecal egg count reduction test was suggested in the World Association for the Advancement of Veterinary Parasitology guideline for estimating the reduction in fecal egg counts and its corresponding confidence interval. [1] The results of this test can be used to determine the anthelmintic resistance status of the animals.
Eggs per gram (eggs/g) is a laboratory test that determines the number of eggs per gram of feces in patients suspected of having a parasitological infection, such as schistosomiasis. [ 1 ] Measuring the number of eggs per gram is the primary diagnostic method for schistosomiasis, as opposed to a blood test .
The direct counting of nematode eggs in feces is the method of choice for yearling animals, whereas in adult animals it may yield high variability due to a cow's immunity and low egg output. [41] Other biochemical methods have been developed to help more accurately diagnose O. ostertagi parasitism. These include the determination of specific ...