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Haemonchus contortus, also known as the barber's pole worm, is a very common parasite and one of the most pathogenic nematodes of ruminants. Adult worms attach to abomasal mucosa and feed on the blood. This parasite is responsible for anemia, oedema, and death of infected sheep and goats, mainly during summer in warm, humid climates. [2]
By way of example, a parasite that reproduces in an intermediate host may require, as part of their life cycle, that the intermediate host be eaten by a predator at a higher trophic level, and some parasites are capable of altering the behavior of the intermediate host to make such predation more likely; [1] [2] a mechanism that has been called ...
Parasites are able to limit population growth and reproduction of species which may lead to a shift in the balance of an ecosystem. [11] Other ways parasites impact systems are through nutrient cycles. Parasites are able to create imbalances of the elements in a system through the relationship they have with a host and the host's diet. [12]
Elaeophora schneideri - Disease in sheep, goats, elk, moose. Orphan, stub. Filariasis (domestic animals) - Disease in dogs, horses, cattle, missing info in poultry. Stub. Habronema - Stomach worm in horses. Unreferenced. Haemonchus contortus - Disease in sheep and goats. Short stub.
Gasterophilus, commonly known as botfly, is a genus of parasitic fly from the family Oestridae that affects different types of animals, especially horses, but it can also act on cows, sheep, and goats. A case has also been recorded in a human baby.
The final larval stage is completed with the larvae attached to the mucosa of the horse's stomach. When ready to pupate the larvae detach and are voided in the horse's feces. Another example is Dermatobia hominis, torsalo-fly, which is an important parasite of cattle, and sometimes humans, in tropical regions of South America.
External parasites of primary concern from an economic perspective are biting flies, grubs, lice and ticks. Nuisance flies such as house flies and face flies, can affect cattle to a lesser degree.
The life expectancy of the parasite, coupled with the frequency of anthelminthic treatments, will also play a role in the rate of infection within a host. The temperature and humidity of the environment can affect the survival of E. granulosus. [4] Once sheep are infected, the infection typically remains within the sheep for life.