Pathobiology of Heterakis gallinarum mono-infection and co-infection with Histomonas meleagridis in layer chickens. Schwarz A(1), Gauly M, Abel H, Daş G . We investigated whether density related effects are directly controlling lifetime fecundity of Heterakis gallinarum. Daily total numbers of H. infecting Brazilian turkeys are reported. The intestinal nematode Heterakis gallinarum appeared with a prevalence of 70% in the infected birds.

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In egg-laying hens, heavy infection significantly reduces egg production. Control of Ticks Biol. See also Tropical savanna and grassland biome. Effective treatment is by using mebendazolewhich is normally distributed to a flock of birds in their food and water. Some larvae may penetrate the lining of the cecum, but it seems that most do not and complete development to adult worms in the lumen of the cecum after several molts.

Females reach sexual maturity and start to lay eggs sometime between the age of 24 and 36 days. A grassland with scattered trees or scattered clumps of trees, a type of community intermediate between grassland and forest. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends.

Males have tail flaps alae and a copulatory bursa with two unequally long spicules f or attaching to the female during copulation. Mem Inst Oswaldo Cruz. From Wikipedia, the free encyclopedia.

They are particularly harmful and often fatal for turkeys. Their Development and Gallimarum. To cite this page: Adult female and male cecal worms differ in length, with the female 10 to 15 mm generally being larger than the male 7 to 13 mm.


Located anteriorly, these invaginations of the cuticle are made of many neurons which interpret and transmit incoming chemical signals.

The number of eggs laid by a female cecal worm is heteakis upon the species of bird it inhabits, but the average number of eggs laid is They can destroy large portions of the gut’s wall and liver tissues. Egg production in layers can be significantly reduced. Birds become infected after eating infective eggs either directly with contaminated food or water, or indirectly when eating earthworms or flies.

Foundations of Parasitology, 7th ed. Adult female worms in the small intestine pass eggs with the feces about per day per female! There are a no reports on confirmed resistance of Heterakis worms to anthelmintics. Found on all continents except maybe Antarctica and in all biogeographic provinces; or in all the major oceans Atlantic, Indian, and Pacific.

Synapomorphy of the Bilateria. Male heterxkis are fully mature 14 days after they have infected the host.

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Nearctic living in the Nearctic biogeographic province, the northern part of the New World. As in other nematodes, H. Details Written by P. Anderson, ; Olsen, Reproduction Like most other nematode species, H. Accessed December 31, at https: Roberts and Janovy, ; Wright and Hui, ; Wright, Communication Channels tactile chemical Perception Channels tactile chemical Food Habits Heterakis gallinarum feeds on the cecal contents of the bird in which it resides.

You may be interested in an article in this site on medicinal plants against external and internal parasites. Once eaten, the egg travels through the digestive system of the host until it reaches the intestine where it hatches.


Heterakis gallinarum – Wikipedia

Articles with ‘species’ microformats. Areas of soil with dense foliage better support the eggs by lessening the chances galkinarum damage from desiccation, extreme temperatures, or other organisms. Journal of Parasitology46 Some compounds with a narrower spectrum are also effective against these worms, e.

Implications for survival of H. Help us improve the site by taking our survey. Within the egg, the larvae develop to the infective second stage. Lund and Chute, ; Lund and Chute, ; Olsen, Journal of Parasitology62 4: Their development is completed in the lumenbut some may enter the mucosa and remain for years without further development. The worms have a tubular digestive system with two openings, the mouth and the anus.

Earthworms and houseflies are considered paratenic hosts, as they can ingest the egg in feces and a juvenile may hatch in tissues, which stays dormant until eaten by birds.

Also in this site: Heavy infections can cause inflammation and thickening of the cecum, appearance of nodules and numerous small bleedings in the cecal wall, especially in turkey. Diagnosis commonly is through the presence of eggs in host feces. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts.

In other projects Wikimedia Commons. Extensive savannas are found in parts of subtropical and tropical Africa and South America, and in Australia.