Helminths In Chickens Research Articles

Gastrointestinal helminth parasites of Gallus gallus raised in extensive system in the city of Viçosa, Minas Gerais, Brazil

Extensive rearing systems enable higher occurrence of helminths, which is a hindrance in poultry farming, significantly affecting productivity. A survey was conducted to determine the prevalence of gastrointestinal helminths in chickens reared in extensive system in the city of Vicosa, Minas Gerais, Brazil between December 2017 to September 2018. A total of 5579 specimens were recovered from the gastrointestinal tracts of most animals (81.55% of prevalence). Of the positive birds, only 41.67% had mixed infections, and of these, more than 90% were nematodes and cestodes co-infections. Three nematodes (Ascaridia galli, Heterakis gallinarum, Capillaria sp.), seven cestodes (Raillietina tetragona, R. echinobothrida, R. cesticillus, Choanotaenia infundibulum, Hymenolepis cantaniana, H. carioca and Davainea proglottina) and two trematodes (Postharmostomum commutatum and Echinostoma sp.) species were identified. The most dominant helminth species was H. gallinarum (60.19%), which also presented higher average intensity (35.46 ± 0.65) and abundance (21.34 ± 3.01) among all recovered species. The tapeworm species correspond to 42.23% of prevalence and the trematodes correspond to only 3.40%. Despite the scarcity of data in the Brazilian literature on poultry helminths reared in extensive systems, regional parasitological surveys are important. It is expected that these results will contribute to the adoption of prophylactic measures and alternative control strategies in order to reduce the risk of helminth infection in poultry

Prevalence of Gastrointestinal Helminths in Chickens in Afyonkarahisar District, Turkey

Summary This study was carried out in Afyonkarahisar region of Western Turkey, where chickens and eggs are produced intensively, for determining the prevalence of the gastro-intestinal helminths in chicken. This research was conducted on 200 broilers, collected from 10 modern farms, 200 layer hens, from different 10 modern farms and on 100 free ranging backyard chickens. According to the necropsy findings, none of gastro-intestinal helminths was found in broiler chickens. In total 4 modern layer farms, Choanotaenia infundibulum was detected in 23 (11.5%) chickens out of 200. A total of 58 (58%) free-range backyard chickens were infected with various helminth species, which were: Heterakis gallinarum 38%, Ascaridia galli 19%, C. obsignata 15%, Capillaria caudinflata 13%, Trichostrongylus tenuis 3%, Subulura differens 2%, Choanotaenia infundibulum 14%, Raillietina echinobothrida 6%, R. cesticillus %3. The predominantly seen helminth species was H. gallinarum (38%) and the rarely seen species was S. differens (2%). In total 9 species were detected, which 6 of them were nematodes and 3 of them were cestodes. In infected chickens, minimum one and maximum 3 helminth species were detected. No trematode species was detected in necropsied and fecal examinated chickens. A total of 81 (16.2%) chickens out of 500 were found infected with various helminth species in necropsy and fecal examination. The helminth infection rates and species numbers in modern farms obtained less than in free-ranging systems.

New Records of Helminths in Chickens from Tennessee

New Records of Helminths in Chickens from Tennessee

The Nature of Helminth Infestations in Chickens in East Tennessee

IN THE literature on helminths of chickens there are few records of detailed surveys of all the parasitic fauna of a host in a given area. Exceptions are the papers of Baker (1930), who had initiated a survey of internal parasites in Quebec poultry and reported on nine species; of Adams and Geiser (1933), who reported on the helminths of 24 chickens in Dallas County, Texas; and of Ferry (1934), who reported on the cestodes of 50 chickens in and around Douglas County, Kansas. This is not to say, of course, that some conception of the distribution and incidence of helminths in chickens in the United States, at least, is not available. Wehr (1943) and Price (1943) have given reviews of the helminths parasitizing poultry in this country, and a number of papers, such as those of Beach and Free-born (1936), Bushnell and Twiehaus (1939), and Gifford and Eveleth (1944), .