NDLI: Are Teladorsagia circumcincta (Nematoda) morphs equally able to survive under anthelmintic treatment in sheep on pastures?

Content Provider	Springer Nature Link
Author	Leignel, V. Cabaret, J.
Copyright Year	2001
Abstract	The nematode Teladorsagia circumcincta is a polymorphic species, morphs T. c. trifurcata and T. c. circumcincta being the most frequent. Among other traits, T. c. trifurcata has lower infectivity than T. c. circumcincta. Anthelmintic treatments that regularly remove populations should favour the more infective T. c. circumcincta. The present investigation was intended to test the respective capabilities of the two morphs to withstand anthelmintic pressure. The nematode strain was susceptible to imidazothiazole and partly resistant to benzimidazole at the onset of experiment. A 2-year grazing season study was undertaken under four levels of anthelmintic pressure [from untreated controls to frequently treated with a poorly efficient benzimidazole (fenbendazole) or an efficient imidazothiazole (levamisole)]. The strain previously maintained in laboratory conditions regained its natural, original proportion of T. c. trifurcata during the first grazing season. The two morphs were equally resistant to fenbendazole; and the proportion of resistant nematodes did not vary between the two morphs. During the second grazing season, the treatments indirectly depleted the proportions of T. c. trifurcata, probably due to the poor infectivity of this morph.
Starting Page	687
Ending Page	692
Page Count	6
File Format	PDF
ISSN	09320113
Journal	Parasitology Research
Volume Number	87
Issue Number	9
e-ISSN	14321955
Language	English
Publisher	Springer-Verlag
Publisher Date	2001-05-29
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Veterinary Parasitology Insect Science

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Comparative analysis of the anthelmintic efficacy of European heather extracts on Teladorsagia circumcincta and Trichostrongylus colubriformis egg hatching and larval motility

The immunology and genetics of resistance of sheep to Teladorsagia circumcincta.

Use of a 203 αα fragment of Tc-PDI to detect IgA activity during infection by Teladorsagia circumcincta in sheep

Characterization of a multidrug resistant Teladorsagia circumcincta isolate from Spain

Actin in spermatids and spermatozoa of Teladorsagia circumcincta and Trichostrongylus colubriformis (Nematoda, Trichostrongylida)

Molecular Study of Benzimidazole Resistance in Teladorsagia circumcincta Isolated from Sheep in North of Iran.

Innovative restriction site created PCR-RFLP for detection of benzimidazole resistance in Teladorsagia circumcincta

Stable and unstable environments influence the genetic diversity of the nematode Teladorsagia circumcincta, a parasite of small ruminants

Changes in protein expression in the sheep abomasum following trickle infection with Teladorsagia circumcincta

Are Teladorsagia circumcincta (Nematoda) morphs equally able to survive under anthelmintic treatment in sheep on pastures?

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Comparative analysis of the anthelmintic efficacy of European heather extracts on Teladorsagia circumcincta and Trichostrongylus colubriformis egg hatching and larval motility

The immunology and genetics of resistance of sheep to Teladorsagia circumcincta.

Use of a 203 αα fragment of Tc-PDI to detect IgA activity during infection by Teladorsagia circumcincta in sheep

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Actin in spermatids and spermatozoa of Teladorsagia circumcincta and Trichostrongylus colubriformis (Nematoda, Trichostrongylida)

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Innovative restriction site created PCR-RFLP for detection of benzimidazole resistance in Teladorsagia circumcincta

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