The epidemiology of abomasal nematodes of sheep in Sweden, with particular reference to over-winter survival strategies

Veterinary Parasitology
P J WallerA Rydzik

Abstract

In May 2002, studies on the seasonal patterns of nematode infection of sheep were undertaken on four commercial sheep farms in southern Sweden, which had previously reported problems with nematode parasitism, especially due to Haemonchus contortus. One farm was used for intensive investigation. This entailed the establishment of two replicate groups of sheep, each consisting of 20 ewes and their lambs, on adjacent pasture paddocks. The seasonal patterns of nematode infection were followed by regular (approximately monthly) sampling of both ewes and lambs for nematode faecal egg counts and larval differentiation, and the sequential use of replicate groups of tracer lambs. H. contortus and Teladorsagia circumcincta were the most abundant nematode species, with the former most prevalent in the post-parturient faecal egg counts of ewes. Tracer worm counts showed almost 100% arrested development in the early fourth larval stage for H. contortus as early as mid-summer and the numbers of parasites progressively increased during the season. T. circumcincta also showed high levels of arrested development, but not as early, or as absolute, as for H. contortus. Tracers allocated to the paddocks at the time of turn-out following winter in ...Continue Reading

References

Oct 1, 1975·Parasitology·P J Waller, R J Thomas
Jul 15, 1989·Veterinary Parasitology·P NansenK Sejrsen
Oct 1, 1970·Parasitology·B M O'Sullivan, A D Donald
Apr 1, 1968·Australian Veterinary Journal·A D Donald
Mar 1, 1984·Veterinary Parasitology·I A BargerG F Brown
Feb 27, 1999·International Journal for Parasitology·N C Sangster
Jun 30, 2000·Parasitology·F Jackson, R L Coop

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Citations

Mar 29, 2014·Veterinary Parasitology·Michelle C SantosAlessandro F T Amarante
Oct 16, 2008·Genetics·Elizabeth RedmanJohn Stuart Gilleard
Dec 21, 2012·Animal : an International Journal of Animal Bioscience·M GaulyC Wrenzycki
Mar 10, 2012·Tropical Animal Health and Production·Sileshi BelewTadele Tolosa
Nov 21, 2012·Animal Health Research Reviews·M B Bolajoko, E R Morgan
Sep 15, 2012·Proceedings. Biological Sciences·Hannah J TidburyMike Boots
Apr 13, 2012·Veterinary Parasitology·E R Morgan, J van Dijk
Dec 14, 2011·Veterinary Parasitology·Jos G M HoudijkSpiridoula Athanasiadou
Apr 21, 2006·Ecology Letters·Sonia AltizerPejman Rohani
Oct 3, 2006·Veterinary Parasitology·Lauren J O'ConnorLewis P Kahn
Jun 13, 2006·Veterinary Parasitology·L F Le Jambre
Apr 22, 2015·Journal of Helminthology·C C Bassetto, A F T Amarante
Apr 17, 2015·Acta Veterinaria Scandinavica·Inga StadalienėSaulius Petkevičius
Jan 10, 2013·Veterinary Parasitology·Atle V Meling DomkeSnorre Stuen
Aug 30, 2006·Molecular and Biochemical Parasitology·Letusa AlbrechtGerhard Wunderlich
Sep 3, 2014·International Journal for Parasitology. Parasites and Wildlife·Susan J KutzGuilherme G Verocai
Aug 21, 2013·PLoS Pathogens·Lucien RufenerAlessandro Puoti
Oct 25, 2016·International Journal for Parasitology·David L EmeryLeo F Le Jambre

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