Worm control practice against gastro-intestinal parasites in Norwegian sheep and goat flocks

Domke, Atle V. Meling; Chartier, Christophe; Gjerde, Bjørn; Leine, Nils; Vatn, Synnøve; Østerås, Olav; Stuen, Snorre

doi:10.1186/1751-0147-53-29

Cited by 37 publications

(39 citation statements)

References 42 publications

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“…March–May ( Vatn, 2009 ). Turnout to spring pastures commonly occurs two to three weeks postpartum ( Domke et al, 2011 ). Clinical signs due to coccidiosis are mainly seen at around turnout.…”

Section: Methodsmentioning

confidence: 99%

Field evaluation of anticoccidial efficacy: A novel approach demonstrates reduced efficacy of toltrazuril against ovine Eimeria spp. in Norway

Odden

Denwood

Stuen

et al. 2018

International Journal for Parasitology: Drugs and Drug Resistan

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Ovine Eimeria spp. infections cause reduced welfare, increased mortality, and substantial economic losses, and anticoccidials are crucial for their control. Recent reports of toltrazuril resistance in pigs, and anecdotal reports of reduced anticoccidial efficacy in lambs, necessitate evaluation of anticoccidial efficacy. Due to the substantial lifecycle differences between nematodes and coccidia, current WAAVP methods for assessing anthelmintic efficacy are not suitable for such evaluations. Faecal samples were collected from 8 pairs of twin lambs from 36 Norwegian sheep farms 6–8 days after turnout. One twin of each pair was then treated with 20 mg/kg toltrazuril and a second faecal sample from all lambs was collected 7–11 days later. Oocyst excretion rate in all samples was determined using McMasters. Suitability of treatment timing was investigated by evaluating the increase in mean log oocyst excretion in untreated lambs. Based on comparisons between groups, a threshold of ≥0.75 (13 farms) was used to identify farms where drug efficacy could be assessed with confidence, drug efficacy on farms with increases of ≥0.5 but <0.75 (7 farms) were evaluated with caution, and drug efficacy on farms with increases of <0.5 (16 farms) was not estimated. Reduction in oocyst excretion between samples from treated lambs compared with controls from the 20 farms with a threshold of ≥0.5 were then analysed using a generalised linear mixed model. The results were classified based on 95% CI obtained using parametric bootstrapping. Among these 20 farms, two exhibited reduced drug efficacy (upper 95% CI < 95%), 13 had good efficacy (lower 95% CI > 90%), and for 5 the results were inconclusive. This is the first evidence-based report of reduced anticoccidial efficacy in ovine Eimeria spp. Additionally, we highlight the problem of sub-optimal timing of treatment (16/36 farms), which could potentially result in incorrect conclusions being reached regarding lack of drug efficacy.

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Section: Methodsmentioning

confidence: 99%

Field evaluation of anticoccidial efficacy: A novel approach demonstrates reduced efficacy of toltrazuril against ovine Eimeria spp. in Norway

Odden

Denwood

Stuen

et al. 2018

International Journal for Parasitology: Drugs and Drug Resistan

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“…A predominant sheep breed in Norway is the Norwegian White Sheep (NWS). It constitutes 76.2% of all sheep flocks in Norway (Domke et al, 2011). NWS is a crossbreed composed of Dala, Rygja, Steigal and Texel breeds selected for fast growing lambs, good reproduction and high meat yield (Boman, et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effects of different production systems on carcass and meat quality of sheep and lamb from Western Balkan and Norway

et al. 2015

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The identification of meat quality characteristics from selected breeds grazing in specific regions is particularly relevant to achieve a marketing advantage. Longisimus thoracis at lumborum (LTL) from the indigenous Western Balkan (WB) sheep -VlašićkaPramenka (VP) sheep and lambs, and Pivska Pramenka (PP) sheep grazing in Bosnia & Herzegovina (B&H) and Montenegro (MN), respectively, was compared regarding carcass and meat qualities to the crossbred Norwegian white sheep (NWS) -sheep and lambs, grazing in wide Hardangervidda and Jotunheimen regions where the lamb meat is marketed as gourmet meat. The WB sheep had lower average carcass weights and antioxidant capacity, higher ultimate pH, intramuscular fat and n-6/n-3 ratio, but better tenderness and color stability compared to NWS. The WB lambs were lighter, had higher n-6/n-3 ratio, lower antioxidant capacity and became more easily rancid despite a higher fat α-tocopherol content. The marketing advantage of WB meat is its tenderness properties while NO's NWS lambs displayed a better nutritional profile.

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“…However, several countries have reported anthelmintic resistance, representing a limitation for sustainable small ruminant production (Domke et al, 2011). Improvements in the management systems and husbandry practices coupled with strategic deworming when conditions are most www.ccsenet.org/jas Journal of Agricultural Science Vol.…”

Section: Chabertia Ovina Oesophagostomum Columbianummentioning

confidence: 99%

A Review of the Epidemiology of Gastrointestinal Nematode Infections in Sheep and Goats in Ghana

Blackie¹

2014

JAS

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In this paper, the gastrointestinal nematode parasites infecting small ruminants (sheep and goats) in Ghana and the epidemiological factors influencing their prevalence are reviewed and discussed. Twelve nematode species belonging to six families have been reported to infect these livestock in the country with Haemonchus contortus being the most prevalent helminth parasite in both animals. Parasitic gastroenteritis is caused by mixed infection of several nematode species. Management /husbandry practices, climate and host influence are found to be the main factors that affect gastrointestinal nematode infections in sheep and goats. Seasonal changes in the level of infective strongylate nematode larvae on pasture in the different agro-ecological zones of Ghana are reviewed. The number of infective larvae on pasture is reported to be directly related to the pattern of rainfall. Consequently, rainfall could be relied on to predict the rate of transmission of infection in grazing animals. Finally, the relevance of epidemiological knowledge in the development of efficient measures for controlling gastrointestinal nematode infections in sheep and goats in Ghana is discussed.

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Worm control practice against gastro-intestinal parasites in Norwegian sheep and goat flocks

Cited by 37 publications

References 42 publications

Field evaluation of anticoccidial efficacy: A novel approach demonstrates reduced efficacy of toltrazuril against ovine Eimeria spp. in Norway

Field evaluation of anticoccidial efficacy: A novel approach demonstrates reduced efficacy of toltrazuril against ovine Eimeria spp. in Norway

Effects of different production systems on carcass and meat quality of sheep and lamb from Western Balkan and Norway

A Review of the Epidemiology of Gastrointestinal Nematode Infections in Sheep and Goats in Ghana

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