Evaluation of gastro-intestinal nematode parasite control strategies for first-season grazing cattle in Sweden

Dimander, Sten-Olof; Höglund, Johan; Uggla, A.; Spörndly, E.; Waller, P.J.

doi:10.1016/s0304-4017(02)00380-1

Cited by 83 publications

(50 citation statements)

References 34 publications

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“…Exposure to GIN parasites in the current study impaired calf growth in both genotypes, as shown by the significant differences in BWG between dewormed (L) and experimentally infected (H) animals, a finding in agreement with previous studies with FSG dairy calves in Sweden (Dimander et al, 2003;Larsson et al, 2007;Höglund et al, 2013a). Although not significant, the penalty of parasitism (L vs H) in the BW of calves was more pronounced in C (39 kg) than in D (24 kg) calves, indicating that the impact of GIN infection on growth may have been more severe in the crossbreds than in the dairy calves.…”

Section: Discussionsupporting

confidence: 81%

Weight gain and resistance to gastrointestinal nematode infections in two genetically diverse groups of cattle

Höglund

Hessle

Zaralis

et al. 2018

Veterinary Parasitology

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Section: Discussionsupporting

confidence: 81%

Weight gain and resistance to gastrointestinal nematode infections in two genetically diverse groups of cattle

Höglund

Hessle

Zaralis

et al. 2018

Veterinary Parasitology

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“…Although this combination of anthelmintic treatment with a move of animals to pastures with low infectivity proved to be highly effective from a parasite control standpoint, it later became apparent in certain localities that these procedures selected strongly for anthelmintic resistance in surviving parasites * . However, it has been shown that not all grazing management strategies to control parasites need to be accompanied by anthelmintic treatment to achieve extremely good levels of parasite control for either young cattle [5,43] or sheep [44]. A word of caution also needs to be raised on relying on long-term sheep/cattle interchange systems: there have been reports that parasites primarily of cattle might show an increased ability to infect sheep and cause clinical disease [42].…”

Section: Nutraceuticalsmentioning

confidence: 99%

“…The most profound effects of parasitism are on sub-clinical production loss (i.e. not obvious by visual appraisal) [5], of which farmers -or their advisers -are unlikely to be aware. Assessments of animal health issues associated with organic farming are often based on farmers' perceptions in questionnaires or surveys [6,7], rather than on detailed veterinary investigation.…”

mentioning

confidence: 99%

Nematode control in ‘green’ ruminant production systems

Waller¹,

Thamsborg²

2004

Trends in Parasitology

139

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“…In literature, most studies assess the impact of GI nematodes on partial productivity measures such as milk production per cow (Charlier et al, 2009;Blanco-Penedo et al, 2012), daily weight gain (Dimander et al, 2003) and reproductive performance (Sanchez and Dohoo, 2002;Sithole et al, 2006). However, analysing the effect of GI nematodes and control measures on the whole-farm performance requires a more integrative approach (Morgan et al, 2013;van der Voort et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The relation between input-output transformation and gastrointestinal nematode infections on dairy farms

Voort¹,

Meensel²,

Lauwers

et al. 2016

animal

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Efficiency analysis is used for assessing links between technical efficiency (TE) of livestock farms and animal diseases. However, previous studies often do not make the link with the allocation of inputs and mainly present average effects that ignore the often huge differences among farms. In this paper, we studied the relationship between exposure to gastrointestinal (GI) nematode infections, the TE and the input allocation on dairy farms. Although the traditional cost allocative efficiency (CAE) indicator adequately measures how a given input allocation differs from the cost-minimising input allocation, they do not represent the unique input allocation of farms. Similar CAE scores may be obtained for farms with different input allocations. Therefore, we propose an adjusted allocative efficiency index (AAEI) to measure the unique input allocation of farms. Combining this AAEI with the TE score allows determining the unique input-output position of each farm. The method is illustrated by estimating efficiency scores using data envelopment analysis (DEA) on a sample of 152 dairy farms in Flanders for which both accountancy and parasitic monitoring data were available. Three groups of farms with a different input-output position can be distinguished based on cluster analysis: (1) technically inefficient farms, with a relatively low use of concentrates per 100 l milk and a high exposure to infection, (2) farms with an intermediate TE, relatively high use of concentrates per 100 l milk and a low exposure to infection, (3) farms with the highest TE, relatively low roughage use per 100 l milk and a relatively high exposure to infection. Correlation analysis indicates for each group how the level of exposure to GI nematodes is associated or not with improved economic performance. The results suggest that improving both the economic performance and exposure to infection seems only of interest for highly TE farms. The findings indicate that current farm recommendations regarding GI nematode infections could be improved by also accounting for the allocation of inputs on the farm.Keywords: data envelopment analysis, cluster analysis, Ostertagia ostertagi, input allocation, technical efficiency ImplicationThis study relates efficiency of inputs used to produce milk on dairy farms with the exposure to gastrointestinal nematodes. A new measure was developed to identify the farm's unique allocation of inputs. Together with the technical efficiency (TE) score, this allowed to cluster farms on their unique input-output position. We found that the relation between the level of exposure to infection, input allocation, TE and the economic farm performance was specific for the different clusters. This emphasises the importance of considering farm specificity in input-output transformation when assessing the farm economic performance in relation to infection.

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Evaluation of gastro-intestinal nematode parasite control strategies for first-season grazing cattle in Sweden

Cited by 83 publications

References 34 publications

Weight gain and resistance to gastrointestinal nematode infections in two genetically diverse groups of cattle

Weight gain and resistance to gastrointestinal nematode infections in two genetically diverse groups of cattle

Nematode control in ‘green’ ruminant production systems

The relation between input-output transformation and gastrointestinal nematode infections on dairy farms

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