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Effect of gastro-intestinal nematode infection on sheep performance: a systematic review and meta-analysis

Overview of attention for article published in Parasites & Vectors, October 2015
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  • Above-average Attention Score compared to outputs of the same age (52nd percentile)
  • Good Attention Score compared to outputs of the same age and source (68th percentile)

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175 Dimensions

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Title
Effect of gastro-intestinal nematode infection on sheep performance: a systematic review and meta-analysis
Published in
Parasites & Vectors, October 2015
DOI 10.1186/s13071-015-1164-z
Pubmed ID
Authors

Fabien Mavrot, Hubertus Hertzberg, Paul Torgerson

Abstract

Gastrointestinal nematode (GIN) infections are common in domestic sheep and impact directly and indirectly on the health of infected animals as well as on the associated economic production. In this study, we aim at summarizing the current knowledge on the influence of GIN infections on sheep production by conducting a systematic review. A subsequent meta-analysis of relevant studies was performed to provide an estimate of the effect of GIN infections on weight gain, wool production and milk yield. A literature search was performed on the CAB, Pubmed and Web of Science database for the period 1960-2012. Inclusion criteria were: 1) Measurement of at least one production parameter. 2) Comparison between groups of sheep with different nematode burdens. 3) Same conditions regarding all aspects except parasite burden between groups. 4) Quantitative measurements of one or more production traits. Altogether, 88 studies describing 218 trials were included in this review. The majority of studies (86 %) reported that GIN infections had a negative effect on production but this was reported to be statistically significant in only 43 % of the studies. Meta-analysis indicated that performances of sheep infected with nematodes was 85, 90 and 78 % of the performance in uninfected individuals for weight gain, wool production and milk yield respectively. Our results suggest a possible reporting bias or small study effect for the estimation of the impact of GIN infections on weight gain. Finally, a general linear model provided an estimate for the decrease in weight gain in relation to the increase in faecal egg count of nematodes. This study underlines the importance of GIN infections for sheep production and highlights the need to improve parasite management in sheep, in particular in face of challenges such as anthelmintic resistance.

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X Demographics

The data shown below were collected from the profiles of 5 X users who shared this research output. Click here to find out more about how the information was compiled.
Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 261 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Finland 1 <1%
United States 1 <1%
Norway 1 <1%
Brazil 1 <1%
Unknown 257 98%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 32 12%
Student > Master 31 12%
Student > Bachelor 31 12%
Researcher 29 11%
Student > Doctoral Student 14 5%
Other 47 18%
Unknown 77 30%
Readers by discipline Count As %
Agricultural and Biological Sciences 67 26%
Veterinary Science and Veterinary Medicine 52 20%
Biochemistry, Genetics and Molecular Biology 13 5%
Unspecified 8 3%
Medicine and Dentistry 7 3%
Other 24 9%
Unknown 90 34%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 06 February 2016.
All research outputs
#13,374,619
of 22,831,537 outputs
Outputs from Parasites & Vectors
#2,414
of 5,465 outputs
Outputs of similar age
#133,346
of 283,725 outputs
Outputs of similar age from Parasites & Vectors
#47
of 162 outputs
Altmetric has tracked 22,831,537 research outputs across all sources so far. This one is in the 41st percentile – i.e., 41% of other outputs scored the same or lower than it.
So far Altmetric has tracked 5,465 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.7. This one has gotten more attention than average, scoring higher than 55% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 283,725 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 52% of its contemporaries.
We're also able to compare this research output to 162 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 68% of its contemporaries.