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Titolo:
A single pasture limited treatment approach to estimate production loss from gastrointestinal nematodes in grazing stocker cattle
Autore:
Epperson, WB; Kenzy, BD; Mertz, K; Hildreth, MB;
Indirizzi:
S Dakota State Univ, Coll Agr & Biol Sci, Dept Vet Sci, Brookings, SD 57007 USA S Dakota State Univ Brookings SD USA 57007 t Sci, Brookings, SD 57007 USA S Dakota State Univ, Coll Agr & Biol Sci, Dept Anim & Range Sci, Brookings, SD 57007 USA S Dakota State Univ Brookings SD USA 57007 e Sci, Brookings, SD 57007 USA S Dakota State Univ, Coll Agr & Biol Sci, Dept Biol & Microbiol, Brookings, SD 57007 USA S Dakota State Univ Brookings SD USA 57007 obiol, Brookings, SD 57007 USA
Titolo Testata:
VETERINARY PARASITOLOGY
fascicolo: 4, volume: 97, anno: 2001,
pagine: 269 - 276
SICI:
0304-4017(20010628)97:4<269:ASPLTA>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUSTAINED-RELEASE BOLUS; OSTERTAGIA-OSTERTAGI; PARASITE CONTROL; WYOMING CATTLE; EPIZOOTIOLOGY; HERD;
Keywords:
beef cattle; stocker calves; nematodes; weight gain; sub-clinical parasitism; ivermectin SR bolus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Hildreth, MB S Dakota State Univ, Coll Agr & Biol Sci, Dept Vet Sci, Brookings, SD 57007 USA S Dakota State Univ Brookings SD USA 57007 ngs, SD 57007 USA
Citazione:
W.B. Epperson et al., "A single pasture limited treatment approach to estimate production loss from gastrointestinal nematodes in grazing stocker cattle", VET PARASIT, 97(4), 2001, pp. 269-276

Abstract

The objective of this study was to evaluate the use of a single pasture, limited treatment methodology to assess the impact of gastrointestinal nematodes on weight gain in grazing cattle. From a group of 450 British crossbred, yearling spayed heifers, 60 animals were randomly selected (prospective randomization) prior to placement on summer pasture. Each of these 60 animals was weighed, a fecal sample obtained for nematode egg count and a uniquely numbered ear tag applied. A randomly assigned group of 30 received treatment with one ivermectin sustained release bolus, while the remaining 30 served as non-treated controls. The treatment and control groups rejoined theremaining non-treated 390 animals, and were grazed as a single group for 165 days. At grazing conclusion, treatment and control cattle were individually weighed, and fecal samples obtained for nematode egg counts. Treatment was associated with a 0.064 kg per grazing day gain increase, or a 10 kg increase over the grazing season (P = 0.02). Nematade egg counts at grazing initiation were not different between treatment and control (P = 0.30), though egg counts in treated cattle at study end were lower than control (P < 0.0001). Results of this study support the use of a single pasture limited treatment approach far measuring the effect that internal nematodes have on weight gain in grazing cattle under commercial range conditions. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 25/01/20 alle ore 18:48:49