TY - CHAP

T1 - Addressing sustainable sheep farming: Application of a targeted selective treatment approach for anthelmintic use on a commercial farm

AU - Busin, V.

AU - Kenyon, F.

AU - Laing, N.

AU - Denwood, Matthew

AU - McBean, D.

AU - Sargison, N. D.

AU - Ellis, K.

PY - 2013

Y1 - 2013

N2 - Sustainable control of nematode parasites in small ruminant production is a worldwide ambition. Development of anthelmintic resistance can severely impair small ruminant production. A practical approach to reduce selection pressure for anthelmintic resistance is to treat only a proportion of the flock (Targeted Selective Treatment), leaving a proportion of the nematode population untreated. The aim of this study was to compare the sustainability and efficacy of a performance-based marker, the Happy Factor???, a monitor of nutrient utilisation efficiency, with a routine whole flock anthelmintic treatment. In a commercial flock in the South West of Scotland, 183 Texel cross lambs were split into two matched but co-grazing groups: one group managed as routinely for the farm (RT group) and the other subjected to targeted selective treatment (TST group). All lambs from the RT group were drenched every 6 weeks during the grazing season, while anthelmintic administration in the TST group was restricted to animals that failed to reach pre-determined weight gain targets, based on an estimate of their efficiency of gross energy utilisation. Animal performance and parasitological data were recorded every two weeks. In the 20 week period of the study, anthelmintic treatments were reduced by approximately 50% in the TST group compared to a routine anthelmintic administration that would have been applied, whilst epg counts were always

AB - Sustainable control of nematode parasites in small ruminant production is a worldwide ambition. Development of anthelmintic resistance can severely impair small ruminant production. A practical approach to reduce selection pressure for anthelmintic resistance is to treat only a proportion of the flock (Targeted Selective Treatment), leaving a proportion of the nematode population untreated. The aim of this study was to compare the sustainability and efficacy of a performance-based marker, the Happy Factor???, a monitor of nutrient utilisation efficiency, with a routine whole flock anthelmintic treatment. In a commercial flock in the South West of Scotland, 183 Texel cross lambs were split into two matched but co-grazing groups: one group managed as routinely for the farm (RT group) and the other subjected to targeted selective treatment (TST group). All lambs from the RT group were drenched every 6 weeks during the grazing season, while anthelmintic administration in the TST group was restricted to animals that failed to reach pre-determined weight gain targets, based on an estimate of their efficiency of gross energy utilisation. Animal performance and parasitological data were recorded every two weeks. In the 20 week period of the study, anthelmintic treatments were reduced by approximately 50% in the TST group compared to a routine anthelmintic administration that would have been applied, whilst epg counts were always

KW - Anthelmintic resistance

KW - Growth

KW - Lamb

KW - Nematode

KW - Sheep

KW - Targeted selective treatment

U2 - 10.1016/j.smallrumres.2012.11.013

DO - 10.1016/j.smallrumres.2012.11.013

M3 - Book chapter

SN - 09214488

SP - 100

EP - 103

BT - Small Ruminant Research

ER -