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Effects of anthelmintic treatment on milk production in Sarda dairy ewes naturally infected by gastrointestinal nematodes

Sechi, Stefania and Giobbe, Marianna and Sanna, Giuliana and Casu, Sara and Carta, Antonello and Scala, Antonio (2010) Effects of anthelmintic treatment on milk production in Sarda dairy ewes naturally infected by gastrointestinal nematodes. Small Ruminant Research, Vol. 88 (2-3), p. 145-150. ISSN 0921-4488. Article.

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DOI: 10.1016/j.smallrumres.2009.12.022

Abstract

The objective of this work was to investigate the effects of a single anthelmintic treatment on milk production. In 2008, in a flock of Sarda ewes naturally infected by gastrointestinal nematodes, 162 adult and 72 primiparous ewes were allocated into four groups. For each age class, one group was drenched with albendazole after lamb weaning whilst the other was left untreated as control. The efficacy of single anthelmintic treatment at the beginning of lactation was obtained by a faecal egg count reduction test. The effect of drenching on milk yield and components was studied both using single test date and lactation records. After 1 month geometric mean of eggs per gram of treated ewes decreased up to 1% of the initial value (3.40 eggs/g versus 322.63 eggs/g in primiparous and 2.14 eggs/g versus 312.70 eggs/g in adult ewes). The anthelmintic treatment showed a significant effect only on lactation milk yield of treated adult ewes that produced 19.2 L/year more than control ewes. Production level was investigated as a criterion to apply targeted selective treatment. High producer multiparous ewes produced 32.7 L/year more than control ones. Overall results confirm a beneficial effect of anthelmintic treatment on milk production without any detrimental effect on milk composition only on adult ewes markedly if high producers. Thus, depending on milk price and the required length of the period of discarded milk, the increased milk yield can counterbalance treatment's costs.

Item Type:Article
ID Code:5667
Status:Published
Refereed:Yes
Uncontrolled Keywords:Sheep, milk production, gastrointestinal nematodes, anthelmintic treatment
Subjects:Area 07 - Scienze agrarie e veterinarie > VET/06 Parassitologia e malattie parassitarie degli animali
Divisions:001 Università di Sassari > 01 Dipartimenti > Biologia animale
002 Altri enti e centri di ricerca del Nord Sardegna > AGRIS Sardegna, Olmedo > Dipartimento per la ricerca nelle produzioni animali > Settore genetica e biotecnologie
Publisher:Elsevier
ISSN:0921-4488
Copyright Holders:© 2009 Elsevier
Additional Information:This paper is part of a special issue entitled SIPAOC Congress 2008, Trezzo sull’Adda (MI), Italy, from 17 to 20 September 2008, guest edited by Antonello Carta, Giovanni Garippa and Giuseppe Moniello.
Deposited On:08 Mar 2011 11:02

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