The prevalence of anthelmintic resistance in nematode parasites of sheep in Southern Latin America: Argentina

Sixty-five sheep farms in the northern provinces of Buenos Aires, Entre Rios, Corrientes, Cordoba and Sante Fe were used in this survey on anthelmintic resistance. Anthelmintic groups tested were the benzimidazoles, levamisole, the combination levamisole + benzimidazole product and the avermectins....

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Bibliographic Details
Published in:Veterinary parasitology 1996-04, Vol.62 (3), p.189-197
Main Authors: Eddi, C., Caracostantogolo, J., Peña, M., Schapiro, J., Marangunich, L., Waller, P.J., Hansen, J.W.
Format: Article
Language:English
Subjects:
Agriculture
Animals
ANTHELMINTHIQUE
ANTHELMINTICS
Anthelmintics - therapeutic use
ANTIHELMINTICOS
ARGENTINA
ARGENTINE
Demography
Drug Resistance, Multiple
HAEMONCHUS CONTORTUS
Nematoda - drug effects
Nematode Infections - drug therapy
Nematode Infections - veterinary
Osteragia spp
OSTERTAGIA
OVIN
OVINOS
Resistance
RESISTANCE AUX PRODUITS CHIMIQUES
RESISTANCE TO CHEMICALS
RESISTENCIA A PRODUCTOS QUIMICOS
SHEEP
Sheep - parasitology
Sheep Diseases
Sheep-Nematoda
TRICHOSTRONGYLUS
Trichostrongylus spp
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Summary:Sixty-five sheep farms in the northern provinces of Buenos Aires, Entre Rios, Corrientes, Cordoba and Sante Fe were used in this survey on anthelmintic resistance. Anthelmintic groups tested were the benzimidazoles, levamisole, the combination levamisole + benzimidazole product and the avermectins. The overall level of resistance was 46% of properties, with resistance to the individual drug groups being 40%, 22%, 11% and 6%, respectively. On a large proportion of farms the resistance recorded was to two, or more, anthelmintic groups. Haemonchus contortus, Ostertagia spp. and Trichostrongylus spp. were the most abundant parasite species recorded. Resistance was greatest in the province of Corrientes where the frequency of treatment is generally high due to the endemic nature of H. contortus. Management practices were also important with resistance greatest on farms where frequent drenching is carried out and on farms carrying only sleep.
ISSN:0304-4017
1873-2550
DOI:10.1016/0304-4017(95)00905-1