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Trichostrongylus and Haemonchus anthelmintic resistance in naturally infected sheep from southern Brazil Anais da ABC (AABC)
KLAUCK,VANDERLEI; PAZINATO,RAFAEL; LOPES,LEANDRO S.; CUCCO,DIEGO C.; LIMA,HORACIO L. DE; VOLPATO,ANDREIA; RADAVELLI,WILLIAN M.; STEFANI,LENITA C.M.; SILVA,ALEKSANDRO S. DA.
The anthelmintic resistance in small ruminants is a common problem and concern worldwide. The aim of this study was to verify anthelmintic treatment efficacy in naturally infected sheep. This study was conducted on nine herds that used the same anthelmintic management for over a year. In each farm, the animals were divided into two groups: untreated control group (n = 5) and treated (n = 10) according to the number of eggs per gram of feces (EPG). The treatment effect was checked based on EPG results and larval culture performed before treatment and 10 days after treatment. Significant differences were not observed (P> 0.05) on EPG results between untreated and treated groups. The coproculture showed that the animals were infected primarily byHaemonchus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anthelmintic resistance; Albendazole; Closantel; Levamizol; Helminths.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200777
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Resistance of gastrointestinal nematodes to anthelmintics in sheep (Ovis aries) BABT
Thomaz-Soccol,Vanete; Souza,Felipe Pohl de; Sotomaior,Cristina; Castro,Edilene Alcântara; Milczewski,Viviane; Mocelin,Giovani; Silva,Maria do Carmo Pessoa e.
The fecal egg count reduction test (FECRT) was used in a survey for anthelmintic resistance in 42 sheep farms, in five different regions in Paraná State, Brazil between July 1996 - July 2000. Animals with natural infection were tested. Five drugs were used individually or in combination - benzimidazole, imidazothiazole, ivermectin, milbemicina and closantel. Results showed that the prevalence of resistance to all anthelmintic was as high as 88.1% for benzimidazoles (oxfendazole), 78.6% for ivermectin, 56.4% for closantel, 38.7% for closantel + oxfendazole, 38% for levamisole, and 23.6% for moxidectin. There was multiple resistance in all tested farms. The most important infective larvae recovered from culture were Haemonchus contortus and Trichostrongylus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gastrointestinal parasite; Sheep nematode; Ovis aries; Anthelmintic resistance; FECRT.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000100006
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The value of refugia in managing anthelmintic resistance: a modelling approach AgEcon
Pech, Caris L.; Doole, Graeme J.; Pluske, Johanna M..
The increasing prevalence of anthelmintic (drench) resistance in gastrointestinal parasite populations is decreasing the profitability of the sheep industry in Western Australia (WA). A strategy, referred to as refugia management, has the potential to delay the development of resistant parasites by not exposing a proportion of the worm population to chemical control. A dynamic bioeconomic model is used to assess the economic value of refugia for management of the worm species Teladorsagia circumcincta and Macrocyclic Lactone drenches in Western Australian sheep flocks. A low rate of refugia (2 per cent) is most profitable under standard circumstances because it slows the development of resistance, but also reduces the cost accruing to production losses...
Tipo: Conference Paper or Presentation Palavras-chave: Anthelmintic resistance; Bioeconomic model; Gastrointestinal parasites; Refugia; Sheep; Teladorsagia circumcincta..
Ano: 2009 URL: http://purl.umn.edu/48166
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