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Felippelli G, Cruz BC, Gomes LVC, Lopes WDZ, Teixeira WFP, Maciel WG, Buzzulini C, Bichuette MA, Campos GP, Soares VE, Bergamasco PLF, de Oliveira GP, da Costa AJ. Susceptibility of helminth species from horses against different chemical compounds in Brazil. Vet Parasitol 2015; 212:232-8. [PMID: 26277565 DOI: 10.1016/j.vetpar.2015.07.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 07/24/2015] [Accepted: 07/26/2015] [Indexed: 10/23/2022]
Abstract
By means of parasitological necropsies, the present study aimed to evaluate, in six experiments, the degree of susceptibility or resistance of different helminth species which naturally infect horses to ivermectin 0.2 mg/kg, abamectin 0.2 mg/kg, moxidectin 0.4 mg/kg, trichlorfon 35 mg/kg, ivermectin 0.2 mg/kg+praziquantel 2.5 mg/kg, abamectin 0.2 mg/kg+praziquantel 2.5 mg/kg and ivermectin 0.2 mg/kg+6.6 mg/kg pyrantel. At experimental day zero, the horses were allocated to treatment groups based on average counts of strongylid eggs per gram of feces (EPG) obtained on days -3, -2 and -1. Oxyuris sp. infections were confirmed as positive or negative. All the animals in the six experiments were naturally infected by this helminth species. Each group (control or treated) consisted of six animals. All the assessed Habronema muscae populations analyzed were susceptible to ivermectin, abamectin and moxidectin. Of the six Trichostrongylus axei populations, four were susceptible to ivermectin, abamectin, moxidectin, trichlorfon and ivermectin+praziquantel, and two were resistant to abamectin+praziquantel and ivermectin+pyrantel. Both Strongyloides westeri populations analyzed were susceptible to ivermectin, abamectin, moxidectin and abamectin+praziquantel. For O. equi, resistance was found in four different populations treated with ivermectin, abamectin, moxidectin, trichlorfon and ivermectin+praziquantel. Only combinations of abamectin+praziquantel and ivermectin+pyrantel were effective against this parasite species. All the large strongyles diagnosed in the present study (Strongyus edentatus, Strongyus vulgaris and Triodontophorus serratus) were susceptible to all the chemicals tested, with the exception of trichlorfon. Of the Cyathostominae populations, one was diagnosed as resistant to ivermectin and another to trichlorfon. The remaining populations from this nematode group were considered to be sensitive to ivermectin, abamectin, moxidectin, ivermectin+praziquantel, abamectin+praziquantel and ivermectin+pyrantel. New studies should be performed in different regions to evaluate the efficacy of trichlorfon in others field populations of helminthes.
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Affiliation(s)
- Gustavo Felippelli
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Breno Cayeiro Cruz
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Lucas Vinicius Costa Gomes
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Welber Daniel Zanetti Lopes
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil; Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO 74605-050, Brazil..
| | - Weslen Fabrício Pires Teixeira
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Willian Giquelin Maciel
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Carolina Buzzulini
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Murilo Abud Bichuette
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Gabriel Pimentel Campos
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Vando Edésio Soares
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Paula Luzia Formigoni Bergamasco
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Gilson Pereira de Oliveira
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
| | - Alvimar José da Costa
- CPPAR - Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, Via de acesso Prof. Paulo Donatto Castellane, s/n°. CEP: 14884-900, Jaboticabal, São Paulo, Brazil
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Gomes LVC, Lopes WDZ, Cruz BC, Teixeira WF, Felippelli G, Maciel WG, Bichuette MA, Ruivo MA, Alcantara Colli MH, Carvalho RS, Martinez AC, Soares VE, da Costa AJ. Acaricidal effects of fluazuron (2.5 mg/kg) and a combination of fluazuron (1.6 mg/kg) + ivermectin (0.63 mg/kg), administered at different routes, against Rhipicephalus (Boophilus) microplus parasitizing cattle. Exp Parasitol 2015; 153:22-8. [DOI: 10.1016/j.exppara.2015.02.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 02/09/2015] [Accepted: 02/11/2015] [Indexed: 10/23/2022]
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