title: Effects of Haematobia irritans infestation on weight gain of Nelore calves assessed with different antiparasitic treatment schemes.
abstract: Effects of Haematobia irritans infestation on weight gain of 18 to 20 months old non-castrated Nelore calves, were investigated, under field conditions, using different antiparasitic treatments. Sixty animals were divided in three groups, with 20 bovines each: T01 (untreated control); T02 (treated with Cypermethrin 15 g+Chlorpyriphos 25 g+Citronellal 1 g, as a whole body spray, on days 0, 30, 60, 90 and 120 post-treatment); and T03 (treated on day zero with an ear tag impregnated with Diazinon 6g on the left ear). Counts of H. irritans were conducted on day 30, 60, 90, 120 and 150 post-treatment (DPT). On the same experimental dates, animals were individually weighed, seeking to evaluate the effects of parasitism on the development of animals in each group. From this study it is concluded that T03 had significantly higher efficacy (>90%, till 90 DPT), based on H. irritans fly counts, compared to T02 which showed little or no effect. At the specific conditions of the present study, an average of approximately 90 flies (mean difference of flycounts between groups T01 and T03) was associated with a difference of 20 kg/animal in 150 days.
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
authors.forename: WillianGiquelin
authors.initials: W
authors.lastname: Maciel
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil; Universidade Federal de Goiás, Faculdade de Medicina Veterinária, Regional de Jataí, BR-364 Km 192, Parque Industrial, Jataí, GO 75801-615, Brazil.. Electronic address: wdzlopes@hotmail.com.
authors.forename: Welber Daniel Zanetti
authors.initials: WD
authors.lastname: Lopes
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
authors.forename: BrenoCayeiro
authors.initials: B
authors.lastname: Cruz
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
authors.forename: WeslenFabricioPires
authors.initials: W
authors.lastname: Teixeira
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
authors.forename: Gustavo
authors.initials: G
authors.lastname: Felippelli
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
authors.forename: Claudio AlessandroMassamitsu
authors.initials: CA
authors.lastname: Sakamoto
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
authors.forename: Flávia Carolina
authors.initials: FC
authors.lastname: Fávero
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
authors.forename: Carolina
authors.initials: C
authors.lastname: Buzzulini
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil; UNICASTELO, Universidade Camilo Castelo Branco, Campus de Descalvado, Av. Hilário da Silva Passo 950, Descalvado, SP 13690-970, Brazil.
authors.forename: VandoEdésio
authors.initials: V
authors.lastname: Soares
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
authors.forename: Lucas ViníciusCosta
authors.initials: LV
authors.lastname: Gomes
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
authors.forename: MuriloAbud
authors.initials: M
authors.lastname: Bichuette
authors.affiliation: CPPAR, Animal Health Research Center, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
authors.forename: Alvimar José
authors.initials: AJ
authors.lastname: da Costa
mesh_terms: D000818:Animals; D000977:Antiparasitic Agents / Q000008:administration & dosage; D001522:Behavior, Animal; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology* / Q000517:prevention & control; D004390:Chlorpyrifos / Q000008:administration & dosage*; D031743:Cymbopogon; D003976:Diazinon / Q000008:administration & dosage*; D004338:Drug Combinations; D007306:Insecticides / Q000008:administration & dosage*; D008297:Male; D009117:Muscidae / Q000472:pathogenicity*; D011722:Pyrethrins / Q000008:administration & dosage*; D011897:Random Allocation; D015430:Weight Gain
chemical_list: D000977:Antiparasitic Agents; D004338:Drug Combinations; D007306:Insecticides; D011722:Pyrethrins; C017160:cypermethrin; D004390:Chlorpyrifos; D003976:Diazinon
keywords: Bovines; Horn flies; Weight gain