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Cruz BC, de Lima Mendes AF, Maciel WG, Dos Santos IB, Gomes LVC, Felippelli G, Teixeira WFP, Ferreira LL, Soares VE, Lopes WDZ, da Costa AJ, de Oliveira GP. Biological parameters for Rhipicephalus microplus in the field and laboratory and estimation of its annual number of generations in a tropical region. Parasitol Res 2020; 119:2421-2430. [PMID: 32548738 DOI: 10.1007/s00436-020-06758-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 06/04/2020] [Indexed: 11/25/2022]
Abstract
The present study aimed to evaluate biological parameters of Rhipicephalus microplus in the non-parasitic phase in both field and laboratory conditions. It also aimed to assess correlations between duration (in days) of these parameters and climatic variables (humidity, rainfall, and soil temperature) and to estimate the annual number of generations of R. microplus in a tropical region. The non-parasitic phase of R. microplus in field and laboratory conditions was evaluated throughout the course of two years. A pasture was infested with engorged female of R. microplus, and biological parameters, including female pre-oviposition, female oviposition, egg mass incubation, larval pre-hatching phase, larval maturation, and larval longevity, were evaluated concomitantly with the collection of data on climatic conditions. The same parameters were also evaluated in a climatized chamber in the laboratory. The total duration of the non-parasitic phase in the field was longer in the dry season (1st and 4th life-cycle repetitions) than in the rainy season (2nd, 3rd, and 5th repetitions). Tick biological parameters for the non-parasitic phase in the laboratory were similar to those obtained in the field during the rainy season. The evaluated biological parameters were influenced mainly by environmental and ground-level temperatures, which modified egg mass incubation, larval pre-hatching, and larval longevity periods and, consequently, the total duration of the non-parasitic phase of the tick. The annual number of generations for the tick was estimated at five per year, which is alarming because it represents an increase, and so new studies into strategic control are needed.
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Affiliation(s)
- Breno Cayeiro Cruz
- School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil
| | | | - Willian Giquelin Maciel
- School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil
| | - Isabella Barbosa Dos Santos
- School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil
| | - Lucas Vinicius Costa Gomes
- School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil
| | - Gustavo Felippelli
- School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil
| | | | - Lorena Lopes Ferreira
- Department of Medicine Veterinary Preventive, School of Veterinary, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Welber Daniel Zanetti Lopes
- School of Veterinary and Zootechnics, Federal University of Goiás, Goiânia, Goiás, Brazil.
- Department of Biosciences and Technologies, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Goiás, Brazil.
| | - Alvimar José da Costa
- School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil
| | - Gilson Pereira de Oliveira
- School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil
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Dos Santos IB, Giquelin Maciel W, Felippelli G, Barbosa Toscano JH, Cayeiro Cruz B, De Souza Chagas AC, Soares VE, Zanetti Lopes WD, da Costa AJ, de Oliveira GP. Viability of Haemonchus placei parasitism in experimentally infected young goats. Vet Parasitol 2019; 271:64-67. [PMID: 31303206 DOI: 10.1016/j.vetpar.2019.06.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 06/17/2019] [Accepted: 06/18/2019] [Indexed: 10/26/2022]
Abstract
The present study aimed to evaluate the viability of Haemonchus placei parasitism in experimentally infected goats. For that, 14 75 days old kids male Saanen kids were placed in one of the four experimental groups: GI - infected with 5000 H. placei L3 (n = 4); GII - infected with 5000 H. contortus L3 (n = 4); GIII - infected with 2500 H. contortus L3 + 2500 H. placei L3 (n = 4), and GIV - control, inoculated with distilled water (n = 2). Each kid received, orally, the infective dose in a single inoculum. Based on daily fecal egg counts, the average pre-patent period was determined as 24 days for H. contortus, and 31 days for H. placei. Regarding the Haemonchus spp. recovered at necropsy, the experimental groups GI, GII, and GIII had, respectively, an average of 25.5, 619.5, and 724.75 (120 H. placei, and 604.75 H. contortus) adult specimens, and no immature forms. Under the conditions of this study, the viability of goat infection by H. placei was confirmed, although, with low susceptibility. Nevertheless, the parasitism of this helminth species was more intense when associated with H. contortus. This fact indicates that in common grazing between cattle and young goats, when the latter end up ingesting both Haemonhcus species, especially in a mixed infection, H. placei may also parasitize them.
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Affiliation(s)
- Isabella Barbosa Dos Santos
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso Prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brasil.
| | - Willian Giquelin Maciel
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso Prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brasil
| | - Gustavo Felippelli
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso Prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brasil
| | - João Henrique Barbosa Toscano
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso Prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brasil
| | - Breno Cayeiro Cruz
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso Prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brasil
| | - Ana Carolina De Souza Chagas
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso Prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brasil; Embrapa Pecuária Sudeste, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Rodovia Washington Luis, Km 234, CEP, 15379-970, São Carlos, SP, Brasil
| | - Vando Edésio Soares
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso Prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brasil
| | - Welber Daniel Zanetti Lopes
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso Prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brasil; Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brasil.
| | - Alvimar José da Costa
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso Prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brasil
| | - Gilson Pereira de Oliveira
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso Prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brasil
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de Castro Rodrigues D, Buzullini C, Pereira TA, Curz BC, Gomes LVC, Soares VE, Bastos TSA, Couto LFM, Lopes WDZ, de Oliveira GP, Costa AJD. Avermectin toxicity in bovines less than thirty days old. Res Vet Sci 2018; 118:403-412. [DOI: 10.1016/j.rvsc.2018.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 03/13/2018] [Accepted: 04/13/2018] [Indexed: 01/11/2023]
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Maciel WG, Lopes WDZ, Cruz BC, Gomes LVC, Teixeira WFP, Buzzulini C, Bichuette MA, Campos GP, Felippelli G, Soares VE, de Oliveira GP, da Costa AJ. Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests. Vet Parasitol 2015; 214:233-41. [DOI: 10.1016/j.vetpar.2015.10.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 10/22/2015] [Accepted: 10/23/2015] [Indexed: 10/22/2022]
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Santana LF, Gaspar RC, Rossi GAM, Nascentes GAN, Rodrigues EA, Oliveira GPD, Costa AJD. CLINICAL, HEMATOLOGICAL, AND SEMINAL ALTERATIONS AND PARASITEMIA OF MALE GOATS EXPERIMENTALLY INFECTED WITH Toxoplasma gondii. Ciênc anim bras 2015. [DOI: 10.1590/1089-6891v16i326476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
<title>Abstract:</title><p>Toxoplasmosis is a parasitic disease that affects reproductive performance in small ruminants. Although the <italic>Toxoplasma gondii</italic> life cycle is well understood since 1960s, several aspects related to its infection remains unclear. This study aimed to determine the effects of <italic>T. gondii</italic>experimental infection, and the influence on clinical, hematological, parasitemia and seminal parameters in male goats. Nine animals were selected and distributed in three groups: GI (n=3) – control group (placebo) orally inoculated with saline solution; GII (n=3) – subcutaneously inoculated with 1 x 106 tachyzoites of <italic>T. gondii</italic>; and GIII (n=3) – orally inoculated with 2 x 10<sup>5</sup> oocysts of <italic>T. gondii</italic>. After that, clinical exams, serological tests, hemograms, parasitemia determination and semen evaluation were performed. Reciprocal serological titers had highest values of 4096 in both groups of goats infected with <italic>T. gondii,</italic>confirming the experimental infections. However, we could not observe clinical changes (except for mild hyperthermia on the 5<sup>th</sup> DAI in one of the animals - GIII) or in hematimetric parameters. Although there were some statistically significant changes (P <0.05) on the percentages of pathology and sperm concentrations in some of the dates between the infected and control animals, these changes were not associated with toxoplasmic infection. Infection was associated with animal handling methods and environmental factors.</p>
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Teixeira WFP, Felippelli G, Cruz BC, Maciel WG, Fávero FC, Gomes LVC, Buzzulini C, Prando L, Bichuette MA, Lopes WDZ, Oliveira GPD, Costa AJD. Endoparasites of horses from the Formiga city, located in center-west region of the state of Minas Gerais, Brazil. Rev Bras Parasitol Vet 2014; 23:534-8. [PMID: 25517536 DOI: 10.1590/s1984-29612014072] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 07/25/2014] [Indexed: 11/22/2022]
Abstract
With the aim of studying the endoparasite fauna of horses from the Formiga city, located in center-west region of the state of Minas Gerais, 25 animals that were naturally infected with helminths were evaluated. By means of parasitological necropsies, different endoparasites were found. The subfamily Cyathostominae presented the highest incidence, followed by Trichostrongylus axei, Oxyuris equi, Triodontophorus serratus, Strongyloides westeri, Strongylus edentatus, Habronema muscae, Parascaris equorum, Probstmayria vivipara, Strongylus vulgaris, Gasterophilus nasalis, Anoplocephala magna and Anoplocephala perfoliata. In the present study, if the species Probstmayria vivipara was not considered in the prevalence, the frequency of Cyathostominae was equivalent to 94.85%. The results obtained in this study allowed us to detect and identify different species of helminths in horses, and confirmed the high incidence of nematodes belonging to the subfamily Cyathostominae in the center-west region of Minas Gerais.
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Affiliation(s)
- Weslen Fabricio Pires Teixeira
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Gustavo Felippelli
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Breno Cayeiro Cruz
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Willian Giquelin Maciel
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Flávia Carolina Fávero
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Lucas Vinicius Costa Gomes
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Carolina Buzzulini
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Luciana Prando
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Murilo Abud Bichuette
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Welber Daniel Zanetti Lopes
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Gilson Pereira de Oliveira
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
| | - Alvimar José da Costa
- Center of Research on Animal Health - CPPAR, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo - UNESP, Jaboticabal, SP, Brazil
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Felippelli G, Lopes WDZ, Cruz BC, Teixeira WFP, Maciel WG, Fávero FC, Buzzulini C, Sakamoto C, Soares VE, Gomes LVC, de Oliveira GP, da Costa AJ. Nematode resistance to ivermectin (630 and 700μg/kg) in cattle from the Southeast and South of Brazil. Parasitol Int 2014; 63:835-40. [PMID: 25130588 DOI: 10.1016/j.parint.2014.08.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 07/29/2014] [Accepted: 08/01/2014] [Indexed: 11/16/2022]
Abstract
Two high doses of ivermectin (630μg/kg and 700μg/kg) that are sold commercially in Brazil were evaluated in dose-and-slaughter trials with 144 naturally nematode-infected cattle from eight regions within the states of Minas Gerias, São Paulo and Rio Grande do Sul in Brazil. Treatment groups were based on fecal egg counts 1, 2, and 3days before treatment; all animals studied had a minimum egg count of at least 500 eggs per gram of feces (EPG). Post-mortem analyses were conducted on day 14. The highest levels of resistance to ivermectin were found for Haemonchus placei, Cooperia punctata and Oesophagostomum radiatum; all populations of H. placei were resistant to the 630μg/kg dose, and 67% were resistant to 700μg/kg; 86% of C. punctata were resistant to the 630μg/kg dose, and 33% were resistant to 700μg/kg. A combined analysis revealed that 57% of O. radiatum were resistant to the lower dose of ivermectin. H. placei, C. punctata and O. radiatum, in order, were the nematode populations with the highest indices of resistance, whereas Trichostrongylus axei was the most susceptible to 630 and 700μg/kg dosages of ivermectin. The results of helminthic resistance to ivermectin for different populations of H. placei and C. punctata described in the present study support previous literature data, in which a small decrease in the average parasitic burden of C. punctata and a consequent increase of H. placei were observed in cattle from the Southeast, South and Center-West regions of Brazil.
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Affiliation(s)
- Gustavo Felippelli
- 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-Brasil, Brazil
| | - Welber Daniel Zanetti Lopes
- 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-Brasil, Brazil.
| | - Breno Cayeiro Cruz
- 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-Brasil, Brazil
| | - Weslen Fabricio Pires Teixeira
- 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-Brasil, Brazil
| | - Willian Giquelin Maciel
- 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-Brasil, Brazil
| | - Flávia Carolina Fávero
- 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-Brasil, Brazil
| | - Carolina Buzzulini
- 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-Brasil, Brazil
| | - Claudio Sakamoto
- 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-Brasil, Brazil
| | - Vando Edésio Soares
- 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-Brasil, Brazil; UNICASTELO - Universidade Camilo Castelo Branco, Brazil
| | - Lucas Vinicius Costa Gomes
- 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-Brasil, Brazil
| | - Gilson Pereira de Oliveira
- 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-Brasil, Brazil
| | - Alvimar José da Costa
- 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-Brasil, Brazil
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Lopes WDZ, Cruz BC, Teixeira WFP, Felippelli G, Maciel WG, Buzzulini C, Gomes LVC, Favero F, Soares VE, Bichuette MA, de Oliveira GP, da Costa AJ. Efficacy of fipronil (1.0mg/kg) against Rhipicephalus (Boophilus) microplus strains resistant to ivermectin (0.63mg/kg). Prev Vet Med 2014; 115:88-93. [DOI: 10.1016/j.prevetmed.2014.04.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Revised: 04/06/2014] [Accepted: 04/17/2014] [Indexed: 10/25/2022]
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Cruz BC, Teixeira WFP, Maciel WG, Felippelli G, Fávero FC, Cruz AC, Buzzulini C, Soares VE, Gomes LVC, Lopes WDZ, de Oliveira GP, da Costa AJ. Effects of fluazuron (2.5 mg/kg) and a combination of fluazuron (3.0 mg/kg) + abamectin (0.5 mg/kg) on the reproductive parameters of a field population of Rhipicephalus (Boophilus) microplus on experimentally infested cattle. Res Vet Sci 2014; 97:80-4. [PMID: 24837997 DOI: 10.1016/j.rvsc.2014.04.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 04/23/2014] [Accepted: 04/29/2014] [Indexed: 11/17/2022]
Abstract
The current study assessed the deleterious effects of two formulations of fluazuron (2.5 mg/kg fluazuron and a combination of 3.0 mg/kg fluazuron + 0.5 mg/kg abamectin) on the reproductive parameters of engorged Rhipicephalus (Boophilus) microplus females that naturally detached from experimentally infested cattle in two experiments. Based on the obtained results, it can be concluded that fluazuron (2.5 mg/kg) showed deleterious effects only on the hatchability percentage in the period of 2-7 post-treatment days of this ectoparasite's engorged females. On the other hand, the fluazuron (3.0 mg/kg) + abamectin (0.5 mg/kg) combination presented harmful effects over reproductive parameters of this tick species. Further studies should be performed with a known tick population (reference susceptible strain) to determine the effect of these formulations on the reproductive parameters and to elucidate if this field population is fluazuron resistant.
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Affiliation(s)
- Breno Cayeiro Cruz
- 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, Brasil
| | - Weslen Fabricio Pires Teixeira
- 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, Brasil
| | - Willian Giquelin Maciel
- 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, Brasil
| | - Gustavo Felippelli
- 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, Brasil
| | - Flávia Carolina Fávero
- 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, Brasil
| | - André Cayeiro Cruz
- 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, Brasil
| | - Carolina Buzzulini
- 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, Brasil
| | - Vando Edésio Soares
- 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, Brasil
| | - Lucas Vinicius Costa Gomes
- 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, Brasil
| | - Welber Daniel Zanetti Lopes
- 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, Brasil.
| | - Gilson Pereira de Oliveira
- 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, Brasil
| | - Alvimar José da Costa
- 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, Brasil
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Lopes WDZ, Cruz BC, Soares VE, Nunes JLN, Teixeira WFP, Maciel WG, Buzzulini C, Pereira JCM, Felippelli G, Soccol VT, de Oliveira GP, da Costa AJ. Historic of therapeutic efficacy of albendazol sulphoxide administered in different routes, dosages and treatment schemes, against Taenia saginata cysticercus in cattle experimentally infected. Exp Parasitol 2013; 137:14-20. [PMID: 24309372 DOI: 10.1016/j.exppara.2013.11.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 09/11/2013] [Accepted: 11/26/2013] [Indexed: 11/15/2022]
Abstract
The present study aimed to notify the history of albendazole sulphoxide (ALB-SO) and albendazole (ALBZ) efficacy against Taenia saginata cysticercus (Cysticercus bovis) parasitizing experimentally infected bovines. A total of 11 efficacy trials were performed between the years of 2002 and 2010. In order to perform these trials, animals were individually inoculated with 2×10(4) eggs of T. saginata in each study's day zero (D0). For every trial, a positive control group (untreated infected animals) and a negative control group (animals that were neither infected nor treated) were used. ALB-SO or ALB were administered in the different dosages, in different days of treatments. In a last study with this formulation, this active principle was administered orally, mixed with the mineral supplement, on the 60th DPI, in a dosage of 30mg/kg. In all trials, on the 100th DPI, all animals were euthanized and submitted to the sequenced slicing of 26 anatomical segments (fragments of approximately five millimeters) for the survey of T. saginata cysticercus. With the obtained results it is possible to verify that in the first trials, conducted in 2002, ALB-SO reached, independently of dosage and treatment scheme, efficacies superior to 98% (arithmetic means). The trials conducted in 2005 (2.5mg/kg on the 30th, 60th, and 90th DPI) obtained values of efficacy all inferior to 60%. In 2008, the trials with 2.5 and 7.7mg/kg demonstrated efficacy values inferior to 40%, for both dosages and treatment schemes (30th/60th/90th DPI and 60th DPI). When this formulation was administered orally on the dosage of 30mg/kg on the 60th DPI, the efficacy against T. saginata cysticercus reached 88.28%. ALB administered orally showed efficacy values of 0.0%, 29.88% and 28.64% in the dosages of 5, 10 and 15mg/kg, respectively, using the treatment schemes described above for each dosage. Based on the results of these trials, conducted in an eight year period (2002-2010) using the sequenced slicing method for evaluating the efficacy of the aforementioned formulations against T. saginata cysticercus, it is possible to observe that, amongst the few molecules used in the chemotherapic treatment against T. saginata larvae, ALB-SO, administered in varied routes, dosages and treatment schemes, the studies conducted in 2008, 2009, and 2010, have a low therapeutic efficacy against C. bovis in Brazil, while ALBZ had insignificant efficacy values against T. saginata larvae parasitizing experimentally infected bovines. However, future studies using molecular biology will be necessary to assess whether the difference on the efficacy of the ALB-SO can be related to strain or another specific factor.
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Affiliation(s)
- Welber Daniel Zanetti Lopes
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil.
| | - Breno Cayeiro Cruz
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil
| | - Vando Edésio Soares
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil; Universidade Camilo Castelo Branco - UNICASTELO. Av. Hilário da Silva Passos, 950. Parqui universitário - Descalvado-SP, CEP13690-970, Brazil
| | - Jorge Luis N Nunes
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil; Centro Universitário Barão de Mauá. Rua Laguna, 241 - Jardim Paulista, Ribeirão Preto-SP, CEP 1409-180, Brazil
| | - Weslen Fabricio Pires Teixeira
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil
| | - Willian Giquelin Maciel
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil
| | - Carolina Buzzulini
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil
| | - João Carlos Melo Pereira
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil
| | - Gustavo Felippelli
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil
| | - Vanette Thomaz Soccol
- Universidade Federal do Paraná. Rua Quinze de Novembro, Curitiba-PR, CEP 80060-000, Brazil
| | - Gilson Pereira de Oliveira
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil
| | - Alvimar José da Costa
- Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de Acesso Prof. Paulo Donatto Castellani, s/n CEP 14884-900, Jaboticabal, São Paulo, Brazil
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Sousa KCMD, André MR, Herrera HM, Andrade GBD, Jusi MMG, Santos LLD, Barreto WTG, Machado RZ, Oliveira GPD. Molecular and serological detection of tick-borne pathogens in dogs from an area endemic for Leishmania infantumin Mato Grosso do Sul, Brazil. Rev Bras Parasitol Vet 2013; 22:525-31. [DOI: 10.1590/s1984-29612013000400012] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 10/28/2013] [Indexed: 11/22/2022]
Abstract
Tick-borne pathogens affect a wide range of vertebrate hosts. To identify tick-borne pathogens among dogs from Campo Grande, MS, Brazil testing seropositive for Leishmania infantum (syn. L. chagasi), a serological and molecular study was conducted to detectEhrlichia canis, Anaplasma platys and Babesia vogeli in 60 serum and spleen samples. A confirmatory diagnosis ofL. infantum based on serological and molecular assays was also performed, as was sequence alignment and phylogenetic analysis to assess the identity of the parasite species infecting these animals. IgG antibodies toEhrlichia spp., B. vogeli and L. infantum were found, respectively, in 39 (65%), 49 (81.6%) and 60 (100%) of the sampled dogs. Twenty-seven (45%), fifty-four (90%), fifty-three (88.3%), two (3.3%) and one (1.6%) dog were positive, respectively, forE. canis, Leishmania spp., Leishmania donovani complex, Babesia sp. and Anaplasma sp. in PCR assays. After sequencing, the amplicons showed 99% of identity with E. canis, B. vogeli, A. platys andLeishmania chagasi isolates. The findings of this study indicate that L. infantum-seropositive dogs from Campo Grande are exposed to multiple tick-borne pathogens, which should therefore be included in the differential diagnosis of dogs with clinical suspicion of leishmaniasis.
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Domingues LF, Giglioti R, Feitosa KA, Fantatto RR, Rabelo MD, de Sena Oliveira MC, Bechara GH, de Oliveira GP, Barioni Junior W, de Souza Chagas AC. In vitro and in vivo evaluation of the activity of pineapple (Ananas comosus) on Haemonchus contortus in Santa Inês sheep. Vet Parasitol 2013; 197:263-70. [DOI: 10.1016/j.vetpar.2013.04.031] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 04/15/2013] [Accepted: 04/21/2013] [Indexed: 11/25/2022]
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Lopes WDZ, Teixeira WFP, de Matos LVS, Felippelli G, Cruz BC, Maciel WG, Buzzulini C, Fávero FC, Soares VE, Oliveira GPD, da Costa AJ. Effects of macrocyclic lactones on the reproductive parameters of engorged Rhipicephalus (Boophilus) microplus females detached from experimentally infested cattle. Exp Parasitol 2013; 135:72-8. [DOI: 10.1016/j.exppara.2013.06.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 05/08/2013] [Accepted: 06/09/2013] [Indexed: 11/25/2022]
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Domingues LF, Giglioti R, Feitosa KA, Fantatto RR, Rabelo MD, Oliveira MCDS, Oliveira GPD, Bechara GH, Chagas ACDS. In vitro activity of pineapple extracts (Ananas comosus, Bromeliaceae) on Rhipicephalus (Boophilus) microplus (Acari: Ixodidae). Exp Parasitol 2013; 134:400-4. [DOI: 10.1016/j.exppara.2013.03.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 02/21/2013] [Accepted: 03/17/2013] [Indexed: 10/27/2022]
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Quadros DGD, Silva Sobrinho AGD, Rodrigues LRDA, Oliveira GPD, Xavier CP, Andrade AP. EFEITO DE TRÊS ESPÉCIES DE GRAMÍNEAS FORRAGEIRAS SOBRE A ESTRUTURA DA PASTAGEM E DISTRIBUIÇÃO VERTICAL DE LARVAS INFECTANTES DE NEMATÓDEOS GASTRINTESTINAIS DE OVINOS. Ci Anim Bras 2012. [DOI: 10.5216/cab.v13i2.4973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Quadros DGD, Sobrinho AGDS, Rodrigues LRDA, Oliveira GPD, Xavier CP, Andrade AP, Cunha MLDCSE, Feitosa JV. VERMINOSE EM CAPRINOS E OVINOS MANTIDOS EM PASTAGENS DE Panicum maximum Jacq. NO PERÍODO CHUVOSO DO ANO. Ci Anim Bras 2010. [DOI: 10.5216/cab.v11i4.507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Santana LF, Costa AJD, Pieroni J, Lopes WDZ, Santos RS, Oliveira GPD, Mendonça RPD, Sakamoto CAM. Detection of Toxoplasma gondii in the reproductive system of male goats. Rev Bras Parasitol Vet 2010; 19:179-82. [DOI: 10.1590/s1984-29612010000300010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Accepted: 07/12/2010] [Indexed: 11/21/2022]
Abstract
Male goats of mating age serologically negative for Toxoplasma gondii were divided into three groups: GI - controls (placebo) (n = 2); GII - infected with 1 × 10(6) tachyzoites (RH strains) (n = 2); and GIII - infected with 2 × 10(5) oocysts (P strains) (n = 2). Clinical, hematology, parasite and serology tests and studies of parasites in the semen through bioassay and polymerase chain reaction (PCR), and in reproductive organs (bioassay) were performed to assess toxoplasma infection. Serological titers peaked at 4096 in two animal groups infected with the protozoan. The bioassays allowed an early detection of protozoa in semen samples of tachyzoite-inoculated animals. T. gondii DNA was identified through PCR in the semen in five (Days 5, 7, 28, 49, and 70) and two (both at day 56) different days post-inoculation in GII and GIII animals, respectively. It was also possible to detect T. gondii DNA in reproductive organs (prostate pool, testicles, seminal vesicle and epididymis) of goats inoculated with either tachyzoites or oocysts. The present study suggests the possibility of venereal transmission of T. gondii among goats and it should be further assessed.
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Oliveira GPD. Epidemiologia de Dermatobia hominis (L. Jr. 1781) (Diptera: Cuterebridae) em bovinos na região de São Carlos, Estado de São Paulo, Brasil. Braz J Vet Res Anim Sci 1991. [DOI: 10.11606/issn.1678-4456.bjvras.1991.51936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Nódulos de berne (Dermatobia hominis) foram contados em bovinos da raça Canchim, machos e fêmeas, na faixa etária de 24-36 meses, no período de janeiro de 1982 a dezembro de 1983. A contagem era feita do lado esquerdo do animal a cada 14 dias, em lotes de 15 animais, com o objetivo de observar a epidemiologia do berne na região de São Carlos. As maiores infestações foram observadas nos meses de fevereiro, setembro, outubro e dezembro, o que representa uma frequência de 14,5%, 17,5%, 17,5% e 9,7%, respectivamente. As menores infestações foram verificadas nos meses de julho e agosto com 1,2% e 0,9%, respectivamente. Os meses de janeiro, março, abril, maio, junho e novembro apresentaram intensidade de infestação intermediária, que correspondem a 5,8%, 4,5%, 7,5%, 7,4% e 7,7%, respectivamente. As frequências de nódulos de berne mais elevadas foram observadas no período referente aos meses mais quentes e úmidos, enquanto as menores nos meses mais frios e secos.
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