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Matos CA, Silva JBD, Gonçalves LR, Mendes NS, Alvarez DO, André MR, Machado RZ. Genetic diversity of Babesia bovis studied longitudinally under natural transmission conditions in calves in the state of Rio de Janeiro, Brazil. ACTA ACUST UNITED AC 2020; 29:e021220. [PMID: 33237196 DOI: 10.1590/s1984-29612020089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 09/08/2020] [Indexed: 11/22/2022]
Abstract
Serum and DNA samples from 15 naturally infected calves in Seropédica, Brazil, were obtained quarterly from birth to 12 months of age, in order to longitudinally evaluate their humoral immune response against Babesia bovis and the merozoite surface antigen diversity of B. bovis. Anti-B. bovis IgG antibodies were detected by an indirect fluorescent antibody test (IFAT) and enzyme-linked immunosorbent assay (ELISA). Using DNA amplification, sequencing and phylogenetic analysis, the genetic diversity of B. bovis was assessed based on the genes that encode merozoite surface antigens (MSA-1, MSA-2b and MSA-2c). The serological results demonstrated that up to six months of age, all the calves developed active immunity against B. bovis. Among the 75 DNA samples evaluated, 0, 3 and 5 sequences of the msa-1, msa-2b and msa-2c genes were obtained, respectively. The present study demonstrated that the msa-2b and msa-2c gene sequences amplified from blood DNA of B. bovis-positive calves were genetically diversified. These data emphasize the importance of conducting deeper studies on the genetic diversity of B. bovis in Brazil, in order to design diagnostic antigens and vaccines in the future.
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Affiliation(s)
- Carlos António Matos
- Departamento de Patologia, Reprodução e Saúde Única, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (UNESP), Jaboticabal, SP, Brasil.,Direcção de Ciências Animais, Maputo, Moçambique
| | - Jenevaldo Barbosa da Silva
- Departamento de Patologia, Reprodução e Saúde Única, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (UNESP), Jaboticabal, SP, Brasil
| | - Luiz Ricardo Gonçalves
- Departamento de Patologia, Reprodução e Saúde Única, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (UNESP), Jaboticabal, SP, Brasil
| | - Natalia Serra Mendes
- Departamento de Patologia, Reprodução e Saúde Única, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (UNESP), Jaboticabal, SP, Brasil
| | | | - Marcos Rogério André
- Departamento de Patologia, Reprodução e Saúde Única, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (UNESP), Jaboticabal, SP, Brasil
| | - Rosangela Zacarias Machado
- Departamento de Patologia, Reprodução e Saúde Única, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (UNESP), Jaboticabal, SP, Brasil
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Ramos IADS, Mello VVCD, Mendes NS, Zanatto DCDS, Campos JBV, Alves JVA, Macedo GCD, Herrera HM, Labruna MB, Pereira GT, Machado RZ, André MR. Serological occurrence for tick-borne agents in beef cattle in the Brazilian Pantanal. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2020; 29:e014919. [PMID: 32267389 DOI: 10.1590/s1984-29612020007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 01/27/2020] [Indexed: 11/22/2022]
Abstract
This study investigated the seropositivity for five different tick-borne agents, namely Anaplasma marginale, Babesia bovis, Babesia bigemina, Coxiella burnetii, Anaplasma phagocytophilum, and Trypanosoma vivax in beef cattle in the Brazilian Pantanal. The serum samples collected from animals (200 cows; 200 calves) were used in indirect enzyme-linked immunosorbent assays (iELISA) to detect IgG antibodies against A. marginale, B. bovis, B. bigemina, and T. vivax, and Indirect Fluorescent Antibody Test (IFAT) for detecting IgG antibodies against C. burnetii and A. phagocytophilum. No correlation was observed between seropositivity for C. burnetii and A. phagocytophilum with other agents whereas moderate correlation was observed for A. marginalexB. bigemina x B. bovis. Cows were more seropositive for T. vivax whereas calves were more seropositive for B. bovis and B. bigemina. The highest number of seropositive animals by a single agent was observed for T. vivax (15.2%). Co-seropositivity for T. vivax + A. marginale was higher in cows (25.5%) and for T. vivax + B. bovis + B. bigemina + A. marginale was higher in calves (57.5%). The high seropositivity correlation for A. marginale x B. bovis x B. bigemina is probably due to the presence of the tick biological vector, Rhipicephalus microplus, in the studied farms. Common transmission pathways, mediated by hematophagous dipterans and fomites, may explain the high co-seropositivity of cows for A. marginale and T. vivax. Low seropositivity to C. burnetii is probably due to the type of breeding system employed (extensive). Seropositivity for A. phagocytophilum in only one animal suggests the occurrence of a cross-serological reaction with another agent of the genus Anaplasma.
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Affiliation(s)
- Inalda Angélica de Souza Ramos
- Departamento de Patologia Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Jaboticabal, SP, Brasil
| | - Victória Valente Califre de Mello
- Departamento de Patologia Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Jaboticabal, SP, Brasil
| | - Natalia Serra Mendes
- Departamento de Patologia Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Jaboticabal, SP, Brasil
| | - Diego Carlos de Souza Zanatto
- Departamento de Patologia Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Jaboticabal, SP, Brasil
| | - João Bosco Vilela Campos
- Departamento de Parasitologia Veterinária, Universidade Católica Dom Bosco, Campo Grande, MS, Brasil
| | - João Vitor Almeida Alves
- Departamento de Parasitologia Veterinária, Universidade Católica Dom Bosco, Campo Grande, MS, Brasil
| | | | - Heitor Miraglia Herrera
- Departamento de Parasitologia Veterinária, Universidade Católica Dom Bosco, Campo Grande, MS, Brasil
| | - Marcelo Bahia Labruna
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Gener Tadeu Pereira
- Departamento de Ciências Exatas, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Jaboticabal, SP, Brasil
| | - Rosangela Zacarias Machado
- Departamento de Patologia Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Jaboticabal, SP, Brasil
| | - Marcos Rogério André
- Departamento de Patologia Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Jaboticabal, SP, Brasil
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Mendes NS, de Souza Ramos IA, Herrera HM, Campos JBV, de Almeida Alves JV, de Macedo GC, Machado RZ, André MR. Genetic diversity of Babesia bovis in beef cattle in a large wetland in Brazil. Parasitol Res 2019; 118:2027-2040. [PMID: 31079252 DOI: 10.1007/s00436-019-06337-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Accepted: 04/24/2019] [Indexed: 10/26/2022]
Abstract
Babesia bovis is the etiological agent of bovine babesiosis, a disease transmitted by Rhipicephalus microplus, which affects cattle herds in tropical and subtropical regions of the world, causing significant economic losses due to decreasing meat and milk yield. This study used molecular techniques to determine the occurrence and genetic diversity of B. bovis, based on the genes encoding the spherical body protein (sbp-2) and the merozoite surface antigens (MSAs) genes, in a herd of 400 Nellore (Bos indicus) sampled from beef cattle farms in the Pantanal region, state of Mato Grosso do Sul, Midwestern Brazil. The results of the nested PCR assays based on the sbp-2 gene indicated that 18 (4.5%) calves were positive for B. bovis; out of them, while 77.7% (14/18) were positive for the B. bovis msa-2b fragment, 66.6% (12/18) were positive for the msa-2c fragment. The phylogenetic analysis based on the maximum likelihood method using 14 sequences from msa-2b clones and 13 sequences from msa-2c clones indicated that the sequences detected in this study are clearly distributed in different cladograms. These findings corroborated the diversity analysis of the same sequences, which revealed the presence of 14 and 11 haplotypes of the msa-2b and msa-2c genes, respectively. Furthermore, the entropy analyses of amino acid sequences revealed 78 and 44 high entropy peaks with values ranging from 0.25 to 1.53 and from 0.27 to 1.09 for MSA-2B and MSA-2C, respectively. Therefore, the results indicate a low molecular occurrence of B. bovis in beef cattle sampled in the Brazilian Pantanal. Despite this, a high degree of genetic diversity was found in the analyzed B. bovis population, with possibly different haplotypes coexisting in the same animal and/or in the same studied herd.
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Affiliation(s)
- Natalia Serra Mendes
- Agricultural and Livestock Microbiology Graduation Program, School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, Brazil.,Laboratory of Immunoparasitology, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias/Universidade Estadual Paulista (FCAV/UNESP), Via de Acesso Prof. Paulo Donato Castellane, s/n, Zona Rural, Jaboticabal, São Paulo, 14884-900, Brazil
| | - Inalda Angélica de Souza Ramos
- Laboratory of Immunoparasitology, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias/Universidade Estadual Paulista (FCAV/UNESP), Via de Acesso Prof. Paulo Donato Castellane, s/n, Zona Rural, Jaboticabal, São Paulo, 14884-900, Brazil
| | | | | | | | | | - Rosangela Zacarias Machado
- Laboratory of Immunoparasitology, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias/Universidade Estadual Paulista (FCAV/UNESP), Via de Acesso Prof. Paulo Donato Castellane, s/n, Zona Rural, Jaboticabal, São Paulo, 14884-900, Brazil
| | - Marcos Rogério André
- Laboratory of Immunoparasitology, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias/Universidade Estadual Paulista (FCAV/UNESP), Via de Acesso Prof. Paulo Donato Castellane, s/n, Zona Rural, Jaboticabal, São Paulo, 14884-900, Brazil.
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Obregón D, Cabezas-Cruz A, Armas Y, Silva JB, Fonseca AH, André MR, Alfonso P, Oliveira MCS, Machado RZ, Corona-González B. High co-infection rates of Babesia bovis, Babesia bigemina, and Anaplasma marginale in water buffalo in Western Cuba. Parasitol Res 2019; 118:955-967. [PMID: 30693380 DOI: 10.1007/s00436-018-06194-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 12/28/2018] [Indexed: 01/19/2023]
Abstract
Water buffalo is important livestock in several countries in the Latin American and Caribbean regions. This buffalo species can be infected by tick-borne hemoparasites and remains a carrier of these pathogens which represent a risk of infection for more susceptible species like cattle. Therefore, studies on the epidemiology of tick-borne hemoparasites in buffaloes are required. In this study, the prevalence of Babesia bovis, Babesia bigemina, and Anaplasma marginale were determined in water buffalo herds of western Cuba. To this aim, a cross-sectional study covering farms with large buffalo populations in the region was performed. Eight buffalo herds were randomly selected, and blood samples were collected from 328 animals, including 63 calves (3-14 months), 75 young animals (3-5 years), and 190 adult animals (> 5 years). Species-specific nested PCR and indirect ELISA assays were used to determine the molecular and serological prevalences of each hemoparasite, respectively. The molecular and serological prevalence was greater than 50% for the three hemoparasites. Differences were found in infection prevalence among buffalo herds, suggesting that local epidemiological factors may influence infection risk. Animals of all age groups were infected, with a higher molecular prevalence of B. bigemina and A. marginale in young buffalo and calves, respectively, while a stepwise increase in seroprevalence of B. bovis and B. bigemina from calves to adult buffaloes was found. The co-infection by the three pathogens was found in 12% of animals, and when analyzed by pair, the co-infections of B. bovis and B. bigemina, B. bigemina and A. marginale, and B. bovis and A. marginale were found in 20%, 24%, and 26%, respectively, underlying the positive interaction between these pathogens infecting buffaloes. These results provide evidence that tick-borne pathogen infections can be widespread among water buffalo populations in tropical livestock ecosystems. Further studies should evaluate whether these pathogens affect the health status and productive performance of water buffalo and infection risk of these pathogens in cattle cohabiting with buffalo.
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Affiliation(s)
- Dasiel Obregón
- Universidad Agraria de La Habana, Apartado Postal 18-19, Carretera Tapaste y Autopista Nacional, CP 32700, San José de Las Lajas, Mayabeque, Cuba. .,Centro Nacional de Sanidad Agropecuaria, Apartado Postal 10, Carretera de Jamaica y Autopista Nacional, San José de Las Lajas, CP 32700, Mayabeque, Cuba.
| | - Alejandro Cabezas-Cruz
- UMR BIPAR, INRA, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, 94700, Maisons-Alfort, France
| | - Yasmani Armas
- Universidad Agraria de La Habana, Apartado Postal 18-19, Carretera Tapaste y Autopista Nacional, CP 32700, San José de Las Lajas, Mayabeque, Cuba
| | - Jenevaldo B Silva
- Universidade Federal Rural do Rio de Janeiro, Rodovia BR 465, Km 07, s/n - Zona Rural, Seropédica - RJ, CEP 23890-000, Brazil
| | - Adivaldo H Fonseca
- Universidade Federal Rural do Rio de Janeiro, Rodovia BR 465, Km 07, s/n - Zona Rural, Seropédica - RJ, CEP 23890-000, Brazil
| | - Marcos R André
- Universidade Estadual Paulista-Campus de Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, S/N - Vila Industrial, Jaboticabal, São Paulo, CEP 14884-900, Brazil
| | - Pastor Alfonso
- Centro Nacional de Sanidad Agropecuaria, Apartado Postal 10, Carretera de Jamaica y Autopista Nacional, San José de Las Lajas, CP 32700, Mayabeque, Cuba
| | - Márcia C S Oliveira
- Embrapa Pecuária Sudeste, Rodovia Washington Luiz, km 234, São Carlos, São Paulo, CEP 13560-970, Brazil
| | - Rosangela Z Machado
- Universidade Estadual Paulista-Campus de Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, S/N - Vila Industrial, Jaboticabal, São Paulo, CEP 14884-900, Brazil
| | - Belkis Corona-González
- Centro Nacional de Sanidad Agropecuaria, Apartado Postal 10, Carretera de Jamaica y Autopista Nacional, San José de Las Lajas, CP 32700, Mayabeque, Cuba
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Matos CA, Gonçalves LR, Alvarez DO, Freschi CR, Silva JBD, Val-Moraes SP, Mendes NS, André MR, Machado RZ. Longitudinal evaluation of humoral immune response and merozoite surface antigen diversity in calves naturally infected with Babesia bovis, in São Paulo, Brazil. ACTA ACUST UNITED AC 2018; 26:479-490. [PMID: 29211135 DOI: 10.1590/s1984-29612017069] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 11/07/2017] [Indexed: 11/21/2022]
Abstract
Babesiosis is an economically important infectious disease affecting cattle worldwide. In order to longitudinally evaluate the humoral immune response against Babesia bovis and the merozoite surface antigen diversity of B. bovis among naturally infected calves in Taiaçu, Brazil, serum and DNA samples from 15 calves were obtained quarterly, from their birth to 12 months of age. Anti-B. bovis IgG antibodies were detected by means of the indirect fluorescent antibody test (IFAT) and enzyme-linked immunosorbent assay (ELISA). The polymerase chain reaction (PCR) was used to investigate the genetic diversity of B. bovis, based on the genes that encode merozoite surface antigens (MSA-1, MSA-2b and MSA-2c). The serological results demonstrated that up to six months of age, all the calves developed active immunity against B. bovis. Among the 75 DNA samples evaluated, 2, 4 and 5 sequences of the genes msa-1, msa-2b and msa-2c were obtained. The present study demonstrated that the msa-1 and msa-2b genes sequences amplified from blood DNA of calves positive to B. bovis from Taiaçu were genetically distinct, and that msa-2c was conserved. All animals were serologically positive to ELISA and IFAT, which used full repertoire of parasite antigens in despite of the genetic diversity of MSAs.
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Affiliation(s)
- Carlos António Matos
- Laboratório de Imunoparasitologia, Departamento de Patologia Veterinária, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil.,Direcção de Ciências Animais, Maputo, Moçambique
| | - Luiz Ricardo Gonçalves
- Laboratório de Imunoparasitologia, Departamento de Patologia Veterinária, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil
| | | | - Carla Roberta Freschi
- Laboratório de Imunoparasitologia, Departamento de Patologia Veterinária, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil
| | - Jenevaldo Barbosa da Silva
- Laboratório de Imunoparasitologia, Departamento de Patologia Veterinária, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil
| | - Silvana Pompeia Val-Moraes
- Laboratório de Imunoparasitologia, Departamento de Patologia Veterinária, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil
| | - Natalia Serra Mendes
- Laboratório de Imunoparasitologia, Departamento de Patologia Veterinária, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil
| | - Marcos Rogério André
- Laboratório de Imunoparasitologia, Departamento de Patologia Veterinária, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil
| | - Rosangela Zacarias Machado
- Laboratório de Imunoparasitologia, Departamento de Patologia Veterinária, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil
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Giglioti R, Oliveira HN, Ibelli AMG, Bilhassi TB, Néo TA, Santana CH, Rabelo MD, Machado RZ, de Souza Chagas AC, de Sena Oliveira MC. Neither quantification by qPCR nor quantitative Elisa can be used to discriminate Angus cattle for resistance/susceptibility to Babesia bovis. Ticks Tick Borne Dis 2017; 8:335-340. [DOI: 10.1016/j.ttbdis.2016.11.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/31/2016] [Accepted: 11/19/2016] [Indexed: 10/20/2022]
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Santos GB, Gomes IM, Silveira JA, Pires LC, Azevedo SS, Antonelli AC, Ribeiro MF, Horta MC. Tristeza Parasitária em bovinos do semiárido pernambucano. PESQUISA VETERINARIA BRASILEIRA 2017. [DOI: 10.1590/s0100-736x2017000100001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
RESUMO: Este estudo objetivou determinar a soroprevalência da Babesiose e Anaplasmose em bovinos dos municípios de Ouricuri e Petrolina, estado de Pernambuco, Brasil; e definir os possíveis fatores de risco para a ocorrência dessas doenças. Amostras de sangue foram coletadas para realização de teste sorológico por Imunofluorescência Indireta (RIFI). Questionários epidemiológicos sanitários foram aplicados aos produtores com o objetivo de identificar possíveis fatores de risco. Carrapatos foram coletados, identificados e testados por Reação em Cadeia da Polimerase (PCR) para o diagnóstico da infecção por Anaplasma marginale, Babesia bigemina e Babaesia bovis. O estudo foi conduzido com 861 bovinos, sendo 468 de Petrolina e 393 de Ouricuri. A soroprevalência de A. marginale, B. bigemina e B. bovis em Petrolina foi de 35,0% (164/468), 35,9% (168/468) e 32,3% (151/468), respectivamente; e em Ouricuri foi de 45,5% (179/393), 38,6% (152/393) e 54,9% (216/393), respectivamente. A co-infecção por Anaplasma spp. e Babesia spp. foi observada em 31,6% e 32,1% de amostras de Petrolina e Ouricuri, respectivamente. A detecção de DNA de Babesia spp. por PCR foi possível em 5,8% (8/137) carrapatos, dos quais em 62,5 % (5/8) foi detectada posteriormente infecção por B. bovis, e em 23,3% (32/137) por A. marginale. A presença de carrapatos, o uso de acaricidas, idade, raça, e o município de residência dos animais foram identificados como fatores de risco para TPB pela análise univariável e multivariável. Este estudo permitiu caracterizar os municípios estudados como de instabilidade enzoótica para esses hemoparasitos, e consequentemente, alertar para adoção de medidas adequadas de controle e realização de novos estudos.
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Souza FDA, Braga JF, Pires LV, Carvalho CJD, Costa ÉA, Ribeiro MF, Santos RL, Silva SM. Babesiosis and anaplasmosis in dairy cattle in Northeastern Brazil. PESQUISA VETERINARIA BRASILEIRA 2013. [DOI: 10.1590/s0100-736x2013000900002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The goal of this study was to characterize the epidemiological situation and the factors involved in the prevalence of babesiosis and anaplasmosis in cattle in the dairy basin of Parnaíba, Piauí, Brazil. The study was conducted in 22 farms, and collected blood samples from 202 cattle to study serological, molecular and determination of the packed cell volume (PCV). On the farms were applied surveys involving epidemiological aspects. Seroprevalence rates were: Babesia bigemina 52.5%, B. bovis 68.8%, and Anaplasma marginale 89.1%. Of the samples analyzed, 73.3% were reactive for Babesia spp. and A. marginale, showing co-infection. In PCR, B. bigemina and B. bovis were positive in 52.0% and 33.2% respectively, and A. marginale in 76.2%. Of these, 51.5% amplified DNA of Babesia spp. and A. marginale. The semi-intensive management predominated in 68.0% of the farms studied. The clinical history of babesiosis and anaplasmosis, was reported from 73% of the farms. There was no significant difference (p>0.05) between age groups and for the PCV of positive compared with negative animals. The study indicates that in this region is enzootic instability for babesiosis and enzootic stability for anaplasmosis, reinforcing the fact that in Brazil there are areas of enzootic instability, even in tropical regions of the country. The PCR technique was a valuable tool for the diagnosis of these diseases and may be used to characterize a geographic region.
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Brito LG, Rocha RB, Barbieri FDS, Ribeiro ES, Vendrami FB, Souza GC, Giglioti R, Regitano LC, Falcoski TO, Tizioto PC, Oliveira MC. Babesia bovis infection in cattle in the southwestern Brazilian Amazon. Ticks Tick Borne Dis 2013; 4:78-82. [DOI: 10.1016/j.ttbdis.2012.08.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 08/03/2012] [Accepted: 08/06/2012] [Indexed: 10/27/2022]
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Tembue AAM, da Silva JB, da Silva FJM, Pires MS, Baldani CD, Soares CO, Massard CL, da Fonseca AH. Seroprevalence of IgG antibodies against Anaplasma marginale in cattle from south Mozambique. ACTA ACUST UNITED AC 2012; 20:318-24. [PMID: 22166387 DOI: 10.1590/s1984-29612011000400011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Accepted: 07/13/2011] [Indexed: 11/22/2022]
Abstract
The current study aimed to investigate the seroprevalence of IgG antibodies to Anaplasma marginale in cattle from Maputo, Gaza and Inhambane provinces, south Mozambique. A total of 809 serum samples from cattle were obtained and tested by indirect enzyme-linked immunosorbent assay (i-ELISA). The chi-square test at 5% significance was used to assess the association between seroprevalence and the variables gender, age and geographic origin of animals. The overall seropositivity was 76.5% (n = 619) and anti-A. marginale antibodies were detected in 89.1% (n = 156), 68.4% (n = 308) and 84.2% (n = 155) of the animals in the provinces of Maputo, Gaza and Inhambane, respectively. A significant association (p < 0.05) was found with the geographic origin of the animals, while sex had no significant relationship. The frequencies of seropositive in the age groups were 63.2% (n = 72), 80.0% (n = 92), 83.1% (n = 98) and 77.3% (n = 357) for animals <12; >12 and ≤24; >24 and ≤36; >36 months, respectively. These results indicate that in southern Mozambique there are areas of enzootic stability to A. marginale. Thus, epidemiological monitoring is required to monitor the immune status of animals in the region.
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Affiliation(s)
- António Amélia Mucalane Tembue
- Curso de Pós-Graduação em Ciências Veterinárias, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
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Tembue AA, Silva FJ, Silva JB, Santos TM, Santos HA, Soares CO, Fonseca AH. Risk factors associated with the frequency of antibodies against Babesia bovis and Babesia bigemina in cattle in southern Mozambique. PESQUISA VETERINARIA BRASILEIRA 2011. [DOI: 10.1590/s0100-736x2011000800005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The study aimed to evaluate the risk factors associated with the frequency of IgG antibodies against Babesia bovis and B. bigemina in cattle in southern Mozambique. Eight hundred and nine serum samples were collected from cattle in three provinces namely Maputo, Gaza and Inhambane, and tested by indirect enzyme-linked immunosorbent assay (i-ELISA) to assess the humoral immune response towards B. bovis and B. bigemina. The chi-square test at 5% significance was used to determine whether there was an association between gender, age and geographic origin of seropositive animals. The overall prevalence was 78.8% (548/695) for B. bovis and 76.0% (528/695) for B. bigemina. The origin of the animals showed a significant association (p<0.05) with seropositivity to both agents, while gender and age was not associated (p>0.05). Maputo province had the highest rate of positive animals, with 93.7% (118/126) for B. bovis and 97.6% (123/126) for B. bigemina. In Gaza province 77.3% (321/415) of the animals were positive for B. bovis and 67.5% (280/415) for B. bigemina, while in the province of Inhambane the levels of seropositivity were 70.8% (109/154) and 81.2% (125/154) for B. bovis and B. bigemina respectively. In the present study, the frequency of cattle positive for B. bovis and B. bigemina was shown to increase among older age groups, suggesting that infection and re-infection persisted even after the primary infection. Thus, this region is considered to be in a state of enzootic stability with regards to B. bovis and B. bigemina.
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