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Giglioti R, Filho AEV, Domingos AG, da Silva SS, Cunha RC, Ibelli AMG, Okino CH, de Sena Oliveira MC. Detection and quantification of Babesia bovis and Babesia bigemina using different target genes. Res Vet Sci 2024; 168:105122. [PMID: 38194893 DOI: 10.1016/j.rvsc.2023.105122] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 08/09/2023] [Revised: 12/08/2023] [Accepted: 12/19/2023] [Indexed: 01/11/2024]
Abstract
Molecular assays have been widely used for the detection and quantification of bovine babesiosis due to their high sensitivity and specificity. However, variations in the sensitivity of pathogen detection may occur depending on the selected target gene. Thus, this study aimed to compare the detection sensitivity (DS) of Babesia bovis and B. bigemina infection levels in artificially and naturally infected cattle using quantitative PCR (qPCR) and six target genes. For B. bovis, the merozoite surface antigen genes 2b and 2c (msa-2b and msa-2c), and the mitochondrial cytochrome b gene (cybmt) were used. For B. bigemina, the genes encoding the proteins associated with rhoptry 1c (rap-1c), rap-1a, and cybmt were used. Six bovines, free of babesiosis, were artificially infected with 1 × 10-8 red blood cells infected (iRBC) with B. bovis (n = 3) or 1 × 10-6B. bigemina iRBC (n = 3). The animals were evaluated daily until parasitemia was confirmed (≥ 2.0%). The quantity of iRBC present in each animal was determined by examining blood smears. Blood samples were then subjected to DNA extraction, serial dilution, and qPCR analysis to determine the DS of each target gene. In addition, 30 calves naturally infected by Babesia spp. were also evaluated using the same six target genes. Regarding the artificial infection, B. bovis cybmt showed 25-fold higher sensitivity than the msa-2b and msa-2c genes, while the B. bigemina cybmt exhibited 5-fold and 25-fold higher sensitivity than the rap-1a and rap-1c genes, respectively. The rap-1a gene was found to be 5 times more sensitive than the rap-1c gene, while the B. bovis msa-2b and msa-2c genes exhibited similar DS. The positive frequencies of naturally infected calves for the target cybmt, msa-2b, and msa-2c genes (B. bovis) were: 100%, 33.3% and 50%, while cybmt, rap-1a, and rap-1c genes (B. bigemina) were 90%, 83.3%, and 63.3%, respectively. This study may contribute to the selection of suitable genes for molecular monitoring of bovine babesiosis. Mitochondrial genes could be considered as an alternative to improve the sensitivity of B. bovis and B. bigemina detection using qPCR.
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Affiliation(s)
- Rodrigo Giglioti
- Instituto de Zootecnia, Rua Heitor Penteado, n. 56, Nova Odessa, São Paulo 13380-011, Brazil.
| | | | | | - Sérgio Silva da Silva
- C.R.O. Animal Science, Estrada Colônia São Domingos, Colônia, Turuçú, Rio Grande do Sul, Brazil
| | - Rodrigo Casquero Cunha
- Laboratório de Biologia Molecular Veterinária, Faculdade de Veterinária, Universidade Federal de Pelotas, Capão do Leão, Rio Grande do Sul, Brazil
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de Freitas BR, da Rosa G, Roman IJ, Gressler LT, Cargnelutti JF, Vogel FSF, Cunha RC. Molecular detection of DNA from Trypanosoma spp. and Leishmania spp. in wild boar (Sus scrofa) tissues. Vet Parasitol Reg Stud Reports 2024; 47:100970. [PMID: 38199676 DOI: 10.1016/j.vprsr.2023.100970] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 09/19/2023] [Revised: 11/22/2023] [Accepted: 12/05/2023] [Indexed: 01/12/2024]
Abstract
Due to the proximity of humans to the countryside and the progressive increase in populations of invasive species, such as wild boars (Sus scrofa), the risk of disease spread is also exacerbated, some of which are zoonoses caused by protozoa. In the present study, 75 tissue/organ samples from 25 wild boars obtained from authorized hunting in the northern region of Rio Grande do Sul were evaluated to investigate the presence of Trypanosoma spp. using conventional PCR with specific primers and amplification of the ITS1 region for Leishmania spp. detection and species differentiation, multiplex PCR with kDNA minicircle amplification was performed. Trypanosoma spp. DNA was detected in 11 out of 25 hearts, representing 44% of the culled animals. Regarding the detection of Leishmania DNA, L. infantum was detected in one spleen sample, accounting for 4%, and L. amazonensis in one liver sample from the same animal, also representing 4% (1/25) of the samples. It is important to note that this wild boar, with detection for both L. amazonensis and L. infantum, also had Trypanosoma spp. DNA detected in a heart sample, indicating the potential of this species to have multiple infections with these agents. Furthermore, this is the first reported case of multiple infection in a wild boar with these agents. Therefore, the results obtained reinforce the risk posed by invasive species, especially wild boars, as potential sources of infectious agent dissemination and their role as possible reservoirs for numerous diseases.
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Affiliation(s)
- Bibiana Rodrigues de Freitas
- Laboratory of Veterinary Molecular Biology, Department of Preventive Veterinary Medicine, Federal University of Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil.
| | - Gilneia da Rosa
- Posgraduate Program in Veterinary Medicine, Department of Preventive Veterinary Medicine, Parasitic Diseases Laboratory, University Federal of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
| | - Isac Junior Roman
- Posgraduate Program in Veterinary Medicine, Department of Preventive Veterinary Medicine, Parasitic Diseases Laboratory, University Federal of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
| | - Letícia Trevisan Gressler
- Veterinary Microbiology and Immunology Laboratory, Farroupilha Federal Institute, campus Frederico Westphalen, Frederico Westphalen, Rio Grande do Sul, Brazil.
| | - Juliana Felipetto Cargnelutti
- Bacteriology Laboratory, Department of Preventive Veterinary Medicine, University Federal of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
| | - Fernanda Silveira Flôres Vogel
- Posgraduate Program in Veterinary Medicine, Department of Preventive Veterinary Medicine, Parasitic Diseases Laboratory, University Federal of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
| | - Rodrigo Casquero Cunha
- Laboratory of Veterinary Molecular Biology, Department of Preventive Veterinary Medicine, Federal University of Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil.
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Martínez JPH, de Giacometi M, de Mello AB, Martins KR, Cunha RC, Soares MP, Oliveira CB, França RT. First reported case of Trichomonas gallinae infection in red-breasted toucan (Ramphastos dicolorus). Vet Parasitol Reg Stud Reports 2024; 47:100962. [PMID: 38199700 DOI: 10.1016/j.vprsr.2023.100962] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 03/01/2023] [Revised: 09/22/2023] [Accepted: 11/27/2023] [Indexed: 01/12/2024]
Abstract
This study reports the infection and diagnosis of the protozoan morphologic complex Trichomonas gallinae in a baby red-breasted toucan (Ramphastos dicolorus). Nodular lesions on the soft palate and edema in the oral cavity were observed macroscopically. Microscopically, a granuloma with multiple layers of necrosis interspersed with inflammatory polymorphonuclear infiltrates was observed. Parasitism was confirmed by parasitological diagnosis, isolation of the flagellates in culture medium, and Polymerase Chain Reaction (PCR) using 5.8S ribosomal RNA (rRNA). Flanking internal transcribed spacer (ITS) gene regions were amplified by polymerase chain reaction, and the sequences were analyzed phylogenetically using MEGA 11 software. Phylogenetic analysis based on ITS1/5.8S rRNA/ITS2 sequences demonstrated high nucleotide identity with two Trichomonas sequences available in GenBank, which were more closely related to T. vaginalis (99%) than to T. gallinae (98%). In addition to being potential transmitters of this protozoan, rigorous monitoring of infectious and parasitic diseases in wild bird populations is essential for their preservation. The forms of transmission of Trichomonas sp. favor the occurrence of the disease in many non-Columbiformes species, which is essential for the monitoring of this disease in wild birds.
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Affiliation(s)
| | - Marjorie de Giacometi
- Departament of Microbiology and Parasitology, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Alexia Brauner de Mello
- Departament of Microbiology and Parasitology, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Kaue Rodriguez Martins
- Departament of Medicine Veterinary Preventive, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Rodrigo Casquero Cunha
- Departament of Medicine Veterinary Preventive, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Mauro P Soares
- Departament of Medicine Veterinary Preventive, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Camila Belmonte Oliveira
- Departament of Microbiology and Parasitology, Federal University of Pelotas, Pelotas, RS, Brazil
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Rahal NM, Luz GB, Martins KR, Gasperin BG, Feijó JDO, Dalto AGC, Rovani MT, Cunha RC, Corrêa MN. Association between chronic Anaplasma marginale and Babesia spp. infection and hematological parameters of taurine heifers. Rev Bras Parasitol Vet 2023; 32:e006423. [PMID: 37672469 PMCID: PMC10503823 DOI: 10.1590/s1984-29612023052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 07/17/2023] [Indexed: 09/08/2023]
Abstract
The aim of this study was to investigate the association between chronic Anaplasma marginale and Babesia spp. infection and hematological parameters of pregnant and non-pregnant taurine heifers. Blood samples from 94 females were collected on the first day (D-10) of timed artificial insemination (TAI) protocol and on pregnancy diagnosis (D+34). Hematological parameters were determined and compared between pregnant (PG) and non-pregnant (NPG) heifers, and within group at different sampling days. Real-time PCR (qPCR) was used to determine A. marginale and Babesia bovis infection, and for absolute quantification of Babesia spp. between PG and NPG groups. Correlation analysis was performed between the number of gDNA copies (CN) of Babesia spp. and hematological parameters. On D-10, mean hemoglobin concentration was higher for NPG, and hematocrit and total plasma protein were higher on D+34 for both groups. There was no difference in Babesia spp. CN between groups. In the first qPCR, all heifers were positive for A. marginale and B. bovis. Significant correlations were found between hemoglobin and erythrocyte and between hemoglobin and hematocrit (r = 0.8082 and r = 0.3009, respectively). Low levels of A. marginale and Babesia spp. did not affect hematological parameters of chronically infected pregnant and non-pregnant taurine heifers.
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Affiliation(s)
- Natalia Machado Rahal
- Núcleo de Pesquisa, Ensino e Extensão em Pecuária – NUPEEC, Faculdade de Veterinária, Universidade Federal de Pelotas – UFPel, Pelotas, RS, Brasil
| | - Gabriela Bueno Luz
- Núcleo de Pesquisa, Ensino e Extensão em Pecuária – NUPEEC, Faculdade de Veterinária, Universidade Federal de Pelotas – UFPel, Pelotas, RS, Brasil
| | - Kauê Rodriguez Martins
- Laboratório de Biologia Molecular Veterinária – LaBMol-Vet, Faculdade de Veterinária, Universidade Federal de Pelotas – UFPel, Pelotas, RS, Brasil
| | | | - Josiane de Oliveira Feijó
- Núcleo de Pesquisa, Ensino e Extensão em Pecuária – NUPEEC, Faculdade de Veterinária, Universidade Federal de Pelotas – UFPel, Pelotas, RS, Brasil
| | - André Gustavo Cabrera Dalto
- Rede Fibra, Faculdade de Veterinária, Universidade Federal de Pelotas – UFPel, RS, Brasil
- Setor de Grandes Ruminantes, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul – UFRGS, Porto Alegre, RS, Brasil
| | - Monique Tomazele Rovani
- Rede Fibra, Faculdade de Veterinária, Universidade Federal de Pelotas – UFPel, RS, Brasil
- Setor de Grandes Ruminantes, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul – UFRGS, Porto Alegre, RS, Brasil
| | - Rodrigo Casquero Cunha
- Laboratório de Biologia Molecular Veterinária – LaBMol-Vet, Faculdade de Veterinária, Universidade Federal de Pelotas – UFPel, Pelotas, RS, Brasil
| | - Marcio Nunes Corrêa
- Núcleo de Pesquisa, Ensino e Extensão em Pecuária – NUPEEC, Faculdade de Veterinária, Universidade Federal de Pelotas – UFPel, Pelotas, RS, Brasil
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de Freitas BR, da Rosa G, Roman IJ, Cunha RC, Gressler LT, Cargnelutti JF, Vogel FSF. Molecular detection of Toxoplasma gondii, Neospora caninum and Sarcocystis spp in tissues of Sus scrofa slaughtered in southern Brazil. Rev Bras Parasitol Vet 2023; 32:e004623. [PMID: 37585953 PMCID: PMC10449315 DOI: 10.1590/s1984-29612023048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 06/22/2023] [Indexed: 08/18/2023]
Abstract
The aim of this study was to determine the presence of deoxyribonucleic acid (DNA) from Toxoplasma gondii, Sarcocystis spp. and Neospora caninum, in tissues of wild boars slaughtered in southern Brazil. A total of 156 samples were collected from different organs of 25 wild boars, and DNA from at least one of the protozoa investigated was detected in 79 samples. To differentiate between infectious agents, restriction fragment length polymorphism was performed using the restriction enzymes DdeI and HpaII. For N. caninum, conventional PCR was performed with specific primers. The DNA of at least one of the studied pathogens was detected in each animal: 26.58% for T. gondii, 68.36% for Sarcocystis spp. and 5.06% for N. caninum. Coinfection between T. gondii and Sarcocystis spp. occurred in 14 animals, between T. gondii and N. caninum in only one male animal, between Sarcocystis spp. and N. caninum in a female, while co-infection with the three agents was equally observed in only one male animal. Considering the high frequency of detection and its zoonotic risk, especially T. gondii, it appears that wild boars can be potential sources of transmission of infectious agents and the adoption of monitoring measures in these populations should be prioritized.
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Affiliation(s)
- Bibiana Rodrigues de Freitas
- Laboratório de Biologia Molecular Veterinária, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Pelotas - UFPel, Campus Capão do Leão, Pelotas, RS, Brasil
| | - Gilneia da Rosa
- Programa de Pós-Graduação em Medicina Veterinária, Laboratório de Doenças Parasitárias, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
| | - Isac Junior Roman
- Programa de Pós-Graduação em Medicina Veterinária, Laboratório de Doenças Parasitárias, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
| | - Rodrigo Casquero Cunha
- Laboratório de Biologia Molecular Veterinária, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Pelotas - UFPel, Campus Capão do Leão, Pelotas, RS, Brasil
| | - Letícia Trevisan Gressler
- Laboratório de Microbiologia e Imunologia Veterinária, Instituto Federal Farroupilha, Campus Frederico Westphalen, Frederico Westphalen, RS, Brasil
| | - Juliana Felipetto Cargnelutti
- Laboratório de Bacteriologia, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
| | - Fernanda Silveira Flôres Vogel
- Programa de Pós-Graduação em Medicina Veterinária, Laboratório de Doenças Parasitárias, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
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Rodrigues de Freitas B, Roman IJ, Reis BR, de Souza Rodrigues F, Braünig P, Cargnelutti JF, Cunha RC, Vogel FSF. Sarcocyst Quantification and Viability: Freezing Treatment as an Alternative to Carcass Condemnation. Acta Parasitol 2023; 68:277-281. [PMID: 36705770 DOI: 10.1007/s11686-022-00656-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 07/05/2022] [Accepted: 12/28/2022] [Indexed: 01/28/2023]
Abstract
PURPOSE The inspection of animal products is important for controlling parasitic zoonoses. Some processes that guarantee food safety to consumers such as carcass condemnation cause economic losses. This study aimed to detect Sarcocystis cysts in cattle hearts obtained from slaughterhouses and to evaluate sarcocyst viability after freezing treatment. METHODS When myocardial tissues were minced and subjected to fresh examination, sarcocysts were observed in all analyzed tissues resulting in 21.73 cysts/g of tissue. Sarcocyst viability was verified after tissue freezing at 35 ± 2 °C and - 20 ± 2 °C for 0-12 h. After freezing, the tissues were minced, and sarcocysts were collected and stained with Tripan Blue. In addition, cysts were mechanically disrupted to check bradyzoite viability. RESULTS Cysts and bradyzoites were unviable at - 35 °C for ≥ 3 h and - 20 °C for ≥ 8 h. CONCLUSION These results suggest freezing treatment as an alternative to condemnation of cattle carcasses contaminated with Sarcocystis spp. Similar studies using freezing treatment with other animals infected by Sarcocystis must be conducted.
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Affiliation(s)
- Bibiana Rodrigues de Freitas
- Departamento de Medicina Veterinária Preventiva, Faculdade de Veterinária, Universidade Federal de Pelotas - UFPEL, Pelotas, Rio Grande do Sul, Brazil
| | - Isac Junior Roman
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63C, Santa Maria, Rio Grande do Sul, 97105-900, Brazil
| | - Bibiana Rossi Reis
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63C, Santa Maria, Rio Grande do Sul, 97105-900, Brazil
| | - Fernando de Souza Rodrigues
- Departamento de Medicina Veterinária Preventiva, Faculdade de Veterinária, Universidade Estadual de Londrina - UEL, Londrina, Paraná, Brazil
| | - Patrícia Braünig
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63C, Santa Maria, Rio Grande do Sul, 97105-900, Brazil
| | - Juliana Felipetto Cargnelutti
- Laboratório de Bacteriologia (LABAC), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63C, Santa Maria, Rio Grande do Sul, 97105-900, Brazil
| | - Rodrigo Casquero Cunha
- Departamento de Medicina Veterinária Preventiva, Faculdade de Veterinária, Universidade Federal de Pelotas - UFPEL, Pelotas, Rio Grande do Sul, Brazil
| | - Fernanda Silveira Flôres Vogel
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63C, Santa Maria, Rio Grande do Sul, 97105-900, Brazil.
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Santos FDS, Maubrigades LR, Gonçalves VS, Alves Ferreira MR, Brasil CL, Cunha RC, Conceição FR, Leite FPL. Immunomodulatory effect of short-term supplementation with Bacillus toyonensis BCT-7112 T and Saccharomyces boulardii CNCM I-745 in sheep vaccinated with Clostridium chauvoei. Vet Immunol Immunopathol 2021; 237:110272. [PMID: 34029878 DOI: 10.1016/j.vetimm.2021.110272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 04/17/2020] [Revised: 02/18/2021] [Accepted: 05/19/2021] [Indexed: 01/05/2023]
Abstract
The bacterium Clostridium chauvoei is the causative agent of blackleg in livestock, and vaccination is the most effective means of prevention. The aim of this study was to assess the effect of short-term supplementation with Bacillus toyonensis and Saccharomyces boulardii on the immune response to a C. chauvoei vaccine in sheep. Sheep were vaccinated subcutaneously on day 0 and received a booster dose on day 21, with 2 mL of a commercial vaccine formulated with inactivated C. chauvoei bacterin adsorbed on aluminum hydroxide. Probiotics were orally administered B. toyonensis (3 × 108 cfu) and S. boulardii (3 × 108 cfu) over five days prior to the first and second doses of the vaccine. Sheep supplemented with B. toyonensis and S. boulardii showed significantly higher specific IgG, IgG1, and IgG2 titers (P<0.05), with approximately 24- and 14-fold increases in total IgG levels, respectively, than the nonsupplemented group. Peripheral blood mononuclear cells from the supplemented group had increased mRNA transcription levels of the IFN-γ, IL2, and Bcl6 genes. These results demonstrate an adjuvant effect of short-term supplementation with B. toyonensis and S. boulardii on the immune response against the C. chauvoei vaccine in sheep.
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Affiliation(s)
- Francisco Denis Souza Santos
- Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-900, Brazil
| | - Lucas Reichert Maubrigades
- Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-900, Brazil
| | - Vitória Sequeira Gonçalves
- Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-900, Brazil
| | - Marcos Roberto Alves Ferreira
- Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-900, Brazil
| | - Carolina Litchina Brasil
- Instituto de Biologia, Programa de Pós-Graduação em Parasitologia, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-900, Brazil
| | - Rodrigo Casquero Cunha
- Faculdade de Veterinária, Programa de Pós-Graduação em Veterinária, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-900, Brazil
| | - Fabricio Rochedo Conceição
- Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-900, Brazil
| | - Fábio Pereira Leivas Leite
- Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-900, Brazil.
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Piraine REA, Gonçalves VS, Dos Santos Junior AG, Cunha RC, de Albuquerque PMM, Conrad NL, Leite FPL. Expression cassette and plasmid construction for Yeast Surface Display in Saccharomyces cerevisiae. Biotechnol Lett 2021; 43:1649-1657. [PMID: 33934257 DOI: 10.1007/s10529-021-03142-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 02/04/2021] [Accepted: 04/23/2021] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Develop a Cell Surface Display system in Saccharomyces cerevisiae, based on the construction of an expression cassette for pYES2 plasmid. RESULTS The construction of an expression cassette containing the α-factor signal peptide and the C-terminal portion of the α-agglutinin protein was made and its sequence inserted into a plasmid named pYES2/gDαAgglutinin. The construction allows surface display of bovine herpesvirus type 5 (BoHV-5) glycoprotein D (gD) on S. cerevisiae BY4741 strain. Recombinant protein expression was confirmed by dot blot, and indirect immunofluorescence using monoclonal anti-histidine antibodies and polyclonal antibodies from mice experimentally vaccinated with a recombinant gD. CONCLUSIONS These results demonstrate that the approach and plasmid used represent not only an effective system for immobilizing proteins on the yeast cell surface, as well as a platform for immunobiologicals development.
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Affiliation(s)
- Renan Eugênio Araujo Piraine
- Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Vitória Sequeira Gonçalves
- Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | | | - Rodrigo Casquero Cunha
- Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brazil.,Programa de Pós-Graduação em Veterinária, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | | | - Neida Lucia Conrad
- Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Fábio Pereira Leivas Leite
- Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brazil. .,Programa de Pós-Graduação em Veterinária, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, RS, Brazil.
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Giachetto PF, Cunha RC, Nhani A, Garcia MV, Ferro JA, Andreotti R. Gene Expression in the Salivary Gland of Rhipicephalus (Boophilus) microplus Fed on Tick-Susceptible and Tick-Resistant Hosts. Front Cell Infect Microbiol 2020; 9:477. [PMID: 32039052 PMCID: PMC6985549 DOI: 10.3389/fcimb.2019.00477] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 12/24/2019] [Indexed: 01/10/2023] Open
Abstract
The success of cattle tick fixation largely depends on the secretion of substances that alter the immune response of the host. The majority of these substances are expressed by the parasite salivary gland and secreted in tick saliva. It is known that hosts can mount immune responses against ticks and bovine European breeds, and bovine industrial crossbreeds are more susceptible to infestations than are Bos indicus cattle. To identify candidates for the development of novel control strategies for the cattle tick Rhipicephalus (Boophilus) microplus, a salivary gland transcriptome analysis of engorged females fed on susceptible or resistant hosts was performed. Using RNA-Seq, transcriptomes were de novo assembled and produced a total of 235,451 contigs with 93.3% transcriptome completeness. Differential expression analysis identified 137 sequences as differentially expressed genes (DEGs) between ticks raised on tick-susceptible or tick-resistant cattle. DEGs predicted to be secreted proteins include innexins, which are transmembrane proteins that form gap junction channels; the transporters Na+/dicarboxylate, Na+/tricarboxylate, and phosphate transporter and a putative monocarboxylate transporter; a phosphoinositol 4-phosphate adaptor protein; a cysteine-rich protein containing a trypsin inhibitor-like (TIL) domain; a putative defense protein 3 containing a reeler domain; and an F-actin-uncapping protein LRRC16A with a CARMIL_C domain; these genes were upregulated in ticks fed on tick-susceptible cattle. DEGs predicted to be non-secreted proteins included a small heat shock protein and the negative elongation factor B-like, both acting in a coordinated manner to increase HSP transcript levels in the salivary glands of the ticks fed on tick-susceptible cattle; the 26S protease regulatory subunit 6B and another chaperone with similarity to calnexin, also upregulated in ticks fed on tick-susceptible cattle; an EF-hand calcium binding protein and a serine carboxypeptidase (SCP), both involved in the blood coagulation cascade and upregulated in ticks fed on tick-susceptible cattle; and two ribosomal proteins, the 60S acidic ribosomal protein P2 and the 60S ribosomal protein L19. These results help to characterize cattle tick salivary gland gene expression in tick-susceptible and tick-resistant hosts and suggest new putative targets for the control of tick infestations, as those genes involved in the mechanism of stress response during blood feeding.
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Affiliation(s)
| | - Rodrigo Casquero Cunha
- Bolsista do CNPq (157460/2018-5), Programa de Pós-Graduação em Biotecnologia, Universidade Federal de Pelotas, Pelotas, Brazil
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Vianna AM, Santos AC, Cunha RC, de Souza Stori de Lara AP, Weege GB, Leivas Leite FP. Antigenicity assessment of the Theileria equi merozoite antigen (EMA-2) expressed in Pichia pastoris in mice and horses. Exp Parasitol 2019; 206:107757. [PMID: 31494216 DOI: 10.1016/j.exppara.2019.107757] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 11/18/2022]
Abstract
Equine theileriosis is a severe equine disease caused by the protozoan Theileria equi, which is prevalent in tropical and subtropical areas. In this study, a recombinant equi merozoite antigen-2 (rEMA-2) of T. equi was used as an immunogen. Two groups of 10 mice each were divided into control and vaccinated groups. Sixty mares seronegative for theileriosis were divided in two groups, one vaccinated and another group as a control animal. Mice and mares of the vaccinated groups were inoculated with 150 μL of the vaccine containing 50 μg of rEMA-2 and 2 mL of the vaccine containing 200 μg of rEMA-2, respectively, at days 0 and 21. The immunogenicity of rEMA-2 was evaluated by ELISA and fluorescent antibody test (IFAT) using serum from vaccinated mice, mares and antigenicity in naturally infected horse. At every point throughout the ELISA study, there were significant differences between the vaccinated and control groups (p < 0.05). The vaccine induced 3- and 4-fold IgG increases in mice at the 14th and 28th day, respectively, compared to the control group. The horses' IgG dynamics showed a significant (p < 0.05) increase in the total IgG titer as early as day 7, which increased until day 28 at which time a more significant (p < 0.001) IgG titer was observed. In evaluating the isotypes, we observed a trend similar to that of total IgG, where IgG(T) (IgG3-5) were significantly (p < 0.05) more elevated than the other isotypes analyzed, followed by IgGb (IgG4-7) and IgGa (IgG1). Positive fluorescence was detected by IFAT, suggesting that the protein is immunogenic and conserves some epitopes identical to the native T. equi antigens present in the equine blood smear. Thus, our results suggest that rEMA-2 can be a promising vaccinal antigen.
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Affiliation(s)
- Ana Muñoz Vianna
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-900, Brazil.
| | - Alice Correa Santos
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-900, Brazil.
| | - Rodrigo Casquero Cunha
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-900, Brazil.
| | | | - Guilherme Borges Weege
- Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas, Pelotas, RS, Brazil.
| | - Fábio Pereira Leivas Leite
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-900, Brazil; Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas, Pelotas, RS, Brazil.
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11
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Araujo IL, Dummer LA, Rodrigues PRC, Dos Santos AG, Fischer G, Cunha RC, Leite FPL. Immune responses in bovines to recombinant glycoprotein D of bovine herpesvirus type 5 as vaccine antigen. Vaccine 2018; 36:7708-7714. [PMID: 30381153 DOI: 10.1016/j.vaccine.2018.10.080] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 07/20/2018] [Revised: 10/19/2018] [Accepted: 10/21/2018] [Indexed: 11/26/2022]
Abstract
Bovine herpesvirus 5 (BoHV-5) is responsible for outbreaks of meningoencephalitis that cause important economic losses in young cattle. BoHV-5 glycoprotein D (gD5) is essential for attachment and penetration into permissive cells and targeting of host immune systems, inducing strong humoral and cellular immune responses. The aim of this study was to evaluate the vaccinal immune response of vaccines formulated with the recombinant BoHV-5 gD (rgD5) in bovines. For the experiment, 72 heifers were randomly allotted into 6 different groups with 12 animals each. Group 1: vaccine formulated using inactivated BoHV-5 (iBoHV-5) adjuvanted with ISA50V2; Group 2: iBoHV-5 associated with 100 µg of rgD5 adjuvanted with ISA50V2; Group 3: 100 µg of rgD5 adjuvanted with ISA50V2; Group 4: 100 µg of rgD5 adjuvanted with Al(OH)3; Group 5: commercial vaccine; and Group 6: control group. Two doses were administered in a 26-day interval and the third after 357 days from primo vaccination. Cattle vaccinated with the vaccines formulated with iBoHV-5 plus rgD5 showed a significant (p < 0.01) five-fold increase in total immunoglobulin G (IgG) for BoHV-5, BoHV-1, and rgD5 as compared with the commercial and control groups. Also, a significant (p < 0.05) increase in IgG1 and IgG2a levels was induced in serum for rgD5. In addition, these same vaccines showed significant (p < 0.01) four-fold higher titers of BoHV-1 and -5 neutralizing antibodies. The results demonstrated that the rgD5 conserved important epitopes that were able to stimulate bovine humoral immunity response capable of viral neutralization of BoHV-1 and -5, suggesting it as a promising vaccine antigen to be used in vaccine for BoHV-1 and -5 endemic areas.
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Affiliation(s)
- Itauá Leston Araujo
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas 96010-900, Brazil
| | - Luana Alves Dummer
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas 96010-900, Brazil
| | - Paulo Ricardo Centeno Rodrigues
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas 96010-900, Brazil; Laboratório de Virologia e Imunologia Animal, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul 96010-900, Brazil
| | - Alceu Gonçalves Dos Santos
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas 96010-900, Brazil; Laboratório de Virologia e Imunologia Animal, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul 96010-900, Brazil
| | - Geferson Fischer
- Laboratório de Virologia e Imunologia Animal, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul 96010-900, Brazil
| | - Rodrigo Casquero Cunha
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas 96010-900, Brazil
| | - Fábio Pereira Leivas Leite
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas 96010-900, Brazil; Laboratório de Virologia e Imunologia Animal, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul 96010-900, Brazil.
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Blecha IMZ, Csordas BG, Aguirre ADAR, Cunha RC, Garcia MV, Andreotti R. Analysis of Bm86 conserved epitopes: is a global vaccine against Cattle Tick Rhipicephalus microplus possible? ACTA ACUST UNITED AC 2018; 27:267-279. [PMID: 30133596 DOI: 10.1590/s1984-296120180056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 07/10/2018] [Indexed: 12/22/2022]
Abstract
The cattle tick Rhipicephalus microplus causes significant economic losses in agribusiness. Control of this tick is achieved mainly through the application of chemical acaricides, often resulting in contamination of animal food products and of the environment. Another major concern associated with acaricide use is the increasing reports of resistance of this tick vector against the active ingredients of many commercial products. An alternative control method is vaccination. However, the commercially available vaccine based on a protein homologous to Bm86 exhibits variations in efficacy relative to the different geographical locations. This study aimed to identify antigenic determinants of the sequences of proteins homologous to Bm86. Phylogenetic analyses were performed to determine the extent of divergence between different populations of R. microplus to identify the sequence that could be used as a universal vaccine against the multiple geographically distinct populations of R. microplus and related tick species. Considering the extensive sequence and functional polymorphism observed among strains of R. microplus from different geographical regions, we can conclude that it may be possible to achieve effective vaccination against these cattle ticks using a single universal Bm86-based antigen.
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Affiliation(s)
- Isabella Maiumi Zaidan Blecha
- Laboratório de Biologia do Carrapato, Embrapa Gado de Corte, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Campo Grande, MS, Brasil.,Programa de Pós-graduacão em Ciência Animal, Faculdade de Medicina Veterinária e Zootecnia - FAMEZ, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS, Brasil
| | - Bárbara Guimarães Csordas
- Laboratório de Biologia do Carrapato, Embrapa Gado de Corte, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Campo Grande, MS, Brasil.,Programa de Pós-graduação em Doenças Infecciosas e Parasitárias, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS, Brasil
| | | | - Rodrigo Casquero Cunha
- Programa de Pós-graduação em Biotecnologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico - CDTec, Universidade Federal de Pelotas - UFPel, Pelotas, RS, Brasil
| | - Marcos Valério Garcia
- Laboratório de Biologia do Carrapato, Embrapa Gado de Corte, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Campo Grande, MS, Brasil.,Programa de Desenvolvimento Científico Regional - DCR, Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia - FUNDECT, Governo do Estado de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - Renato Andreotti
- Embrapa Gado de Corte, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Campo Grande, MS, Brasil
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Zimmermann NP, Aguirre ADAR, Rodrigues VDS, Garcia MV, Medeiros JF, Blecha IMZ, Duarte PO, Cruz BC, Cunha RC, Martins TF, Andreotti R. Wildlife species, Ixodid fauna and new host records for ticks in an Amazon forest area, Rondônia, Brazil. ACTA ACUST UNITED AC 2018; 27:177-182. [PMID: 29846452 DOI: 10.1590/s1984-296120180022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 03/03/2018] [Indexed: 11/21/2022]
Abstract
The objective of this work was to evaluate the diversity of ticks associated with free-living animals and to investigate new host records for ticks. Ticks were collected from animals rescued during the flood of the Jamari River in the municipality of Ariquemes, state of Rondônia, North Region of Brazil. A total of 39 animals were captured, out of which 10 were amphibians, 19 were reptiles and 10 were mammals. A total of 127 ticks of the Amblyomma genus were collected from these animals, distributed among seven species: Amblyomma dissimile, Amblyomma geayi, Amblyomma humerale , Amblyomma longirostre, Amblyomma nodosum , Amblyomma rotundatum and Amblyomma varium. In addition, one specimen of Rhipicephalus (Boophilus) microplus was collected. Among these specimens, 85 were adults and 42 were nymphs, with A. rotundatum being the most prevalent species. An Amblyomma spp. larvae was also collected from a lizard (Uranoscodon superciliosus), and one Amblyomma calcaratum and one Amblyomma dubitatum were recovered from the environment, thus totaling 130 ticks. Among the Ixodidae collected from different hosts, we provide the first report for the species A. rotundatum parasitizing Rhinella major, U. superciliosus, Leptophis ahaetulla, Chironius multiventris, and Mastigodryas boddaerti, as well as of A. humerale parasitizing U. superciliosus, A. geayi parasitizing Choloepus didactylus, and Rhipicephalus (B.) microplus parasitizing Alouatta puruensis.
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Affiliation(s)
- Namor Pinheiro Zimmermann
- Laboratório de Biologia do Carrapato, Embrapa Gado de Corte, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Campo Grande, MS, Brasil.,Centro Universitário da Grande Dourados, Dourados, MS, Brasil
| | - André de Abreu Rangel Aguirre
- Programa de Pós-Graduação em Doenças Infecciosas e Parasitárias, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS, Brasil.,Laboratório de Entomologia Médica, Fundação Oswaldo Cruz - FIOCRUZ, Porto Velho, RO, Brasil
| | - Vinicius da Silva Rodrigues
- Laboratório de Biologia do Carrapato, Embrapa Gado de Corte, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Doenças Infecciosas e Parasitárias, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS, Brasil
| | - Marcos Valério Garcia
- Laboratório de Biologia do Carrapato, Embrapa Gado de Corte, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Campo Grande, MS, Brasil.,Programa de Desenvolvimento Científico Regional - DCR, Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia - FUNDECT, Governo do Estado de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | | | - Isabella Maiumi Zaidan Blecha
- Laboratório de Biologia do Carrapato, Embrapa Gado de Corte, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Ciência Animal, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS, Brasil
| | - Pamella Oliveira Duarte
- Laboratório de Biologia do Carrapato, Embrapa Gado de Corte, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Doenças Infecciosas e Parasitárias, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS, Brasil
| | - Breno Cayeiro Cruz
- Programa de Pós-Graduação em Patologia Animal, Departamento de Patologia Veterinária, Faculdade de Ciências Agrárias e Veterinárias - FCAV, Universidade Estadual Paulista - UNESP, Jaboticabal, SP, Brasil
| | - Rodrigo Casquero Cunha
- Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico - CDTec, Universidade Federal de Pelotas - UFPEL, Pelotas, RS, Brasil
| | - Thiago Fernandes Martins
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo - USP, São Paulo, SP, Brasil
| | - Renato Andreotti
- Embrapa Gado de Corte, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Campo Grande, MS, Brasil
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Csordas BG, Cunha RC, Garcia MV, da Silva SS, Leite FL, Andreotti R. Molecular characterization of the recombinant protein RmLTI-BmCG-LTB: Protective immunity against Rhipicephalus (Boophilus) microplus. PLoS One 2018; 13:e0191596. [PMID: 29415034 PMCID: PMC5802849 DOI: 10.1371/journal.pone.0191596] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 01/08/2018] [Indexed: 11/26/2022] Open
Abstract
The bovine tick Rhipicephalus (Boophilus) microplus is found in several tropical and subtropical regions of the world. This parasite transmits pathogens that cause disease, such as babesiosis (Babesia bovis and B. bigemina) and anaplasmosis (Anaplasma marginale). Tick infestations cause enormous livestock losses, and controlling tick infestations and the transmission of tick-borne diseases remains a challenge for the livestock industry. Because the currently available commercial vaccines offer only partial protection against R. (B.) microplus, there is a need for more efficient vaccines. Several recombinant antigens have been evaluated using different immunization strategies, and they show great promise. This work describes the construction and immunological characterization of a multi-antigen chimera composed of two R. (B.) microplus antigens (RmLTI and BmCG) and one Escherichia coli antigen (B subunit, LTB). The immunogenic regions of each antigen were selected and combined to encode a single polypeptide. The gene was cloned and expressed in E. coli. For all of the experiments, two groups (treated and control) of four Angus heifers (3-6 months old) were used. The inoculation was performed via intramuscular injection with 200 μg of purified recombinant chimeric protein and adjuvated. The chimeric protein was recognized by specific antibodies against each subunit and by sera from cattle inoculated with the chimera. Immunization of RmLTI-BmCG-LTB cattle reduced the number of adult female ticks by 6.29% and vaccination of cattle with the chimeric antigen provided 55.6% efficacy against R. (B.) microplus infestation. The results of this study indicate that the novel chimeric protein is a potential candidate for the future development of a more effective vaccine against R. (B.) microplus.
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Affiliation(s)
- Bárbara Guimarães Csordas
- Programa de Pós-graduação em Doenças Infecciosas e Parasitárias, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Bolsista de Doutorado pela Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Campo Grande, Mato Grosso do Sul, Brasil
| | - Rodrigo Casquero Cunha
- Programa de Pós-graduação em Biotecnologia, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brasil
| | - Marcos Valério Garcia
- Bolsista de Pós-Doutorado, Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado de Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brasil
- Laboratório de Biologia Molecular do Carrapato, Departamento de Sanidade Animal, Embrapa Gado de Corte, Campo Grande, Mato Grosso do Sul, Brasil
| | - Sérgio Silva da Silva
- Laboratório de Doenças Parasitárias, Faculdade de Medicina Veterinária, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brasil
| | - Fábio Leivas Leite
- Programa de Pós-graduação em Biotecnologia, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brasil
| | - Renato Andreotti
- Laboratório de Biologia Molecular do Carrapato, Departamento de Sanidade Animal, Embrapa Gado de Corte, Campo Grande, Mato Grosso do Sul, Brasil
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Andreotti R, Giachetto PF, Cunha RC. Advances in tick vaccinology in Brazil: from gene expression to immunoprotection. Front Biosci (Schol Ed) 2018; 10:127-142. [PMID: 28930522 DOI: 10.2741/s504] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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]
Abstract
Rhipicephalus (Boophilus) microplus has substantial economic impact on the cattle breeding industry and, chemical control and tick resistance development are the major concern. There is a worldwide search for new options, and control using vaccines has been the main focus nowadays. Studies performed in Brazil found that Bm86-based immunization of bovines reduced the infestation of R. (B.) microplus of vaccinated bovines by 45% to 60%. Native Boophilusmicroplus tripsin inhibitors (BmTIs) with trypsin-, kallikrein-, and elastase-inhibiting activities have been used as immunogens in bovines reaching 72.8.% of efficacy. The reverse vaccinology approach has also been used for antigen search using transcriptome analysis to identify and characterize potential antigens. Study has generated more than 600 million sequences using RNA-seq of larvae, nymphs, salivary glands, intestines, and ovaries of the tick R. (B) microplus. Based on the set of transcripts obtained using this strategy, a total of 20,326 protein sequences have been identified. A pipeline analysis built in house identified the protein sequences that were most likely to be immunogenic based on the overall structural characteristic analysis.
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Affiliation(s)
- Renato Andreotti
- Laboratorio de Biologia Molecular do Carrapato, Sanidade Animal, Embrapa Gado de Corte, Campo Grande, MS, Brasil,
| | | | - Rodrigo Casquero Cunha
- Bolsista PNPD/Capes, Programa de Pos-Graduação em Biotecnologia, Departamento de Biotecnologia, Centro de Desenvolvimento Tecnologico, CDTec, Universidade Federal de Pelotas, Pelotas, RS, Brazil
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Júnior SFV, Cunha RC, Pereira DIB, Botton SDÁ, Ladeira SRL, Júnior TL, Sallis ESV. Identification of Virulence Factors of Escherichia coli Isolates from Fecal Samples of Calves in Southern Brazil. ACTA SCI VET 2017. [DOI: 10.22456/1679-9216.80441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Background: Escherichia coli (E. coli) is an enteropathogen that commonly causes diarrhea in calves. However, not all E. coli isolates are pathogenic. The aim of this study was to identify E. coli virulence factors derived from fecal samples collected in the southern region of Rio Grande do Sul state (RS) from calves with and without diarrhea, as well as investigate the antimicrobial susceptibility of E. coli isolates from calves with diarrhea.Materials, Methods & Results: Forty stool samples were collected in 12 farms, each one from calves having one day to six months of age, with and without diarrhea. The total DNA of from these isolates was extracted and a PCR using primers specific for the virulence factors Stx1, Eae, F41, F5 and STa was conducted. The susceptibility testing used the disk diffusion method and the susceptibility profile was evaluated against the following antimicrobials: ampicillin, penicillin, chloramphenicol, enrofloxacin, gentamicin, trimethoprim, sulfonamide, tetracycline and streptomycin. From all calves, 15 (15/40, 37.5%) had diarrheal stools and 25 (25/40, 62.5%) had normal or semi-liquid stools. Twelve (12/40; 30%) E. coli isolates showed at least one virulence factor. These factors were found in four isolates (4/15; 26.6%) from diarrheal stools and eight isolates (8/25; 28.5%) from normal stool. The Stx1 factor was identified in five isolates (5/40; 12.5%), and the Eae and the Sta factors in one (1/40; 0.2%) and in atypical associations between Stx1 and Eae and also between Eae and F41 in two isolates (2/40; 0.5%). Also, the Eae and Sta factors were identified in one isolate (1/40; 0.2%). The susceptibility test showed resistance to penicillin and tetracycline in 93% and 80% of the tested isolates, respectively.Discussion: The identification of virulence factors is necessary because E. coli is an enterobacterium present in calves gastrointestinal tract, to prove its pathogenicity. The virulence factor most commonly found in E. coli isolates derived from feces of calves with and without diarrhea in the southern region of the RS was the Stx1 (Shiga toxin-producing E. coli STEC). It is likely that the highest occurrence of E. coli isolates positive for the Stx1 virulence factor was due to the fact that cattle were the main reservoirs of this type of bacteria. The occurrence of enterohemorrhagic E. coli (EHEC) in animals of nine and 34 days of life, respectively, is highlighted. Studies have shown that contamination of animal foods with EHEC can cause enteric disorders, hemorrhagic colitis, and uremic hemolytic syndrome (UHS) in humans. Although in the present study the identification of the Stx2 factor was not performed, authors describe that the presence of the genes encoding Stx2 and Eae is determinant in the occurrence of UHS. In the susceptibility test, it was observed that E. coli isolates from diarrheal stools showed resistance to antimicrobials penicillin (10 mg) and tetracycline (30 mg) [93% and 80%, respectively], ampicillin (10 mg) [47%], streptomycin (10 mg) [47%], trimethoprim (5 mg) [47%] and sulfonamide (300 mg) [53%]. Although the percentage of antimicrobial resistance varies among studies, it is believed that the indiscriminate use of antimicrobial therapies as a common practice among rural properties contributes to bacterial resistance to these drugs. The sensitivity profile to antimicrobials showed that the analyzed Escherichia coli isolates are resistant to the antimicrobials commonly used for diarrhea treatment in the southern region of the Rio Grande do Sul state, Southern Brazil.
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Csordas BG, Garcia MV, Cunha RC, Giachetto PF, Blecha IMZ, Andreotti R. New insights from molecular characterization of the tick Rhipicephalus (Boophilus) microplus in Brazil. ACTA ACUST UNITED AC 2016; 25:317-26. [PMID: 27579530 DOI: 10.1590/s1984-29612016053] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 07/20/2016] [Indexed: 11/21/2022]
Abstract
The Rhipicephalus (Boophilus) microplus complex currently consists of five taxa, namely R. australis, R. annulatus, R. (B.) microplus clade A sensu, R. microplus clade B sensu, and R. (B.) microplus clade C sensu. Mitochondrial DNA-based methods help taxonomists when they are facing the morpho-taxonomic problem of distinguishing members of the R. (B.) microplus complex. The purpose of this study was to perform molecular characterization of ticks in all five regions of Brazil and infer their phylogenetic relationships. Molecular analysis characterized 10 haplotypes of the COX-1 gene. Molecular network analysis revealed that haplotype H-2 was the most dispersed of the studied populations (n = 11). Haplotype H-3 (n = 2) had the greatest genetic differentiation when compared to other Brazilian populations. A Bayesian phylogenetic tree of the COX-1 gene obtained strong support. In addition, it was observed that the population of R. (B.) microplus haplotype H-3 exhibited diverging branches among the other Brazilian populations in the study. The study concludes that the different regions of Brazil have R. (B.) microplus tick populations with distinct haplotypes.
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Affiliation(s)
- Bárbara Guimarães Csordas
- Pós-graduação em Doenças Infecciosas e Parasitárias, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS, Brasil
| | - Marcos Valério Garcia
- Laboratório de Biologia Molecular do Carrapato, Departamento de Sanidade Animal, Embrapa Gado de Corte, Campo Grande, MS, Brasil
| | - Rodrigo Casquero Cunha
- Programa de Pós-graduação em Biotecnologia, Universidade Federal de Pelotas - UFPel, Pelotas, RS, Brasil
| | | | - Isabella Maiumi Zaidan Blecha
- Programa de Pós-graduação em Ciência Animal, Faculdade de Medicina Veterinária, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS, Brasil
| | - Renato Andreotti
- Laboratório de Biologia Molecular do Carrapato, Departamento de Sanidade Animal, Embrapa Gado de Corte, Campo Grande, MS, Brasil
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Cunha RC, Andreotti R, Cominetti MC, Silva EA. Detection of Leishmania infantum in Lutzomyia longipalpis captured in Campo Grande, MS. ACTA ACUST UNITED AC 2016; 23:269-73. [PMID: 25054512 DOI: 10.1590/s1984-29612014049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 05/08/2014] [Indexed: 11/22/2022]
Abstract
Leishmaniasis is a zoonotic disease caused by protozoa of the genus Leishmania (Ross, 1903) and is the focus of considerable attention in human and veterinary medicine. In the city of Campo Grande, MS, the causative agent of visceral leishmaniasis is Leishmania infantum (= L. chagasi) primary vector, comprising approximately 92.9% of the local sandfly population, is Lutzomyia longipalpis. The aim of this work was to compare real-time PCR with PCR as a tool for the detection of the kinetoplast DNA (kDNA) of L. infantum in sandflies. Sandflies of this species were caught, and a total of 38 samples with 1-4 individuals in each sample were obtained; these were distributed across 13 districts and divided between seven urban areas of the city of Campo Grande, MS. Three positive samples were found by PCR and, when using real-time PCR, this was able to detect the presence of this agent in 6 of the 13 districts sampled, which were all located on the outskirts of the city, where indicates the greater enzootic potential of these regions, as they are closer to natural forest reserves. We conclude that real-time PCR can be used for epidemiological studies of L. infantum.
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Affiliation(s)
- Rodrigo Casquero Cunha
- Programa de Pós-graduação em Biotecnologia, Universidade Federal de Pelotas ? UFPel, Pelotas, RS, Brasil
| | | | - Marlon Cezar Cominetti
- Programa de Pós-graduação em Doenças Infecciosas e Parasitárias, Universidade Federal de Mato Grosso do Sul ? UFMS, Campo Grande, RS, Brasil
| | - Elaine Araújo Silva
- Centro de Controle de Zoonoses ? CCZ, Secretaria Municipal de Saúde, Campo Grande, MS, Brasil
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Oshiro LM, Motta-Castro ARC, Freitas SZ, Cunha RC, Dittrich RL, Meirelles ACF, Andreotti R. Neospora caninum and Toxoplasma gondii serodiagnosis in human immunodeficiency virus carriers. Rev Soc Bras Med Trop 2016; 48:568-72. [PMID: 26516966 DOI: 10.1590/0037-8682-0151-2015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 07/23/2015] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Neospora caninum and Toxoplasma gondii belong to the Sarcocystidae family, and both have one definitive and various intermediary hosts. Owing to their weak immune systems, immunocompromised persons might be prone to opportunistic infections. The aim of this study was to investigate the presence of anti- N. caninum and anti- T. gondii antibodies in immunocompromised individuals. METHODS This cross-sectional study investigated the rates of N. caninum and T. gondii , as assessed using immunofluorescent antibody reaction (IFAT) with 1:50 and 1:16 dilution, respectively, in patients with human immunodeficiency virus (HIV). RESULTS The seropositivity for N. caninum was 26.1% (81/310) in Mato Grosso do Sul and 31.2% (10/32) in Paraná and for T. gondii was 76.8% (238/310) in Mato Grosso do Sul and 68.7% (22/32) in Paraná. CONCLUSIONS There is evidence of anti- N caninum and anti- T. gondii antibodies in patients with HIV. Other aspects of T. gondii , which is a zoonosis, and N. caninum , which might affect immunodeficient individuals, need to be evaluated and reported.
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Affiliation(s)
- Leandra Marla Oshiro
- Programa de Graduação em Doenças Infecciosas e Parasitárias, Universidade Federal de Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | | | - Solange Zacalusni Freitas
- Curso de Farmácia Bioquímica, Universidade Federal de Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Rodrigo Casquero Cunha
- Departamento de Biotecnologia, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | | | | | - Renato Andreotti
- Laboratório de Biologia Molecular, Sanidade Animal, Embrapa Gado de Corte, Campo Grande, Mato Grosso do Sul, Brazil
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20
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Aguirre ADAR, Lobo FP, Cunha RC, Garcia MV, Andreotti R. Design of the ATAQ peptide and its evaluation as an immunogen to develop a Rhipicephalus vaccine. Vet Parasitol 2016; 221:30-8. [PMID: 27084468 DOI: 10.1016/j.vetpar.2016.02.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [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: 03/25/2015] [Revised: 02/21/2016] [Accepted: 02/27/2016] [Indexed: 11/26/2022]
Abstract
Tick infestation may cause several problems including affecting domestic animal health and reducing the production of meat and milk, among others. Resistance to several classes of acaricides have been reported, forcing researchers to search for alternative measures, such as vaccines against ticks, to ensure tick control while having no or at least low negative impacts on the environment and public health. However, the current commercially available vaccines in different strains of Rhipicephalus microplus are reported to be of low efficacy. Fortunately, reverse vaccinology approaches have shown positive results in the new generation of vaccines. On this basis, a synthetic peptide from the ATAQ protein, which is present in the gut and Malpighi tubes of R. microplus, was synthesized. The ATAQ proteins were isolated, characterized and sequenced from several species of the genus Rhipicephalus. The alignment showed 93.3% identity among DNA sequences of ATAQs from these species. Because of this, immunization trials with this peptide were conducted on mice, rabbits and cattle to evaluate the humoral immune response and the efficacy against Rhipicephalus sanguineus in addition to R. microplus. Based on recent results, we conclude that reverse vaccinology is a promising approach because it is more accurate and faster than conventional methods in the detection of potential antigens to use in anti-tick vaccines. It is not only applicable against R. microplus but also against tick species that play important roles in spreading other diseases. ATAQ proteins should be considered as the antigen in new trials to develop a multi-antigenic vaccine. Although these peptides behave as hapten and are not able to be recognized by the immune system on its own, using carriers and adjuvants helps its presentation and induces strong immune responses. Furthermore, an efficiency of 35% reduction in overall life cycle parameters was reported for R. microplus (98% for ELISA responder animals) and 47% for R. sanguineus. Although not yet enough to prevent the environment to infestation of ticks, this still constitutes a promising strategy that could be applied to integrated measures on tick control and in new research that develops anti-tick vaccines.
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Affiliation(s)
- André de Abreu Rangel Aguirre
- Programa de Pós-graduação em Ciência Animal, FAMEZ, Universidade Federal de Mato Grosso do Sul, Av. Felinto Müller, No. 2443, Vila Ipiranga, CEP 79074-460 Campo Grande, MS, Brazil; Fundação Oswaldo Cruz, Fiocruz Rondônia, Rua da Beira, No. 7671, Bairro Lagoa, CEP 76812-245 Porto Velho, RO, Brazil.
| | - Francisco Pereira Lobo
- Embrapa Informática Agropecuária, Av. André Tosello, No. 209 Campus Unicamp, Barão Geraldo, CEP 13083-886 Campinas, SP, Brazil
| | - Rodrigo Casquero Cunha
- Programa de Pós-graduação em Ciência Animal, FAMEZ, Universidade Federal de Mato Grosso do Sul, Av. Felinto Müller, No. 2443, Vila Ipiranga, CEP 79074-460 Campo Grande, MS, Brazil; Embrapa Gado de Corte, Av. Rádio Maia, No. 830, Zona Rural, CEP 79106-550 Campo Grande, MS, Brazil
| | - Marcos Valério Garcia
- Embrapa Gado de Corte, Av. Rádio Maia, No. 830, Zona Rural, CEP 79106-550 Campo Grande, MS, Brazil; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brazil()
| | - Renato Andreotti
- Embrapa Gado de Corte, Av. Rádio Maia, No. 830, Zona Rural, CEP 79106-550 Campo Grande, MS, Brazil
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Cunha RC, Francisco JC, Cardoso MA, Matos LF, Lino D, Simeoni RB, Pereira G, Irioda AC, Simeoni PRB, Guarita-Souza LC, Carvalho KAT. Effect of platelet-rich plasma therapy associated with exercise training in musculoskeletal healing in rats. Transplant Proc 2015; 46:1879-81. [PMID: 25131059 DOI: 10.1016/j.transproceed.2014.05.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Muscle healing is a time-dependent process associated with an increase in the total amount of local collagen fibers. Platelet-rich plasma therapy (PRPT) associated with exercise may improve this healing process. The aim of this study was to demonstrate the regenerative effect of PRPT in association with exercise training on musculoskeletal healing. METHODS Male Wistar rats were submitted to an injury in the vastus lateralis muscle and randomly divided into 4 groups (n = 5/group): sedentary sham-operated (SSO); sedentary group submitted to PRPT (SPR); swim-trained (SWT); and swim-trained group submitted to PRPT (SWP). Serum lactate level was used to confirm the training protocol effectiveness to increase aerobic fitness. The collagen fiber concentration was measured by the polarization colors in picrosirius red-stained tissue sections. RESULTS Lactate levels decreased in both training groups (SWT and SWP; P < .05) after training (SWT: from 6.2 ± 0.44 to 4.7 ± 0.22 mmol/L; SWP: from 5.5 ± 0.99 to 4.0 ± 0.78 mmol/L). There were less type 1 collagen fibers in SWP group compared with other groups (SSO = 31.8 ± 10.3, SSP = 32.3 ± 13.5, SWT = 14.6 ± 13.4, SWP = 5.7 ± 4.7, P < .05), while there were more type 3 collagen fibers on SWP (SSO = 68.7 ± 9.8, SSP = 71.2 ± 12.2, SWT = 85.4 ± 13.4, SWP = 94.4 ± 4.6, P < .05) in the injured region. CONCLUSION Exercise in association with PRPT enhances the skeletal muscle-healing process.
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Affiliation(s)
- R C Cunha
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, Paraná, Brazil; Universidade Positivo, Curitiba, Paraná, Brazil; Universidade Tecnológica Federal do Paraná, Curitiba, Paraná.
| | - J C Francisco
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, Paraná, Brazil; Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, Brazil; Universidade Tecnológica Federal do Paraná, Curitiba, Paraná
| | - M A Cardoso
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - L F Matos
- Universidade Positivo, Curitiba, Paraná, Brazil
| | - D Lino
- Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, Brazil
| | - R B Simeoni
- Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, Brazil
| | - G Pereira
- Universidade Positivo, Curitiba, Paraná, Brazil; Universidade Federal do Paraná, Curitiba, Paraná, Brazil
| | - A C Irioda
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - P R B Simeoni
- Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, Brazil
| | - L C Guarita-Souza
- Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, Brazil
| | - K A T Carvalho
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, Paraná, Brazil
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Oliveira RSD, Cunha RC, Moraes-Filho J, Gonçales RA, Lara APDSSD, Avila LFDCD, Labruna MB, Leite FPL. Recombinant gp19 as a potential antigen for detecting anti-Ehrlichia canis antibodies in dog sera. Rev Bras Parasitol Vet 2015; 24:290-7. [PMID: 26291145 DOI: 10.1590/s1984-29612015055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The canine monocytic ehrlichiosis, caused by Ehrlichia canis, is endemic in several regions of Brazil. Some serological diagnostic techniques using immunodominant proteins of E. canis as antigens are available, but their specificities and sensitivities are questionable. Based on this, the objective of this study was to test the antigenic potential of the recombinant gp19 protein (rGP19) for subsequent use in diagnostic tests. The rGP19 expressed in the Escherichia coli strain BL21 (DE3) C41 was recognized in the sera from experimentally infected dogs using ELISA and Western blotting. Thus, it was possible to obtain a promising antigen with the ability to differentiate between E. canis-positive and -negative animals, even 1 week after infection.
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Affiliation(s)
| | | | - Jonas Moraes-Filho
- Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, BR
| | - Relber Aguiar Gonçales
- Pós-graduação em Biologia Celular e Molecular, Universidade de São Paulo, São Paulo, SP, BR
| | | | | | - Marcelo Bahia Labruna
- Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, BR
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Cominetti MC, Csordas BG, Cunha RC, Andreotti R. Geographical distribution of Trypanosoma cruzi in triatomine vectors in the State of Mato Grosso do Sul, Brazil. Rev Soc Bras Med Trop 2014; 47:747-55. [DOI: 10.1590/0037-8682-0234-2014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 11/24/2014] [Indexed: 11/21/2022] Open
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Matias J, Garcia MV, Cunha RC, Aguirre ADAR, Barros JC, Csordas BG, Andreotti R. Spotted fever group Rickettsia in Amblyomma dubitatum tick from the urban area of Campo Grande, Mato Grosso do Sul, Brazil. Ticks Tick Borne Dis 2014; 6:107-10. [PMID: 25454606 DOI: 10.1016/j.ttbdis.2014.10.001] [Citation(s) in RCA: 13] [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: 06/11/2014] [Revised: 10/06/2014] [Accepted: 10/13/2014] [Indexed: 11/16/2022]
Abstract
Rickettsia infection of each tick was evaluated by the hemolymph test and polymerase chain reaction (PCR) targeting gltA and ompA genes. All hemolymph tests were negative and PCR of one A. dubitatum detected both Rickettsia genes. Sequence of ompA exhibited a 99% identity with Rickettsia parkeri and R. africae and a 98% identity with R. sibirica. Rickettsia of the spotted fever group in A. dubitatum is described for the first time in an urban area within the municipality of Campo Grande in the state of Mato Grosso do Sul (MS), Brazil. This finding reinforces the importance of more detailed studies to determine the role of A. dubitatum in the transmission of spotted fever agents.
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Affiliation(s)
- Jaqueline Matias
- Programa de Pós-graduação em Doenças Infecciosas e Parasitárias, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
| | | | - Rodrigo Casquero Cunha
- Programa de Pós-Graduação em Biotecnologia, Universidade Federal de Pelotas, Bolsista PNPD/CAPES, Brazil
| | - André de Abreu Rangel Aguirre
- Programa de Pós-graduação em Doenças Infecciosas e Parasitárias, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
| | | | - Bárbara Guimarães Csordas
- Programa de Pós-graduação em Doenças Infecciosas e Parasitárias, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Renato Andreotti
- Embrapa Beef Cattle, Av. Radio Maia 830, Vila Popular, Campo Grande, MS, Brazil.
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25
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Cunha RC, Andreotti R, Garcia MV, Aguirre ADAR, Leitão A. Calculation of the efficacy of vaccines against tick infestations on cattle. Rev Bras Parasitol Vet 2013; 22:571-8. [DOI: 10.1590/s1984-29612013000400019] [Citation(s) in RCA: 8] [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: 07/09/2013] [Accepted: 09/02/2013] [Indexed: 12/13/2022]
Abstract
Cattle ticks are responsible for great economic losses in cattle farming worldwide, and their main control method, chemicals, has been showing problems, whether resulting from the development of resistant strains of ticks or environmental contamination. Research studies directed toward developing vaccines against ticks are emerging. One way to evaluate those vaccines is to calculate the percentage of efficacy. The aim of this study was to analyze scientific publications archived in PubMed that used this method of assessment and discuss the main factors that may affect its calculation. Thus, 25 articles addressing this subject were selected. The percentage of efficacy was usually calculated in one of two ways, with one considering the reduced fertility of eggs and the other not. The latter method may underestimate the vaccine efficacy, and the most complete formula for calculating the efficacy reflects how much the vaccine actually affects the infestation. In our view, the use of the complete formula for calculating the percentage of efficacy is broader and more representative of the vaccine effect on the tick population.
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Andreotti R, Garcia MV, Cunha RC, Barros JC. Protective action of Tagetes minuta (Asteraceae) essential oil in the control of Rhipicephalus microplus (Canestrini, 1887) (Acari: Ixodidae) in a cattle pen trial. Vet Parasitol 2013; 197:341-5. [DOI: 10.1016/j.vetpar.2013.04.045] [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: 09/28/2012] [Revised: 04/25/2013] [Accepted: 04/30/2013] [Indexed: 11/28/2022]
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de Almeida RFC, Garcia MV, Cunha RC, Matias J, e Silva EA, de Fatima Cepa Matos M, Andreotti R. Ixodid fauna and zoonotic agents in ticks from dogs: first report of Rickettsia rickettsii in Rhipicephalus sanguineus in the state of Mato Grosso do Sul, mid-western Brazil. Exp Appl Acarol 2013; 60:63-72. [PMID: 23229491 DOI: 10.1007/s10493-012-9641-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 11/29/2012] [Indexed: 06/01/2023]
Abstract
Ticks from 148 dogs from the urban area of the municipality of Campo Grande, state of Mato Grosso do Sul, Brazil, were collected, classified and analyzed using polymerase chain reaction (PCR) for the identification of Rickettsia spp., Trypanosoma cruzi and Leishmania spp. A total of 2015 ticks were collected. The species Rhipicephalus sanguineus (98.9 %) and Amblyomma cajennense (1.1 %) were identified. Molecular analysis revealed that no tick samples were infected by T. cruzi. Regarding Leishmania spp., tick samples from 36 dogs spread across all regions of the municipality were positive for L. chagasi. One tick sample was positive for Rickettsia spp. (gltA gene) in the PCR reaction. This sample was submitted to further PCR based on the ompA gene and the amplicon was sequenced. Identity of 100 % was found with homologous sequences of R. rickettsii available in GenBank. This paper is the first to report the natural infection of R. sanguineus by R. rickettsii in the municipality of Campo Grande, state of Mato Grosso do Sul, mid-western Brazil.
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Affiliation(s)
- Robson Ferreira Cavalcante de Almeida
- Programa de Pós-graduação em Doenças Infecciosas e Parasitárias, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
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Garcia MV, Silva DCD, Almeida RFCD, Cunha RC, Matias J, Barros JC, Andreotti R, Szabó MPJ. Environmentally associated ticks (Acari: Ixodidae) in Campo Grande, Mato Grosso do Sul, Brazil. Rev Bras Parasitol Vet 2013; 22:124-8. [DOI: 10.1590/s1984-29612013000100023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 02/19/2013] [Indexed: 11/21/2022]
Abstract
Herein, we report tick species found on wild and domestic animals and in the environment during a one-year sampling period at the Brazilian Farming Research Company beef cattle unit (Embrapa Beef Cattle), which is located within the urban area of Campo Grande, Mato Grosso do Sul, Brazil. From 55 wild hosts including six different species (Nasua nasua, Cebus spp., Cerdocyon thous,Myrmecophaga tridactyla, Tamandua tetradactyla and Dasyprocta aguti), 323 ticks were collected. Amblyomma ovale ticks were found solely on coatis, and Amblyomma nodosum was identified solely on anteaters. No ticks were found on capuchin monkeys. However, Amblyomma cajennense was found on all parasitized host species with the exception of capuchin monkeys. Giant anteaters displayed the highest infestation abundance, with a mean of 53 ticks∕animal. Environmental sampling yielded 166 adult A. cajennense ticks. The tick species found on domestic animals (Rhipicephalus(Boophilus) microplus,R. sanguineus, Dermacentor nitens andA. cajennense) were those typically found on these hosts in Brazil. The most prevalent tick species, A. cajennense, was found on both wild and domestic animals and was also prevalent in the environment. Thus, this tick species is the primary vector that allows pathogens to bridge wild and domestic animals in the Cerrado.
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Cunha RC, Andreotti R, Silva E, Pereira E, Sato T, Thomaz-Soccol V. LABORATORY DIAGNOSIS AND CLINICAL SIGNS OF CANINE VISCERAL LEISHMANIASIS IN DOGS EXAMINED AT THE CENTER FOR ZOONOSIS CONTROL IN CAMPO GRANDE – MS, BRAZIL. AVS 2012. [DOI: 10.5380/avs.v17i4.24951] [Citation(s) in RCA: 1] [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: 11/09/2022] Open
Abstract
Visceral leishmaniasis is a type of zoonosis caused by several Leishmania species endemic to tropical, subtropical, and Mediterranean climate regions. Dogs are the primary source of infection in urban areas and can be symptomatic or asymptomatic. This study focused on the observation of clinical signs of leishmaniasis in dogs in Campo Grande, Mato Grosso do Sul, Brazil. Samples from affected animals were analyzed using indirect fluorescent antibody (IFA) tests, an enzyme-linked immunosorbent assay (ELISA), and polymerase chain reaction (PCR) assays to determine the optimal diagnostic tool for use on animals that present clinical symptoms. A predominance of clinical symptoms affecting the integumentary system was observed, and splenomegaly and hepatomegaly were the most important pathological signs. Among the diagnostic tests, the greatest agreement was seen between ELISA and IFA, followed by ELISA and PCR, and finally IFA and PCR. PCR diagnostic results showed the greatest extent of correlation with clinical signs, followed by ELISA and then IFA. When choosing a diagnostic method, veterinarians should consider the clinical signs and health status of the patient.
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Cunha RC, Pérez de León AA, Leite FPL, Pinto LDS, Santos Júnior AGD, Andreotti R. Bovine immunoprotection against Rhipicephalus (Boophilus) microplus with recombinant Bm86-Campo Grande antigen. Rev Bras Parasitol Vet 2012; 21:254-62. [DOI: 10.1590/s1984-29612012000300014] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Accepted: 03/14/2012] [Indexed: 11/22/2022]
Abstract
The southern cattle fever tick, Rhipicephalus (Boophilus) microplus, is no doubt the most economically important ectoparasite of cattle globally. The inappropriate use of chemical acaricides has driven the evolution of resistance in populations of R. (B.) microplus. Anti-tick vaccines represent a technology that can be combined with acaricides in integrated control programs to mitigate the impact of R. (B.) microplus. The recombinant form of Bm86 antigen from the Campo Grande (rBm86-CG) strain of R. (B.) microplus was produced using the Pichiapastoris expression system to test its ability to immunoprotect cattle against tick infestation. Secretion of rBm86-CG by P. pastoris through the bioprocess reported here simplified purification of the antigen. A specific humoral immune response was detected by ELISA in vaccinated cattle. Immunoblot results revealed that polyclonal antibodies from vaccinated cattle recognized a protein in larval extracts with a molecular weight corresponding to Bm86. The rBm86-CG antigen showed 31% efficacy against the Campo Grande strain of R. (B.) microplus infesting vaccinated cattle. The rBm86-CG is an antigen that could be used in a polyvalent vaccine as part of an integrated program for the control of R. (B.) microplus in the region that includes Mato Grosso do Sul.
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Cunha RC, Andreotti R, Leite FPL. Rhipicephalus (Boophilus) microplus: expression and characterization of Bm86-CG in Pichia pastoris. ACTA ACUST UNITED AC 2011; 20:103-10. [PMID: 21722483 DOI: 10.1590/s1984-29612011000200003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Accepted: 12/14/2010] [Indexed: 11/21/2022]
Abstract
The cattle tick Rhipicephalus (Boophilus) microplus is responsible for great economic losses. It is mainly controlled chemically, with limitations regarding development of resistance to the chemicals. Vaccines may help control this parasite, thereby reducing tick pesticide use. In this light, we performed subcloning of the gene of the protein Bm86-GC, the homologue protein that currently forms the basis of vaccines (Gavac(TM) and TickGard(PLUS)) that have been developed against cattle ticks. The subcloning was done in the pPIC9 expression vector, for transformation in the yeast Pichia pastoris. This protein was characterized by expression of the recombinant Mut+ strain, which expressed greater quantities of protein. The expressed protein (rBm86-CG) was recognized in the Western-blot assay using anti-Gavac, anti-TickGard, anti-larval extract and anti-rBm86-CG polyclonal sera. The serum produced in cattle vaccinated with the antigen CG rBm86 presented high antibody titers and recognized the native protein. The rBm86-GC has potential relevance as an immunogen for vaccine formulation against cattle ticks.
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Andreotti R, Barros JC, Pereira AR, Oshiro LM, Cunha RC, Figueiredo Neto LF. Association between seropositivity for Neospora caninum and reproductive performance of beef heifers in the Pantanal of Mato Grosso do Sul, Brazil. Rev Bras Parasitol Vet (Online) 2010. [DOI: 10.1590/s1984-29612010000200010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Andreotti R, Barros JC, Pereira AR, Oshiro LM, Cunha RC, Figueiredo Neto LF. Association between seropositivity for Neospora caninum and reproductive performance of beef heifers in the Pantanal of Mato Grosso do Sul, Brazil. Rev Bras Parasitol Vet 2010; 19:119-123. [PMID: 20624350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Accepted: 03/22/2010] [Indexed: 05/29/2023]
Abstract
Neospora caninum is an obligate intracellular parasite that can infect domestic and wild canids, ruminants, and horses. The purpose of this study was to evaluate the association between the presence of antibodies to N. caninum and reproductive loss in beef heifers in the South Pantanal region of Mato Grosso, Brazil. A total of 1098 heifers were evaluated from breeding to calving with regard to reproductive performance, and serology for neosporosis was assayed by indirect immunofluorescence reaction. The prevalence of N. caninum in cows that had failed to conceive was 22.13% higher than in those that had conceived (p > 0.0001), indicating a significant correlation between non-conception and presence of anti-N. caninum antibodies. The extraction rates for seropositive and seronegative heifers were 28.24 and 50.12%, respectively, with a statistically significant value (p > 0.0001) that showed a decrease of 44% in the extraction rate of seropositive animals. The results emphasize the importance of diagnosis for monitoring of neosporosis in primiparous cows, and indicators of seropositive females as a factor in strategies for culling the beef cattle herd.
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Affiliation(s)
- Renato Andreotti
- EMBRAPA-Gado de Corte, BR 262, Km 4, CP 154, CEP 79002-970, Campo Grande - MS, Brazil.
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