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Da Silva TR, Bomfim SRM, Cavalcanti FBP, Lopes WDZ, Utsonomiya YT, Cadioli FA. "Lysis and Concentration Technique" improves the parasitological diagnosis of Trypanosoma vivax. Vet Parasitol 2023; 323:110043. [PMID: 37826972 DOI: 10.1016/j.vetpar.2023.110043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 09/20/2023] [Accepted: 09/25/2023] [Indexed: 10/14/2023]
Abstract
The "Lysis and Concentration Technique" (LCTe) involves lysing red blood cells and concentrating parasites to increase the chances of visualization in low parasitemia and in scenarios of evaluators with less knowledge. The lysis of red blood cells reduced the time of diagnosis by 21 s, showing that the effect produced by the treatment is comparable to the effect of the experience in parasitological examination. In addition, the concentration of parasites was 39.18% higher for slides with high parasitemia and 131.03% for slides with low parasitemia in relation to the standard slide. LCTe proved to be inexpensive, with a total cost of approximately US$0.07 per slide made, which allows it to be easily implemented in most laboratories.
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Affiliation(s)
- Tayna Rosendo Da Silva
- São Paulo State University (Unesp), School of Agricultural and Veterinary Sciences, Veterinary Medicine Post-Graduation Program Jaboticabal, Via de Acesso Paulo Donato Castellane s/n, 14884-900 Jaboticabal, SP, Brazil
| | - Suely Regina Mogami Bomfim
- São Paulo State University (Unesp), School of Veterinary Medicine, Araçatuba, Rua Clóvis Pestana 793, 16050-470 Araçatuba, SP, Brazil
| | - Fernanda Beatriz Pereira Cavalcanti
- São Paulo State University (Unesp), School of Agricultural and Veterinary Sciences, Veterinary Medicine Post-Graduation Program Jaboticabal, Via de Acesso Paulo Donato Castellane s/n, 14884-900 Jaboticabal, SP, Brazil
| | - Welber Daniel Zanetti Lopes
- Universidade Federal de Goias, Institute of Tropical Pathology and Public Health, Bioscience and Technology Department, R. 235, s/n.º - Setor Leste Universitário, Goiania, GO, Brazil
| | - Yuri Tana Utsonomiya
- São Paulo State University (Unesp), School of Veterinary Medicine, Araçatuba, Rua Clóvis Pestana 793, 16050-470 Araçatuba, SP, Brazil
| | - Fabiano Antonio Cadioli
- São Paulo State University (Unesp), School of Agricultural and Veterinary Sciences, Veterinary Medicine Post-Graduation Program Jaboticabal, Via de Acesso Paulo Donato Castellane s/n, 14884-900 Jaboticabal, SP, Brazil; São Paulo State University (Unesp), School of Veterinary Medicine, Araçatuba, Rua Clóvis Pestana 793, 16050-470 Araçatuba, SP, Brazil.
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Couto LFM, Heller LM, Zapa DMB, de Moura MI, Costa GL, de Assis Cavalcante AS, Ribeiro NB, Bastos TSA, Ferreira LL, Soares VE, Lino de Souza GR, Cadioli FA, Lopes WDZ. Presence of Trypanosoma vivax DNA in cattle semen and reproductive tissues and related changes in sperm parameters. Vet Parasitol 2022; 309:109761. [PMID: 35843131 DOI: 10.1016/j.vetpar.2022.109761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/03/2022] [Accepted: 07/02/2022] [Indexed: 11/19/2022]
Abstract
The present work investigated the presence of Trypanosoma vivax in semen and reproductive tissues of experimentally infected cattle and evaluated changes in seminal parameters. Two groups of cattle were established: T01 - experimentally infected with T. vivax (n = 8) and T02 - not experimentally infected with T. vivax (n = 8). After infection, blood (every seven days until 182 days post-infection - DPI), semen (7, 14, 35, 56, 70, 120 and 182 DPI) and reproductive tissue (after euthanasia, 182 DPI) were collected to search for T. vivax using different techniques, including PCR, Woo and Brener. Seminal parameters, including turbulence, motility, concentration, and vigor, were also analyzed. Packed cell volume (PCV) of the animals was determined weekly and weight gain was calculated. The PCR revealed T. vivax DNA in 7/56 semen samples of post-infection T01 cattle. Trypanosoma vivax DNA was detected in the semen of 5/8 animals at 7, 14, 56, 70 and 120 DPI, in the testis of four, and in the epididymis and fat located around the testis of two others. Trypomastigote forms of T. vivax were not found in any semen sample. Sperm of T01 cattle had lower turbulence (p ≤ 0.05) at 7, 14, 35, 56, 120 and 182 DPI, lower vigor (p ≤ 0.05) at 120 DPI and more sperm abnormalities (p ≤ 0.05) than T02. Digital dermatitis was observed among T01 cattle. Animals of T01 had lower PCV values than did those of T02 for most of the evaluations performed and T02 animals gained more weight during the experiment. The results highlight the presence of T. vivax DNA in semen of infected cattle and the importance of this disease for male breeding cattle. Further research is needed to determine whether T. vivax can be sexually transmitted in cattle.
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Affiliation(s)
| | - Luciana Maffini Heller
- Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | | | - Maria Ivete de Moura
- Professor Assistente. Pontifícia Universidade Católica Universidade Católica de Goiás Goiânia, Goiás, Brazil
| | - Gustavo Lage Costa
- Professor Assistente. Pontifícia Universidade Católica Universidade Católica de Goiás Goiânia, Goiás, Brazil
| | | | - Nathalia Braz Ribeiro
- Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | | | - Lorena Lopes Ferreira
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | | | - Fabiano Antônio Cadioli
- Departamento de Clínica, Cirurgia e Reprodução Animal, Faculdade de Medicina Veterinária, Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Welber Daniel Zanetti Lopes
- Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil; Departamento de Biociências e Tecnologia, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
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