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De Oliveira CHS, Barbosa JD, Damasceno KA, Cassali GD, Oliveira CM, Leite RC, Reis JKP. Multicentric lymphoma in buffaloes in the Amazon region, Brazil. BMC Vet Res 2016; 12:238. [PMID: 27765074 PMCID: PMC5072347 DOI: 10.1186/s12917-016-0845-y] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 07/11/2016] [Indexed: 11/15/2022] Open
Abstract
Background The presence of lymphoma in buffaloes was first reported in India in the 1960s. The disease is similar to Enzootic Bovine Leucosis (EBL) caused by Bovine leukemia virus (BLV) in cattle; however, according to our results and those of other studies, the etiology of these lymphomas in buffalo do not appear to be associated with BLV. The objectives of this study are to describe four cases of the disease in buffaloes belonging to the same herd in the Amazon region of Brazil and to perform a clinical-anatomopathological, immunohistochemical, and etiological study of the lymphomas. Results Over a period of ten years, four buffaloes were observed presenting progressive weight loss, swelling of peripheral lymph nodes, and nodules in the subcutaneous tissue. Upon necropsy, whitish-colored tumor masses were observed in the form of nodules in the subcutaneous tissue, along with miliary nodules on the serosal surfaces of abdominal and thoracic organs and tumors in lymph nodes and other organs. Neoplastic lymphocyte proliferation was observed through histopathology. An immunohistochemical study revealed that the neoplasias were formed by proliferation of predominantly B lymphocytes. The presence of BLV genome was not detected in the lymphomas when using the real-time PCR technique, nor was it detected through immunohistochemical staining using monoclonal antibodies against two viral proteins. Bovine herpesvirus 6 was not detected in the tumors. However, Bovine immunodeficiency virus (BIV) was detected in samples of lymphoma and in the lymph nodes and kidneys of one of the animals. Conclusions The occurrence of lymphoma in buffaloes is reported for the first time in Brazil and is characterized by B-cell multicentric lymphoma. The etiology of the disease does not appear to be associated with BLV; however, the detection of BIV in samples of lymphoma from one sick animal deserves further study, considering the oncogenic potential of this virus. Electronic supplementary material The online version of this article (doi:10.1186/s12917-016-0845-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Cairo H S De Oliveira
- Laboratório de Retroviroses, Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Belo Horizonte, Minas Gerais, Brazil.,Setor de Medicina Veterinária Preventiva, Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - José D Barbosa
- Hospital Veterinário de Grandes Animais, Instituto de Medicina Veterinária, Universidade Federal do Pará, Castanhal, Pará, Brazil
| | - Karine A Damasceno
- Laboratório de Patologia Comparada, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Geovanni D Cassali
- Laboratório de Patologia Comparada, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Carlos Mc Oliveira
- Hospital Veterinário de Grandes Animais, Instituto de Medicina Veterinária, Universidade Federal do Pará, Castanhal, Pará, Brazil
| | - Rômulo C Leite
- Laboratório de Retroviroses, Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Belo Horizonte, Minas Gerais, Brazil.,Hospital Veterinário de Grandes Animais, Instituto de Medicina Veterinária, Universidade Federal do Pará, Castanhal, Pará, Brazil
| | - Jenner K P Reis
- Laboratório de Retroviroses, Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Belo Horizonte, Minas Gerais, Brazil.
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De Oliveira CHS, Resende CF, Oliveira CMC, Barbosa JD, Fonseca AA, Leite RC, Reis JKP. Absence of Bovine leukemia virus (BLV) infection in buffaloes from Amazon and southeast region in Brazil. Prev Vet Med 2016; 129:9-12. [PMID: 27317318 DOI: 10.1016/j.prevetmed.2016.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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: 12/28/2015] [Revised: 05/02/2016] [Accepted: 05/03/2016] [Indexed: 11/28/2022]
Abstract
Enzootic bovine leucosis is an infectious disease caused by Bovine leukemia virus (BLV) and is well described in bovines. The majority of infected animals are asymptomatic, one to five percent develop lymphoma and from 30 to 50% present a persistent lymphocytosis. The virus occurs naturally in cattle and experimentally in buffaloes, capybaras and rabbits. The occurrence of lymphoma in buffaloes has been attributed to BLV infection by some authors in India and Venezuela, but not confirmed by other studies and little information on natural BLV infection in buffaloes is available. The aim of this study was to evaluate the occurrence of BLV in a sub-sample of buffalo from Amazon and southeast regions in Brazil. Three hundred and fifteen serum samples were negative using commercial AGID and ELISA (ELISA-gp51) which detect anti-BLV glycoprotein gp51 antibodies. The same samples were also evaluated for antibodies to whole virus through a commercial ELISA (ELISA-BLV) in which 77 (24.44%) were found seropositive and two (0.63%) inconclusive. On the other hand, all animals were negative by PCR to BLV targeted to the env and tax genes. These results suggest that ELISA-BLV produces false positive results in buffalo serum (p<0.001). In addition, one buffalo lymphoma sample was negative in both PCR assays used in this study. BLV was not detected in buffaloes from the Amazon basin and the southeast region of Brazil. Serological tests, like ELISA-BLV, usually used for cattle may produce false-positive results for BLV in buffaloes and direct detection tests such as PCR should be chosen in these surveys. The occurrence of lymphoma in buffalo was not associated with BLV infection in the one case analyzed in this work and the etiology and pathogenesis of this disease should be clarified.
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Affiliation(s)
- Cairo H S De Oliveira
- Laboratório de Retroviroses, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Setor de Medicina Veterinária Preventiva, Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
| | - Cláudia F Resende
- Laboratório de Retroviroses, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
| | - Carlos M C Oliveira
- Hospital Veterinário, Instituto de Medicina Veterinária, Universidade Federal do Pará, Castanhal, Pará, Brazil.
| | - José D Barbosa
- Hospital Veterinário, Instituto de Medicina Veterinária, Universidade Federal do Pará, Castanhal, Pará, Brazil.
| | - Antônio A Fonseca
- Ministério da Agricultura Pecuária e Abastecimento-LANAGRO, Pedro Leopoldo, Minas Gerais, Brazil.
| | - Rômulo C Leite
- Laboratório de Retroviroses, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Hospital Veterinário, Instituto de Medicina Veterinária, Universidade Federal do Pará, Castanhal, Pará, Brazil.
| | - Jenner K P Reis
- Laboratório de Retroviroses, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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