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Coelho F, Maia M, Luppi M, Costa E, Luiz A, Ribeiro N, Bomfim M, Fonseca F, Resende M. Ocorrência do vírus da leucemia felina em Felis cattus em Belo Horizonte. ARQ BRAS MED VET ZOO 2011. [DOI: 10.1590/s0102-09352011000300037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Ferreira C, Costa E, França S, Melo UD, Drumond B, Bomfim M, Coelho F, Resende M, Palhares M, Santos R. Equine coital exanthema in a stallion. ARQ BRAS MED VET ZOO 2010. [DOI: 10.1590/s0102-09352010000600035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Guimaraes A, Brandão P, Moraes W, Kiihl S, Santos L, Filoni C, Cubas Z, Robes R, Marques L, Neto R, Yamaguti M, Oliveira R, Catão-Dias J, Richtzenhain L, Messick J, Biondo A, Timenetsky J. Detection of Bartonella spp. in neotropical felids and evaluation of risk factors and hematological abnormalities associated with infection. Vet Microbiol 2010; 142:346-51. [DOI: 10.1016/j.vetmic.2009.10.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Revised: 10/01/2009] [Accepted: 10/02/2009] [Indexed: 10/20/2022]
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Costa ÉA, Bastianetto E, Vasconcelos AC, Bomfim MRQ, Fonseca FGD, Gomes AD, Leite RC, Resende M. An outbreak of malignant catarrhal fever in Murrah buffaloes in Minas Gerais, Brazil. PESQUISA VETERINARIA BRASILEIRA 2009. [DOI: 10.1590/s0100-736x2009000500006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An outbreak of Malignant Catarrhal Fever (MCF) resulted in death of five female buffaloes and one domestic cow from the same farm. Four buffaloes died 10-15 days after the appearance of clinical signs, while the fifth was euthanized in extremis, after similar clinical signs. Histopathological lesions included multifocal histiolymphocytic epicarditis, myocarditis and lymphocytic interstitial pneumonia, which are commonly seen in cases of MCF in buffaloes. Furthermore, lymphocytic vasculitis centered in the adventitia, with occasional fibrinoid necrosis in the muscular layer, was found in the kidneys, liver, spleen, lymph nodes and brain. Nucleotide sequencing of DNA fragments from the central nervous system amplified by PCR revealed 98% similarity with known OHV-2 sequences from Genbank. Additionally, PCR analysis also revealed the presence of OHV-2 DNA in the peripheral mononuclear blood cells of two clinically healthy buffaloes. The diagnosis of MCFwas based on epidemiological, clinical, gross and histopathological findings and on the results of a semi-nested PCR followed by nucleotide sequencing.
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Coelho FM, Bomfim MRQ, de Andrade Caxito F, Ribeiro NA, Luppi MM, Costa ÉA, Oliveira ME, Da Fonseca FG, Resende M. Naturally occurring feline leukemia virus subgroup A and B infections in urban domestic cats. J Gen Virol 2009; 89:2799-2805. [PMID: 18931078 DOI: 10.1099/vir.0.2008/003855-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A nested-PCR (n-PCR) was used to detect feline leukemia virus (FeLV) proviral DNA in blood samples from 464 sick and 608 healthy domestic cats (Felis catus) selected by convenience, and a significantly high prevalence of FeLV infection was observed. n-PCR results revealed the presence of FeLV proviral DNA in 47.2 % of sick cats and 47.4 % of healthy cats. Phylogenetic analysis revealed that FeLV samples from healthy or sick cats were grouped into separate clades. We determined FeLV subgroups by an n-PCR based on the envelope (env) gene. The partial env gene of FeLV Minas Gerais (MG) samples were compared to various exogenous FeLV isolates and endogenous (enFeLV) provirus from the same region. FeLV-B MG samples were more similar to endogenous sequences and to natural FeLV-B isolates than to either FeLV-A or FeLV-C. The results revealed the circulation of FeLV-B in large populations of urban domestic cats in Brazil.
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Affiliation(s)
- Fabiana Magalhães Coelho
- Laboratório de Virologia Comparada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Maria Rosa Quaresma Bomfim
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Fabíola de Andrade Caxito
- Laboratório de Virologia Comparada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Natália Almeida Ribeiro
- Laboratório de Virologia Comparada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Marcela Miranda Luppi
- Laboratório de Virologia Comparada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Érica Azevedo Costa
- Laboratório de Virologia Comparada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Maria Emilia Oliveira
- Laboratório de Virologia Comparada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Flávio Guimarães Da Fonseca
- Laboratório de Virologia Comparada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Mauricio Resende
- Laboratório de Virologia Comparada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, CEP: 31270-901, Belo Horizonte, MG, Brazil
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Zhao X, Buehring GC. Natural genetic variations in bovine leukemia virus envelope gene: Possible effects of selection and escape. Virology 2007; 366:150-65. [PMID: 17498765 DOI: 10.1016/j.virol.2007.03.058] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2007] [Revised: 03/05/2007] [Accepted: 03/29/2007] [Indexed: 12/01/2022]
Abstract
Bovine leukemia virus (BLV) is an oncogenic virus widespread in cattle. It belongs to the genus Deltaretrovirus of the family Retroviridae along with human and simian T-lymphotropic viruses. Here we report the addition of 28 new sequences to the current literature of 16 full-length BLV envelope gene sequences. The phylogenetic clustering, genotyping, and geographic distribution of BLV env variations corresponded in most cases. Most natural variations are mapped to the surface of the proposed conformational models of BLV gp51 N-terminus and gp30 external domain, overlapping with or adjacent to immunogenic epitopes. Analyses for evidence of possible selection pressures suggest the BLV env is under stringent negative selection overall, while strong positive selection is indicated for immunogenic epitope G. Natural env deletions bounded by similar flanking sequences were observed in multiple isolates and would result in truncated signal peptides, missing gp51, and aberrant coding frames for other proteins.
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Affiliation(s)
- Xiangrong Zhao
- Graduate Program in Endocrinology, 3060 Valley Life Science Building, University of California, Berkeley, CA 94720-3140, USA.
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