Phylogeny of canine coronavirus (CCoV) from Brazilian dogs based on membrane protein partial sequences / Filogenia de Coronavírus canino (CCoV) de cães brasileiros com base em sequências parciais da proteína de membrana

Este artigo descreve a anteriormente desconhecida diversidade molecular de amostras brasileiras de Coronavírus canino (CCoV). Vinte e duas amostras foram submetidas à análise da sequência parcial do gene codificador da proteína de membrana, sendo 12 classificadas como CCoV Tipo II e 10 como CCoV Tipo I e uma possível sublinhagem tipicamente brasileira foi encontrada para o CCoV Tipo II.

Detection of Genetic characterization of Porcine circovirus 2 (PCV2) in Brazilian wildlife boars

A semi-intensive wildlife boars farm presented a clinical history of high mortality in 70 - 90 days-old pigs (> 50 %). Two 90 days-old animals with weight loss and wasting were necropsied and the samples tested for PCV2 by polymerase chain reaction (PCR). The genetic material of PCV2 was sequenced and classified into the PCV2a genotype together with PCV2 sequences obtained from samples of Poland, Brazil, Slovenia and Greece wild boars.

Detection of genetic characterization of Porcine circovirus 2 (PCV2) in Brazilian wildlife boars

A semi-intensive wildlife boars farm presented a clinical history of high mortality in 70 - 90 days-old pigs (> 50 %). Two 90 days-old animals with weight loss and wasting were necropsied and the samples tested for PCV2 by polymerase chain reaction (PCR). The genetic material of PCV2 was sequenced and classified into the PCV2a genotype together with PCV2 sequences obtained from samples of Poland, Brazil, Slovenia and Greece wild boars.

Identification of Porcine parvovirus from wild boars by partial sequencing of the VP-2 coding gene / Identificação de parvovírus suíno em javalis a partir do sequenciamento parcial do gene VP-2

Este estudo descreve a detecção e a identificação de DNA de parvovírus suíno (PVS) em amostras de órgãos de dois javalis, por PCR e sequenciamento direcionado ao gene VP-2. Pools de órgãos (baço, rins, fígado, linfonodos e tonsila) de três javalis adultos e assintomáticos de Paraguaçu Paulista, SP, criados com propósitos comerciais, foram submetidos à detecção de PVS, resultando em duas amostras positivas após reações de nested-PCR direcionadas aos genes NS-1 e VP-2. Os fragmentos parciais de VP-2 foram sequenciados e comparados a sequências homólogas de cepas NADL-2 e Kresse, demonstrando identidade nucleotídica de 100%. Com relação a 29 cepas de PVS previamente isoladas no Brasil, o grau de identidade nucleotídica variou de 99 a 100% (uma a três substituições de nucleotídeos). Estes resultados demonstram, pela primeira vez, a detecção direta por PCR de parvovírus suíno em javalis, confirmada por análise de sequenciamento genético.

Detecção de ácidos nucléicos de Brucella spp., Leptospira spp., herpesvirus bovino e vírus da diarréia viral bovina, em fetos bovinos abortados e em animais mortos no perinatal / Detection of Brucella spp., Leptospira spp., bovine herpesvirus and bovine viral diarrhea virus nucleic acids in aborted fetuses and bovines dead perinatal

Samples of 114 bovine fetuses and 10 calves, which dead in perinatal period, were examined for detection of DNA. The most common detected agent was Brucella spp. in 17 samples (13.7 percent) followed by Leptospira spp. in 4 cases (3.2 percent),bovine herpesvirus (BHV) and bovine viral diarrhea (BVDV) in 3 animals (2.4 percent) each, and 1 for the association of BVDV and BHV. In 77.4 percent (96/124) of the samples it was not possible to detect any agent.

A heminested polymerase chain reaction for the detection of Brazilian rabies isolates from vampire bats and herbivores

A heminested-PCR (hn-PCR) using primers to the nucleoprotein-coding gene in a nested set was evaluated in the detection of Brazilian strains of rabies virus (RV). A representative number of RV nucleoprotein sequences belonging to genotype 1 were aligned. Based on such alignment, primers were directed to highly conserved regions. All 42 clinical samples positive by both fluorescent antibody and mouse inoculation tests were also positive by the hn-PCR. Brain tissue that had been left to decompose, obtained from an experimentally inoculated mouse was tested by hn-PCR and yielded positive results. In conclusion, primers designed here were capable of amplifying Brazilian RV isolates obtained from a rural epidemiological cycle

Detection of Leptospira spp. from pure cultures and from experimentally contaminated bovine semen by polymerase chain reaction

Due to the high importance of the venereal transmission of bovine leptospirosis, this study aimed to test the ability of PCR to detect Leptospira interrogans serovar hardjo DNA in experimentally contaminated bovine semen. Employing primers directed to the 16S rRNA gene, 10 bacteria/ml of semen could be detected by PCR. Results achieved in this work show that PCR can have a great potential to detect Leptospira spp. in insemination centers