Resposta imune após à infecção por Leishmania chagasi em camundongos Balb/c imunossuprimidos

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Inquérito soro-epidemiológico em acadêmicos de medicina veterinária de duas universidades do oeste do Paraná para a ocorrência de toxoplasmose e leptospirose

Pós-graduação em Medicina Veterinária - FMVZ

Atividade de acaricidas sobre o Ácaro-da-leprose, Brevipalpus phoenicis (Geijskes) (Acari: Tenuipalpidae) e sobre artrópodes benéficos na cultura dos citros

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ressonância magnética na avaliação das estruturas encefálicas do Alouattafusca (Bugio-Ruivo-Georffroy Saint-Hilaire, 1812)

Pós-graduação em Medicina Veterinária - FMVZ

Pesquisa de Brucella spp. em linfonodos de suínos e javalis com linfadenite

Pós-graduação em Medicina Veterinária - FMVZ

Avaliação do perfil de mutações e resistência aos inibidores de transcriptase reversa e protease em pacientes pediátricos infectados pleo HIV-1

Pós-graduação em Pesquisa e Desenvolvimento (Biotecnologia Médica) - FMB

Inibição do vírus da hepatite C utilizando siRNAs direcionados para o genoma viral e proteínas celulares Hsps

Pós-graduação em Microbiologia - IBILCE

Detecção e classificação molecular de Chlamydophila psittaci em amostras fecais de aves assintomáticas

Chlamydophila psittaci is a bacterium that causes respiratory or systemic disease in birds and humans. Owing to the risk of transmission from asymptomatic birds to humans, the objective of this study was to detect the presence of Chlamydophila spp. in asymptomatic birds. Four hundred and three fecal samples or cloacal swabs were collected from domestic, wild or exotic birds. The 403 samples were examined by real time PCR specific for the 16S subunit of rRNA gene using SsoFastEvaGreen®SupermixTM (Bio-Rad) and melting curve analysis. Hemi-nested PCR specific for the OMP-A gene, accomplished in real-time PCR positive samples, was followed by sequencing of the amplified fragments to determine the genotype of C. psittaci. Real-time PCR was positive in 17 (4.21%) samples. Hemi-nested PCR revealed positivity in two samples previously positive by real-time PCR. Sequencing of the fragment amplified by hemi-nested PCR allowed for the identification of genotype A of C. psittaci in one sample. The results of this experiment show that the real-time PCR targeting the 16S rRNA gene followed by melting curve analysis can be used for diagnosis of Chlamydophila sp. in fecal samples of asymptomatic birds. The classification of the Chlamydophila species and the genotype of C. psittaci must be accomplished by PCR targeting the ompA gene and sequencing of the amplified fragments.

Anatomopathological characterization of placentas from HIV+ patients associated with p24 expression

INTRODUCTION: The study of placentas from pregnant human immunodeficiency virus (HIV) positive women has become the subject of numerous studies in the literature. Morphological, viral, immune and inflammatory placental aspects have been analyzed in order to grasp the vertical transmission of the virus. OBJECTIVE: To identify the most frequent findings in the placentas by associating them with a viral antigen and correlating them with the infection of newborns. MATERIAL AND METHODS: Thirty-five placentas from HIV- positive pregnant women were pathologically and immunohistochemically analyzed with the use of p24 antibody in the period from 1992 to1997 in accordance with the routine laboratory testing from the Anatomopathological Department - Hospital Universitário Antônio Pedro - Universidade Federal Fluminense (APD/HUAP/UFF). RESULTS: The microscopic alterations detected in all cases, including those with vertical transmission, were arteriopathy in the fetal blood circulation, chorioamnionitis, perivillous fibrin deposition, syncytial knotting, villous edema and villous immaturity. No specific macroscopic or histopathological changes were found in these placentas. The neonatal infection was observed in five cases. Vertical transmission was identified in two out of five placentas that had low weight for the respective stage of pregnancy. Immunohistochemical analysis revealed 14 positive cases, two of which showed vertical transmission. The viral protein was not identified in 10 out of 14 placentas from patients who had been medicated with zidovudine (AZT). CONCLUSION: Our study has contributed to the anatomopathological investigation into placentas from HIV-positive patients, although p24 expression per se did not allow a definite and early diagnosis of the vertical transmission.

Identification of blood meal sources of Lutzomyia longipalpis using polymerase chain reaction-restriction fragment length polymorphism analysis of the cytochrome B gene

An analysis of the dietary content of haematophagous insects can provide important information about the transmission networks of certain zoonoses. The present study evaluated the potential of polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis of the mitochondrial cytochrome B (cytb) gene to differentiate between vertebrate species that were identified as possible sources of sandfly meals. The complete cytb gene sequences of 11 vertebrate species available in the National Center for Biotechnology Information database were digested with Aci I, Alu I, Hae III and Rsa I restriction enzymes in silico using Restriction Mapper software. The cytb gene fragment (358 bp) was amplified from tissue samples of vertebrate species and the dietary contents of sandflies and digested with restriction enzymes. Vertebrate species presented a restriction fragment profile that differed from that of other species, with the exception of Canis familiaris and Cerdocyon thous. The 358 bp fragment was identified in 76 sandflies. Of these, 10 were evaluated using the restriction enzymes and the food sources were predicted for four: Homo sapiens (1), Bos taurus (1) and Equus caballus (2). Thus, the PCR-RFLP technique could be a potential method for identifying the food sources of arthropods. However, some points must be clarified regarding the applicability of the method, such as the extent of DNA degradation through intestinal digestion, the potential for multiple sources of blood meals and the need for greater knowledge regarding intraspecific variations in mtDNA.

Solanum americanum: reservoir for Potato virus Y and Cucumber mosaic virus in sweet pepper crops

Weeds can act as important reservoirs for viruses. Solanum americanum (Black nightshade) is a common weed in Brazil and samples showing mosaic were collected from sweet pepper crops to verify the presence of viruses. One sample showed mixed infection between Cucumber mosaic virus (CMV) and Potato virus Y (PVY) and one sample showed simple infection by PVY. Both virus species were transmitted by plant extract and caused mosaic in tomato (Solanum lycopersicum cv. Santa Clara), sweet pepper (Capsicum annuum cv. Magda), Nicotiana benthamiana and N. tabaccum TNN, and local lesions on Chenopodium quinoa, C. murale and C. amaranticolor. The coat protein sequences for CMV and PVY found in S. americanum are phylogenetically more related to isolates from tomato. We conclude that S. americanum can act as a reservoir for different viruses during and between sweet pepper crop seasons.

Efeito da infecção pelo vírus da febre amarela no mecanismo de splicing celular

Pós-graduação em Microbiologia - IBILCE

Avaliação do desempenho de colírio usando soro alogênico e fatores de crescimento derivados de plaquetas em cultura de células do anel córneo-escleral

Pós-graduação em Pesquisa e Desenvolvimento (Biotecnologia Médica) - FMB

Análise da expressão das proteínas celulares p53, p16 e ciclina D1 em amostras de tumores penianos

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Derivados de poli(L-lisina) com fosforilcolina para transferência gênica não-viral

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)