Results: 10

Antimicrobial resistance, diarrheagenic and avian pathogenic virulence genes in Escherichia coli from poultry feed and the ingredients

Diarrheagenic (DEC) and avian pathogenic Escherichia coli (APEC) are associated with intestinal and extra-intestinal infections (ExPEC), respectively. We aimed to analyze the antimicrobial susceptibility, gene encoding virulence factors associated to DEC and APEC, and phylogenetic classification in E. co...

Campylobacter jejuni and Campylobacter coli originated from chicken carcasses modulate their transcriptome to translate virulence genes in human cells

Pesqui. vet. bras; 39 (8), 2019
The aim was to determine the spread of genetically similar profiles of Campylobacter in chicken carcasses and evaluate their ability to produce transcripts for ciaB, dnaJ, p19 and sodB genes, before and after cultivation in Caco-2 cells. The strains used were isolated from 420 samples of chicken carcasse...

Phylogenetic and pathotypic characterization of newcastle disease virus in Tibetan chickens, China

Pesqui. vet. bras; 38 (1), 2018
Chickens are considered to be potential reservoirs of Newcastle disease virus (NDV). In this study, six Newcastle disease virus strains were isolated and characterized in Tibetan chickens. The HN gene was sequenced, and phylogenetic relationship to reference strains was studied. The phylogenetic analysis...

In-vivo evaluation of pathogenicity and antimicrobial profile susceptibility from Escherichia coli samples isolated from commercial layer hens

Arq. Inst. Biol; 85 (), 2018
Antimicrobial sensitivity and pathogenicity level of 90 strains of Escherichia coli isolated from livers and intestines from commercial layer hens presenting diarrhea were analyzed. To evaluate the antimicrobial susceptibility, all samples were subjected to antimicrobial susceptibility testing using 11 ...

Detection of enteric viruses in pancreas and spleen of broilers with runting-stunting syndrome (RSS)

Pesqui. vet. bras; 36 (7), 2016
Enteric disease is a multifactorial problem in chickens, which causes gastrointestinal alterations, elevated feed conversions and impairment. In the last years, several enteric viruses were implicated in enteric disease; case reports have shown their presence alone or in concomitant infections during out...

Clonagem e expressão do gene da glicoproteína S1 do vírus da bronquite infecciosa das galinhas em Pichia pastoris

Variações genética e antigênica são observadas com frequência elevada entre estirpes do VBIG e envolvem principalmente a glicoproteína S1. Com o objetivo de contribuir com a disponibilidade de ferramentas para o imunodiagnóstico e a imunoprofilaxia da bronquite infecciosa das galinhas foi desenvo...

Resposta imune conferida pelas amostras La Sota e VG/GA do vírus da doença de Newcastle
Immune response conferred by La Sota and VG/GA strains of the Newcastle Disease Virus

Estudou-se a resposta imune de aves infectadas experimentalmente com amostras lentogênicas do vírus da doença de Newcastle (VDN), incluindo uma amostra com tropismo para o sistema respiratório e outra com tropismo entérico. Foram utilizadas as vias ocular, nasal, água de bebida e aspersão para a i...

Estudos com reovírus isolado de galinha-d'Angola (Numida meleagridis)
Studies with reovirus isolated from guinea fowls (Numida meleagridis)

Este trabalho descreve algumas propriedades de um reovírus que foi isolado de pâncreas e intestino de galinhas d'Angola que padeciam de uma enterite transmissível. Coronavírus foi isolado do rim das mesmas aves. O reovírus de galinhas d'Angola é patogênico para embriöes de galinha d'Angola, de pa...

Viruses with tri-segmented double-stranded RNA in broiler chicken feces in Brazil

Eletroforese em gel de poliacrilamida de ácidos nucléicos extraídos de fezes de frangos de corte revelou a presença de três bandas em uma amostra. Essas bandas foram digeridas pela RNase A pancreática mas näo pela RNase T1 e DNase, sugerindo que devem ser constituídas de RNA fita dupla. Para exam...