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| Castilla,Karina Salvagni; Ferreira,Claudete Serrano Astolfi; Moreno,Andrea Micke; Nunes,Iolanda Aparecida; Ferreira,Antônio José Piantino. |
| The distribution of virulence genes, sefC, pefA and spvC, was investigated in 110 Salmonella Enteritidis phage type 4 strains by polymerase chain reaction. Their influence in the caecal colonization and invasion of liver and spleen of one-day-old chickens was studied. Eight isolates were negative for the spvC gene, three for the pefA gene and one, for the sefC gene. These results allowed grouping the strains into four genotypes. Presence of these genes did not influence bacteria invasion in the liver and spleen of the chickens ten days after infection, although the presence of more than one fimbrial gene can be related to caecal colonization. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salmonella; Virulence genes; Colonization; Invasion. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000200007 |
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| Paço,Ronaldo S.; Leme,Ivani Lucia; Bottino,José Américo; Ferreira,Antônio José Piantino. |
| Lactobacillus spp. were identified in 100 broiler litter samples collected from different poultry-rearing regions in Brazil. Ten different Lactobacillus species were identified: L. plantarum, L.casei subsp. pesudoplantarum, L. delbrueckii subsp. delbrueckii, L. reuteri, L. murinus, L. agilis, L. delbrueckii subsp. lactis, L. salivarus subsp. salicinus, L. viridenscens and L. amylophilus. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactobacillus spp.; Broiler litter; Chicken. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000300010 |
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| Knöbl,Terezinha; Gomes,Tânia Aparecida Tardelli; Vieira,Mônica Aparecida Midolli; Ferreira,Fernando; Bottino,José Américo; Ferreira,Antônio José Piantino. |
| Three hundred and fifty strains of E. coli isolated from septicemic poultry from seven states of Brazil were examined for presence of nine adhesion-encoding genes, hemagglutination and adherence to chicken tracheal cells (in vitro). Analysis of the strains by colony hybridization tests demonstrated that 93.7% of the isolates were fim +, 17% pap+ and 5.7% were sfa+. The mannose sensitive fimbriae occur with similar frequency in APEC isolated from all Brazilians states, while significant differences among pap and sfa genes distributions were observed. The results showed that 0.85% and 0.28% of APEC were positive for genes that encoded enteroaggregative adhesins and EPEC adherence factor, respectively. None of APEC was positive for DA, afa, Bfp and Eae... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: APEC; Escherichia coli; Adhesins; Colibacillosis; Poultry. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000300033 |
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