|
|
|
|
|
| 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 |
| |
|
|
| Moreno,Luisa Zanolli; Castilla,Karina Salvagni; Gobbi,Débora Dirani Sena de; Coutinho,Tania Alen; Ferreira,Thais Sebastiana Porfida; Moreno,Andrea Micke. |
| Haemophilus parasuis infection, known as Glässer's disease, is characterized by fibrinous polyserositis, arthritis and meningitis in piglets. Although traditional diagnosis is based on herd history, clinical signs, bacterial isolation and serotyping, the molecular-based methods are alternatives for species-specific tests and epidemiologic study. The aim of this study was to characterize H. parasuis strains isolated from different states of Brazil by serotyping, PCR and ERIC-PCR. Serotyping revealed serovar 4 as the most prevalent (24 %), followed by serovars 14 (14 %), 5 (12 %), 13 (8 %) and 2 (2 %), whereas 40 % of the strains were considered as non-typeable. From 50 strains tested 43 (86%) were positive to Group 1 vtaA gene that have been related to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Haemophilus parasuis; Glässer disease; Genotyping; ERIC-PCR. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000400025 |
| |
|
|
|
