Data/hora: 11/06/2024 12:06:17

Provedor de dados: 	Brazilian Journal of Microbiology	
País: 	Brazil	
Título: 	Comparative analysis of agr groups and virulence genes among subclinical and clinical mastitis Staphylococcus aureus isolates from sheep flocks of the Northeast of Brazil	
Autores: 	Almeida,Lara M. de; Almeida,Mayra Zilta P.R.B. de; Mendonça,Carla L. de; Mamizuka,Elsa M.	
Data: 	2013-01-01	
Ano: 	2013	
Palavras-chave: 	Staphylococcus aureus; Agr groups; Virulence genes; Mastitis; Sheep flock.	
Resumo: 	Staphylococcus aureus is one of the most frequent mastitis causative agents in small ruminants. The expression of most virulence genes of S. aureus is controlled by an accessory gene regulator (agr)locus. This study aimed to ascertain the prevalence of the different agr groups and to evaluate the occurrence of encoding genes for cytotoxin, adhesins and toxins with superantigen activity in S. aureus isolates from milk of ewes with clinical and subclinical mastitis in sheep flocks raised for meat production The agr groups I and II were identified in both cases of clinical and subclinical mastitis. Neither the arg groups III and IV nor negative agr were found. The presence of cflA gene was identified in 100% of the isolates. The frequency of hla and lukE-D genes was high -77.3 and 82.8%, respectively and all isolates from clinical mastitis presented these genes. The sec gene, either associated to tst gene or not, was identified only in isolates from subclinical mastitis. None of the following genes were identified: bbp, ebpS, cna, fnbB, icaA, icaD, bap, hlg, lukM-lukF-PV and se-a-b-d-e.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000200026	
Editor: 	Sociedade Brasileira de Microbiologia	
Relação: 	10.1590/S1517-83822013000200026	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Microbiology  v.44 n.2 2013	
Fonte: 	info:eu-repo/semantics/openAccess