1,721,002 research outputs found
Caratterizzazione della caciotta caprina del Friuli Venezia Giulia di produzione artigianale
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Role of the Salmonella abortusovis virulence plasmid in the infection of BALB/c mice
No full textFollowing oral inoculation of BALB/c mice, Salmonella abortusovis strain SS44 was recovered in lower numbers from the Peyer's patches and mesenteric lymph nodes compared with S. typhimurium strain SL1344, whereas splenic infections were equivalent between the two serovars. SS44 was cured of its virulence plasmid or subjected to mutagenesis of the spv genes, and the Spv(-) derivatives were tested for virulence in mice. Plasmid-cured S. abortusovis SU40 retained virulence in BALB/c mice when inoculated intraperitoneally. On the other hand, mice infected orally with SU40 had greatly reduced splenic infection compared to those infected with wild-type SS44. Similar results were obtained after Tn5 insertion mutagenesis of the spvR gene or deletion of the sppABCD locus. These results suggest that in the gut-associated lymphoid tissues S. abortusovis may replicate less than S. typhimurium and that the S. abortusovis virulence plasmid primarily affects systemic infection after oral inoculation but not after intraperitoneal administration in the mouse model. (C) 2000 Published by Elsevier Science B.V. on behalf of the Federation of European Microbiological Societies
Identification of Salmonella abortusovis by PCR amplification of a serovar-specific IS200 element
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Phenotypic and Genotypic Characterisation of Antimicrobial Resistance to Aminoglycosides and Tetracycline in Bacterial Isolates Detected in Milk Samples from Sheep Dairy Farms.
No full textProfile and evolution of antimicrobial resistance of ovine mastitis pathogens (1995–2004)
No full textOutbreak of mastitis in sheep caused by multi-drug resistant Enterococcus faecalis in Sardinia, Italy
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