Journal of Clinical Microbiology, March 1998, p. 674-678, Vol. 36, No. 3
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Departamento de Microbiología,
Received 7 August 1997/Returned for modification 7 November
1997/Accepted 5 December 1997
The objective of this study was the in vitro differentiation of
isolates of Salmonella enteritidis whose virulences
differed in a chick model. A total of 14 strains of S. enteritidis were isolated from either the environment, dairy
products, or infected patients. The isolates could be divided into two
groups on the basis of their virulence (50% lethal dose) in chickens
infected intraperitoneally. When the strains were incubated in
adherence test medium (Spanish patent 9700408), only the virulent
strains produced aggregates and formed visible filaments attached to
the glass tube. These results suggest, although for a limited number of
strains, that aggregation in such a medium could be used as a
diagnostic tool to discriminate virulent strains of S. enteritidis.
*
Corresponding author. Mailing address: Departamento de
Microbiología, Universidad de Navarra, Aptdo. 273, 31008 Pamplona, Spain. Phone: 3448 425600. Fax: 3448 425649. E-mail:
cgamazo{at}mail2.cti.unav.es.
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