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Journal of Clinical Microbiology, December 1999, p. 4012-4019, Vol. 37, No. 12
UPRES EA-1318,
Received 28 May 1999/Returned for modification 7 June 1999/Accepted 16 August 1999
Staphylococcus aureus was isolated as the predominant
or only isolate from cultures of stools of 60 patients over 2 years in
a university hospital, leading to the collection of 114 isolates. Diarrhea was observed in 90% of the patients. Ninety-eight percent of
the patients had received antibiotics in the month before the diarrhea.
Ninety-two percent of the S. aureus isolates were
methicillin resistant. S. aureus was encountered with
antibiotic-associated diarrhea among 47 quite elderly patients affected
or not affected by a gastrointestinal disease. Among the antimicrobial
treatments, cessation of the previous therapy when possible or rapid
application of oral vancomycin therapy was the most appropriate.
Analysis of total DNA by pulsed-field gel electrophoresis revealed 27 different SmaI pulsotypes distributed in 15 clusters. The
pulsotypes never differed for related isolates from a single patient,
even if they originated from patients with bacteremia. S. aureus was not isolated as the predominant isolate in cultures of
stools of 57 patients who received an antimicrobial treatment for more
than 5 days without diarrhea. Occurence of production of both
enterotoxin A and the bicomponent leucotoxin LukE-LukD by the S. aureus isolates was significantly different from that by random
isolates. The results strongly suggest that when predominant in stool
samples, S. aureus should be considered a possible
etiologic agent for some cases of antibiotic-associated diarrhea.
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Predominant Staphylococcus aureus
Isolated from Antibiotic-Associated Diarrhea Is Clinically Relevant and
Produces Enterotoxin A and the Bicomponent Toxin LukE-LukD
*
Corresponding author. Mailing address: UPRES EA-1318,
Institut de Bactériologie de la Faculté de Médecine
(Université Louis Pasteur-Hôpitaux Universitaires de
Strasbourg), 3 rue Koeberlé, F-67000 Strasbourg, France. Phone:
(33) 3 88 21 19 70. Fax: (33) 3 88 25 11 13. E-mail:
gilles.prevost{at}medecine.u-strasbg.fr.
Journal of Clinical Microbiology, December 1999, p. 4012-4019, Vol. 37, No. 12
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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