Regional dissemination of Salmonella enterica serovar Enteritidis is season dependent.
OBJECTIVE
To carry out epidemiological typing of clinical isolates of Salmonella enterica serovar Enteritidis by pulsed-field gel electrophoresis (PFGE), random amplified polymorphic DNA (RAPD) and analysis of their antibiotic resistance.


METHODS
Over a 12-month period, 44 Salmonella Enteritidis isolates, recovered from 40 patients admitted to the University Hospital Center of Amiens, France and from three outpatients, were characterized by the analysis of phenotypic and genotypic traits and clinical data from medical reports.


RESULTS
Forty nontyphoidal salmonellosis episodes were diagnosed in hospitalized patients (34 episodes of gastroenteritis, two episodes of bacteremia not affecting other organs, one episodes of bacteremia plus urinary infection, one episodes of bacteremia plus gastroenteritis, one episodes of chronic colitis plus gastroenteritis and one episode of peritonitis), and three carriers were observed in outpatients. By means of PFGE, RAPD and antibiotic susceptibility patterns 44 isolates were subdivided into 16 clonally related groups. Two of them were predominantly implicated in the course of these infections, being responsible for two successive waves of infection, while the others were encountered sporadically.
Biendo
M
M
Laboratoire de Bactériologie et Hygiène, CHU Nord, Place V Pauchet, 80054 Amiens, Cédex 1, France. eb.framcois@chu-amiens.fr
Laurans
G
G
Thomas
D
D
Dechepy
O
O
Hamdad-Daoudi
F
F
Canarelli
B
B
Eb
F
F
D000293:Adolescent; D000328:Adult; D000368:Aged; D016470:Bacteremia / Q000453:epidemiology; D015373:Bacterial Typing Techniques; D002648:Child; D002675:Child, Preschool; D017931:DNA Primers; D004196:Disease Outbreaks; D004352:Drug Resistance, Microbial; D016521:Electrophoresis, Gel, Pulsed-Field / Q000379:methods; D005260:Female; D006760:Hospitalization; D006801:Humans; D008297:Male; D008826:Microbial Sensitivity Tests; D008875:Middle Aged; D010641:Phenotype; D019105:Random Amplified Polymorphic DNA Technique / Q000379:methods; D012480:Salmonella Infections / Q000453:epidemiology* / Q000382:microbiology; D012477:Salmonella enteritidis / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D012621:Seasons
D017931:DNA Primers