Objective To understand non-
typhoid Salmonella in
diarrhea patients from Guangdong province in order to timely discover the
outbreaks caused by them as well as to
grasp the
serotypes,
antibiotic resistance and
pulse-field gel
electrophoresis (PFGE) types of those
strains isolated from this
surveillance program.
Methods Salmonella strains from
diarrhea patients were detected and all the positive
strains were tested by
serum agglutination,
antibiotic susceptibility and PFGE. Results 71 nontyphoid
Salmonella strains were isolated from 1128 stoop samples, with a positive rate of 6.29 %. All the
strains were divided into 29
serotypes, with
Salmonella serotype enteritidis and typhimurium showing the most common
serotypes. Most of the
strains were sensitive to
cephalosporins and
quinolones. The
antibiotic resistance rates of S. typhimurium were higher than S. enteritidis and S. stanley. Other than S. enteritidis, all the
serotype strains did not have the same type of PFGE. 17 S. enteritidis
strains digested by Xba Ⅰ were divided to 8 PFGE types while the PFGE 4 type appeared the most common one. 12 S. enteritidis
strains were typed again by Sfi Ⅰ and Not Ⅰ , and there were still 3 groups of
strains showing the same PFGE pattern. Conclusion Most of the
infection caused by non-typhoidal
Salmonella was sporadic in Guangdong province in 2007.
Cephalosporins and
quinolones seemed the best in curing the
infection of non-typhoidal
Salmonella at the clinics.