Abstract:
:The therapeutic alternatives available for use against ciprofloxacin-resistant enteric fever isolates in an endemic area are limited. The antibiotics currently available are the quinolones, third-generation cephalosporins and conventional first-line drugs. In this study, the MICs of various newer drugs were determined for 31 ciprofloxacin-resistant enteric fever isolates (26 Salmonella enterica serovar Typhi and 5 S. enterica serovar Paratyphi A). MICs for ciprofloxacin, ofloxacin, gatifloxacin, levofloxacin, cefotaxime, cefixime, cefepime and azithromycin were determined using Etest strips and the agar dilution method. By Etest, all of the ciprofloxacin-resistant isolates had ciprofloxacin MICs >/=32 mug ml(-1). S. Typhi showed MIC(90) values of 0.50, 0.25 and 0.38 mug ml(-1) for cefixime, cefotaxime and cefepime, respectively. For the cephalosporins, a negligible difference in MIC(90) and MIC(50) values for S. Typhi and S. Paratyphi A was observed. A single isolate of S. Typhi showed a high azithromycin MIC of 64 mug ml(-1). The MIC(90) value for azithromycin in S. Typhi and S. Paratyphi was 24 mug ml(-1). Gatifloxacin demonstrated lower resistance (80.8 %) compared with the other quinolones (92-100 %) in S. Typhi. The rise in MIC levels of these antimicrobials is a matter for serious concern.
journal_name
J Med Microbioljournal_title
Journal of medical microbiologyauthors
Capoor MR,Rawat D,Nair D,Hasan AS,Deb M,Aggarwal P,Pillai Pdoi
10.1099/jmm.0.47353-0subject
Has Abstractpub_date
2007-11-01 00:00:00pages
1490-1494issue
Pt 11eissn
0022-2615issn
1473-5644journal_volume
56pub_type
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