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However, during this period we continued to isolate chloramphenicol sensitive (CS) <jats:italic>S. typhi<\/jats:italic> also. The relative prevalences showed that the frequency of CS variety was unaffected by the epidemic of MDR variety. This is an unusual epidemiological pattern, which indicates that there may have been factors which favoured the epidemic of the MDR variety but not the CS one.<\/jats:p>","DOI":"10.1017\/s095026880005247x","type":"journal-article","created":{"date-parts":[[2009,5,15]],"date-time":"2009-05-15T04:34:17Z","timestamp":1242362057000},"page":"225-227","update-policy":"http:\/\/dx.doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":11,"title":["The concurrent prevalence of chloramphenicol-sensitive and multidrug-resistant <i>Salmonella typhi<\/i> in Vellore, S. India"],"prefix":"10.1017","volume":"116","author":[{"given":"M. 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