Change In Drug Resistance And Phage Types Of Salmonella Typhi In 1991-92 In Rohtak.

A fall in the incidence of drug resistant S.typhi was observer in 1992, through MIC levels did not decline. Phage type EI remained the dominant type in 1991 and 1992. However, phage type A was observed more frequently in 1992 in relation to 1991. Some rare phage types like MLI, M4 and 42 appeared in 1991 while others like 40,41 and 46 were seen in 1992. The dominant resistance pattern was A C Co T. Hospitalized patients had more incidences of drug resistant isolates in both the years, though a slight decline was observed in 1992.