Carbon catabolic activity among Salmonella enterica serovar Typhi strains isolated from human blood, stool and sewage-contaminated water.

*Catabolism activity = No. of carbon sources utilized × mean of catabolism rate.†Catabolism activity between strains of blood origin and stool origin were significantly different at P-value of 0.013 (exclude the environmental strain VC1681) and 0.029 (include strain VC1681).