llness caused by bacterium Salmonella typhi, S. paratyphi A, B, sometimes C and occasionally by S. typhimurium. The incidence of enteric fever has declined greatly with the provision of clean water and good sewage systems in Europe and the USA since the early 20th century, but the disease remains a serious publichealth problem in developing countries, including Bangladesh. Poor water supply and sanitation systems are responsible for its prevalence throughout the year, either sporadically or epidemically in Bangladesh1-3.
