Typhoid fever is an infection that causes diarrhea and a rash. It is most commonly due to a type of bacterium called Salmonella typhi (S. typhi). S. typhi is spread through contaminated food, drink, or water. If you eat or drink something that is contaminated with the bacteria, the bacteria enter your body. In the year 2006, 36 cases of Typhoid fever were reported in Norway. The prevalence rate was 0.8%. Highest prevalence rate was reported in the 1999 that is 2.5%.
Several antibiotics are effective for the treatment of typhoid fever. Chloramphenicol was the original drug of choice for many years. Because of rare serious side effects, chloramphenicol has been replaced by other effective antibiotics. The choice of antibiotics is guided by identifying the geographic region where the infection was contracted (certain strains from South America show a significant resistance to some antibiotics.) Researches are focused on Phylogeographical analysis of the dominant multidrug-resistant H58 clade of Salmonella Typhi identifies inter- and intracontinental transmission events.