Finally, it misses low-sensitivity responses because it cannot detect allergic disease at sensitivities less than the concentration of the antigen placed. The treatment of allergic rhinitis with immunotherapy: A review of 1,000 cases
Definition. Typhoid fever is caused by Salmonella typhi bacteria. Typhoid fever is rare in industrialized countries. However, it remains a serious health threat in the developing world, especially for children.efinition. Typhoid fever is caused by Salmonella typhi bacteria. Typhoid fever is rare in industrialized countries. However, it remains a serious health threat in the developing world, especially for children.
Typhoid fever is a contagious bacterial infection that involves the intestine and lymphatic system. Rare in the United States, typhoid fever is common in developing countries, especially in areas with poor sanitation.Symptoms develop gradually over three weeks; fever, chills and headache occur first. Typhoid is caused by Salmonella typhi, a bacterium that invades the wall of the small intestine. 2  Typhoid fever is spread by water and food contaminated with the fecal matter of an infected person.