Widal test is one way to diagnose typhus. This examination is still widely carried out in Indonesia because it is practical, fast, easy, and inexpensive. Typhus is also known as typhus or typhoid fever. Of the 11-20 million typhus cases per year in the world, Indonesia along with other countries in Southeast Asia have the most typhus cases. This disease is characterized by fever accompanied by indigestion, such as constipation or diarrhea. The Widal Test Function for Typhus Diagnosis Typhus is caused by Salmonella bacterial infection. This bacterium can be found in foods that are not cooked well, or not processed hygienically. When Salmonella bacteria enter the human body, the body's defense system will respond by producing special antibody substances to fight Salmonella bacteria. A Widal test is performed to determine the amount of the antibody. An increase in the number of these antibodies can indicate typhus. How to Do and Read Widal Tests When symptoms are suspected as...