Christmas in Samas





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Immunization

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What is typhoid?

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Share on Pinterest Typhoid is an infection caused by Salmonella typhimurium bacteria that is spread from human to human. Typhoid is an infection caused by the bacterium  Salmonella typhimurium (S. typhi) . The bacterium lives in the intestines and bloodstream of humans. It spreads between individuals by direct contact with the feces of an infected person. No animals carry this disease, so transmission is always human to human. If untreated, around  1 in 5 cases  of typhoid can be fatal. With treatment, fewer than 4 in 100 cases are fatal. S. typhi  enters through the mouth and spends 1 to 3 weeks in the intestine. After this, it makes its way through the intestinal wall and into the bloodstream. From the bloodstream, it spreads into other tissues and organs. The immune system of the host can do little to fight back because  S. typhi  can live within the host's cells, safe from the  immune system Trusted Source . Typhoid is diagnosed...
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