Typhoid
Typhoid is a bacterial illness spread by contaminated food and water. There are 17 million cases per year, with 600,000 deaths.
This bacterium lives only in people and contaminated food or drinking water. The more bacteria ingested, the sicker a person may get. Typhoid vaccines are available but are only about 80% effective and the immune system can be overwhelmed if ingested with a very large dose of typhoid.
Symptoms occur after about 2 weeks and gradually worsen after another 2 weeks. High fever, headaches, stomachache, anorexia, and constipation (and or diarrhea), coughing, and deafness can occur. Rose spots may develop on the trunk. Diarrhea usually occurs on the second week. In extreme cases, Meningitis and coma may occur.
Other complications include: increased bleeding, Pneumonia, deep vein thrombosis, joint pain, and bone infections. Mortality is about 10% in untreated cases and 1% in treated cases.
Diagnosis is with blood tests. Treatment includes fluids and antibiotics. After symptoms resolve, people should be reviewed to make sure they are not carriers.

Typhoid causes 600,000 deaths annually in developing countries. Presently there is emerging resistance to previously used antibiotics. Vaccination is recommended in the face of increasing drug resistances, increasing incidence, and a high cost benefit for the traveler, since illness will last 4-8 weeks (as compared with Cholera which will be over in 4-5 days). The vaccine may be given with Yellow Fever vaccine. Paratyphoid is a separate disease from typhoid in which the vaccine is not effective.
Typhoid requires a booster every 3 years for the injectable (vi type) vaccine. The Oral Ty21a vaccine, which is a live vaccine, is good for 7 years.
Paratyphoid
Is a mild disease related to Typhoid caused by similar bacteria. Symptoms include malaise, fever, headache, anorexia and cough. Sometimes bleeding, confusion and hearing loss occurs. It is acquired after eating contaminated food or water. The vaccination against Typhoid does not give protection, but ciprofloxacin (an antibiotic) is effective treatment.
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