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Concept
Melioidosis
Summary
Melioidosis is an infectious disease caused by a gram-negative bacterium called Burkholderia pseudomallei. Most people exposed to B. pseudomallei experience no symptoms; however, those who do experience symptoms have signs and symptoms that range from mild, such as fever and skin changes, to severe with pneumonia, abscesses, and septic shock that could cause death. Approximately 10% of people with melioidosis develop symptoms that last longer than two months, termed "chronic melioidosis".
Humans are infected with B. pseudomallei by contact with contaminated soil or water. The bacteria enter the body through wounds, inhalation, or ingestion. Person-to-person or animal-to-human transmission is extremely rare. The infection is constantly present in Southeast Asia particularly in northeast Thailand and northern Australia. In temperate countries such as Europe and the United States, melioidosis cases are usually imported from countries where melioidosis is endemic. The signs and symptoms of melioidosis resemble tuberculosis and misdiagnosis is common. Diagnosis is usually confirmed by the growth of B. pseudomallei from an infected person's blood or other bodily fluid such as pus, sputum, and urine. Those with melioidosis are treated first with an "intensive phase" course of intravenous antibiotics (most commonly ceftazidime) followed by a several-month treatment course of co-trimoxazole. In countries with the advanced healthcare system, approximately 10% of people with melioidosis die from the disease. In less developed countries, the death rate could reach 40%.
Efforts to prevent melioidosis include: wearing protective gear while handling contaminated water or soil, practising hand hygiene, drinking boiled water, and avoiding direct contact with soil, water, or heavy rain. There is little evidence in supporting the use of melioidosis prophylaxis in humans. The antibiotic co-trimoxazole is used as a preventative only for individuals at high risk for getting the disease after being exposed to the bacteria in laboratory settings.
Official source
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