Melioidosis in Malaysia
1Tropical Infectious Diseases Research and Education Centre, Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia. puthu@um.edu.my
Abstract:
Melioidosis is an important cause of sepsis in the tropics, is caused by an environmental saprophyte--B. pseudomallei. It affects mainly adults with underlying predisposing condition such as diabetes. The range of symptoms varies from benign and localized abscesses, to severe community-acquired pneumonia to acute fulminating septicaemia with multiple abscesses often leading to death. B. pseudomallei is an intracellular pathogen and some of the virulence mechanisms that govern the complex interaction between the organism and the host have been elucidated. Isolation of B. pseudomallei from bodily fluids of patients remains the "gold standard" in diagnosis but a sensitive and specific serological test can lend support to the diagnosis of melioidosis. Ceftazidime is the treatment of choice for severe melioidosis, but the response is slow. Maintenance or eradication therapy for a prolonged period is necessary to prevent relapse and recurrence. Monitoring IgG antibody levels may be useful as a guideline to determine the duration of eradication therapy.
Insights
Melioidosis, a tropical sepsis cause from B. pseudomallei, presents diverse symptoms. Monitoring IgG antibody levels may guide treatment duration to prevent relapse.
Area of Science:
- Infectious Diseases
- Microbiology
- Tropical Medicine
Background:
- Melioidosis is a significant cause of sepsis in tropical regions, primarily affecting adults with underlying conditions like diabetes.
- The disease is caused by the environmental bacterium Burkholderia pseudomallei (B. pseudomallei), an intracellular pathogen.
- Clinical manifestations range from localized abscesses to severe pneumonia and fatal septicemia.
Purpose of the Study:
- To elucidate virulence mechanisms of B. pseudomallei.
- To highlight diagnostic approaches for melioidosis.
- To discuss treatment strategies and relapse prevention.
Main Methods:
- Bacterial isolation from patient bodily fluids as the gold standard for diagnosis.
- Development and application of sensitive and specific serological tests.
- Clinical observation of treatment responses and relapse rates.
Main Results:
- B. pseudomallei exhibits complex host-pathogen interactions and virulence mechanisms.
- Serological tests support the diagnosis of melioidosis.
- Ceftazidime is the primary treatment for severe cases, though response can be slow.
Conclusions:
- Prolonged eradication therapy is crucial to prevent melioidosis relapse and recurrence.
- Monitoring IgG antibody levels can serve as a guideline for determining the necessary duration of therapy.
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