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An exotic pulmonary infection in Thailand: melioidosis
1Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand. Kittichest@hotmail.com
Abstract:
Melioidosis is an infectious disease from Burkholderia pseudomallei and is confined in specific geographic areas such as Southeast Asia. Its highest prevalence in Thailand is in the north-eastern part. Most infected patients had worked paddy fields or had underlying diseases such as diabetes mellitus. Melioidosis can manifest clinically, with either disseminated or localized features. In the disseminated form patients developed an acute and progressive course with septicaemia. In contrast, patients with the localized form usually presented with prolonged fever, and symptoms of one or more organ involvement, in particular the lung and the liver. Definite diagnosis of melioidosis is made by an isolation of Burkholderia pseudomallei from a variety of clinical specimens. Treatment of choice for the septicaemic patients is an initial combination of ceftrazidime and trimethoprime-sulfamethoxazole, followed by trimethoprime-sulfamethoxazole for up to 6-12 months depending on the result of clinical specimen culture. Treatment for the localized form requires simultaneous antibiotic therapy and surgical drainage. However, optimum duration of antibiotic therapy remains unknown so further research is required. Melioidosis is an important disease in terms of mortality rate and it requires rapid diagnosis and treatment. To prevent recurrence, it is necessary to continue oral doxycycline or trimethoprime-sulfamethoxazole for 6-12 months.
Insights
Melioidosis, caused by Burkholderia pseudomallei, is prevalent in Southeast Asia, particularly Thailand. Prompt diagnosis and treatment, including specific antibiotic regimens and surgical drainage for localized forms, are crucial for managing this potentially fatal infectious disease.
Area of Science:
- Infectious Diseases
- Microbiology
- Epidemiology
Background:
- Melioidosis is an infectious disease caused by Burkholderia pseudomallei, endemic in Southeast Asia, with high prevalence in northeastern Thailand.
- Risk factors include occupational exposure in paddy fields and underlying conditions like diabetes mellitus.
- The disease presents in disseminated (acute septicaemia) or localized forms (prolonged fever, organ involvement).
Discussion:
- Definitive diagnosis relies on isolating Burkholderia pseudomallei from clinical specimens.
- Treatment for septicaemic melioidosis involves initial ceftazidime and trimethoprim-sulfamethoxazole, followed by prolonged oral trimethoprim-sulfamethoxazole.
- Localized melioidosis requires combined antibiotic therapy and surgical drainage; optimal antibiotic duration needs further research.
Key Insights:
- Melioidosis poses a significant mortality risk, necessitating rapid diagnosis and intervention.
- Effective treatment strategies are critical for patient outcomes.
- Preventing recurrence involves extended oral antibiotic prophylaxis.
Outlook:
- Further research is essential to determine the optimal duration of antibiotic therapy for localized melioidosis.
- Continued surveillance and public health initiatives are needed in endemic regions.
- Understanding transmission dynamics can aid in prevention efforts.