Related Experiment Video
Updated: Dec 26, 2025
Simplified Whole Body Plethysmography to Characterize Lung Function During Respiratory Melioidosis
Published on: February 24, 2023
Human Melioidosis
I Gassiep1,2, M Armstrong1, R Norton3,2
1Pathology Queensland, Townsville Hospital, Townsville, Queensland, Australia.
Abstract:
The causative agent of melioidosis, Burkholderia pseudomallei, a tier 1 select agent, is endemic in Southeast Asia and northern Australia, with increased incidence associated with high levels of rainfall. Increasing reports of this condition have occurred worldwide, with estimates of up to 165,000 cases and 89,000 deaths per year. The ecological niche of the organism has yet to be clearly defined, although the organism is associated with soil and water. The culture of appropriate clinical material remains the mainstay of laboratory diagnosis. Identification is best done by phenotypic methods, although mass spectrometric methods have been described. Serology has a limited diagnostic role. Direct molecular and antigen detection methods have limited availability and sensitivity. Clinical presentations of melioidosis range from acute bacteremic pneumonia to disseminated visceral abscesses and localized infections. Transmission is by direct inoculation, inhalation, or ingestion. Risk factors for melioidosis include male sex, diabetes mellitus, alcohol abuse, and immunosuppression. The organism is well adapted to intracellular survival, with numerous virulence mechanisms. Immunity likely requires innate and adaptive responses. The principles of management of this condition are drainage and debridement of infected material and appropriate antimicrobial therapy. Global mortality rates vary between 9% and 70%. Research into vaccine development is ongoing.
Insights
Melioidosis, caused by Burkholderia pseudomallei, is a serious global health threat, particularly in Southeast Asia. Early diagnosis and treatment are crucial for managing this potentially fatal infection.
Area of Science:
- Infectious Diseases
- Microbiology
- Public Health
Background:
- Melioidosis is caused by Burkholderia pseudomallei, a select agent endemic in Southeast Asia and Australia.
- Global incidence is rising, with significant annual cases and deaths, often linked to rainfall patterns.
- The organism's ecological niche remains unclear, though associated with soil and water.
Purpose of the Study:
- To review the epidemiology, diagnosis, clinical presentation, transmission, risk factors, and management of melioidosis.
- To highlight the challenges and current status of diagnostic methods and treatment strategies.
- To underscore the need for ongoing research, including vaccine development.
Main Methods:
- Review of existing literature on Burkholderia pseudomallei and melioidosis.
- Analysis of diagnostic techniques, including culture, phenotypic, mass spectrometric, and molecular methods.
- Examination of clinical manifestations, transmission routes, and risk factors.
Main Results:
- Laboratory diagnosis relies on culturing clinical material, with phenotypic identification being standard.
- Molecular and antigen detection methods have limited availability and sensitivity.
- Clinical presentations vary widely, and mortality rates differ significantly globally.
Conclusions:
- Effective management involves surgical intervention (drainage/debridement) and antimicrobial therapy.
- Risk factors include male sex, diabetes, alcohol abuse, and immunosuppression.
- Ongoing research into vaccine development is critical for controlling melioidosis.
Related Concept Videos
01:30Bacterial Phylum Spirochaetes
01:24Bacterial Phylum Tenericutes