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Lessons learned about pneumonic plague diagnosis from two outbreaks, Democratic Republic of the Congo
Eric Bertherat1, Philippe Thullier, Jean Christophe Shako
1World Health Organization, Geneva, Switzerland. bertherate@who.int
Abstract:
Pneumonic plague is a highly transmissible infectious disease for which fatality rates can be high if untreated; it is considered extremely lethal. Without prompt diagnosis and treatment, disease management can be problematic. In the Democratic Republic of the Congo, 2 outbreaks of pneumonic plague occurred during 2005 and 2006. In 2005, because of limitations in laboratory capabilities, etiology was confirmed only through retrospective serologic studies. This prompted modifications in diagnostic strategies, resulting in isolation of Yersinia pestis during the second outbreak. Results from these outbreaks demonstrate the utility of a rapid diagnostic test detecting F1 antigen for initial diagnosis and public health management, as well as the need for specialized sampling kits and trained personnel for quality specimen collection and appropriate specimen handling and preservation for plague confirmation and Y. pestis isolation. Efficient frontline management and a streamlined diagnostic strategy are essential for confirming plague, especially in remote areas.
Insights
Prompt diagnosis and treatment of pneumonic plague are crucial. Rapid diagnostic tests and improved specimen handling are essential for effective management of Yersinia pestis outbreaks, especially in remote regions.
Area of Science:
- Epidemiology
- Infectious Diseases
- Microbiology
Background:
- Pneumonic plague is a severe, highly transmissible disease with high fatality rates if untreated.
- Effective management is challenging due to the need for prompt diagnosis and treatment.
- Outbreaks in the Democratic Republic of the Congo (2005-2006) highlighted diagnostic limitations.
Purpose of the Study:
- To evaluate diagnostic strategies for pneumonic plague during outbreaks.
- To assess the utility of rapid diagnostic tests for Yersinia pestis.
- To identify needs for effective specimen collection and handling in remote settings.
Main Methods:
- Retrospective serologic studies for initial etiological confirmation.
- Modification of diagnostic strategies between outbreaks.
- Implementation and evaluation of a rapid diagnostic test for F1 antigen detection.
- Assessment of specialized sampling kits and personnel training.
Main Results:
- Initial outbreak confirmation relied on retrospective serology due to laboratory limitations.
- Modified strategies led to the isolation of Yersinia pestis in the second outbreak.
- A rapid diagnostic test for F1 antigen proved useful for initial diagnosis and public health response.
- Effective plague confirmation and Y. pestis isolation require quality specimen collection, handling, and preservation.
Conclusions:
- Streamlined diagnostic strategies are vital for confirming plague, particularly in resource-limited and remote areas.
- Rapid diagnostic tests aid frontline management and public health decision-making.
- Specialized kits and trained personnel are necessary for accurate etiological confirmation and pathogen isolation.
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