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Updated: May 14, 2026

Identification of Rare Bacterial Pathogens by 16S rRNA Gene Sequencing and MALDI-TOF MS
Published on: July 11, 2016
Five clinical cases of Necropsobacter rosorum bacteremia
Thean Yen Tan1, Lily Siew Yong Ng, Li Ching Eng
1Department of Laboratory Medicine, Changi General Hospital, Singapore. thean_yen_tan@cgh.com.sg
Abstract:
Five cases of bacteremia with Necropsobacter rosorum are described, originating from intra-abdominal infections or localized soft tissue infections in the pelvic region. N. rosorum is consistently misidentified by commercial identification systems, which may delay recognition of this organism as a human pathogen.
Insights
Necropsobacter rosorum bacteremia, often from pelvic infections, is frequently misidentified by commercial systems. This misidentification may hinder its recognition as a significant human pathogen, impacting patient care.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Clinical Diagnostics
Background:
- Bacteremia is a serious condition requiring accurate pathogen identification for effective treatment.
- Necropsobacter rosorum is a bacterium that has been rarely reported in human infections.
- Accurate identification of microorganisms is crucial for clinical decision-making and patient outcomes.
Observation:
- This study describes five cases of bacteremia caused by Necropsobacter rosorum.
- The infections originated from intra-abdominal or localized soft tissue infections in the pelvic region.
- Clinical presentations included serious infections requiring medical intervention.
Findings:
- Necropsobacter rosorum was consistently misidentified by commonly used commercial identification systems.
- The misidentification by diagnostic systems may lead to delayed or incorrect diagnosis.
- This highlights a potential gap in the current microbiological diagnostic capabilities for this organism.
Implications:
- Delayed recognition of Necropsobacter rosorum as a pathogen can impact patient management and treatment strategies.
- There is a need to improve identification methods for Necropsobacter rosorum in clinical laboratories.
- Enhanced awareness and diagnostic accuracy are essential for addressing Necropsobacter rosorum-associated infections.
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