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Published on: July 9, 2012
Evaluation of molecular mouse sepsis panel: new portable and rapid tests for microorganism detection in suspected
Claudia Colosimo1,2, Maria Sofia Montanari1,2, Anna Marzucco1,2
1Unit of Microbiology, The Great Romagna Hub Laboratory, Pievesestina, Italy.
Introduction:
Bloodstream infections (BSIs) represent a significant public health concern, characterized by the presence of pathogens in the bloodstream, leading to serious conditions. Between 30 and 40% of BSIs evolve in sepsis, characterized by a life-threatening organ dysfunction and accompanied by a strong or dysregulated systemic immune or inflammatory response. A timely and accurate diagnosis of BSIs is crucial for ensuring effective management and treatment of critically ill patients. The diagnosis of BSIs can be initiated either from positive blood culture (BC) or directly from blood specimens using advanced diagnostic methods, these approaches are increasingly integrated into traditional diagnostic workflows.
Methods:
In the context of emerging molecular methods, Alifax introduced the Molecular Mouse (MM) Sepsis Panel in 2022. This study aims to evaluate the performance of MM cartridges in detecting Gram-positive bacteria and Gram-negative bacteria, as well as their associated resistance genes, using clinical leftover positive BCs and contrived samples for low-prevalence targets. Positive BCs were collected at the Unit of Microbiology, The Great Romagna Hub Laboratory, Pievesestina, FC, Italy.
Results:
Overall, MM Sepsis Panel showed excellent sensitivity (98.62%) and specificity (99.81%), confirming the system's reliability and accuracy.
Discussion:
The high diagnostic accuracy demonstrated by these tests supports their potential application as rapid diagnostic tools for blood cultures, facilitating prompt identification of pathogens and antimicrobial resistance determinants in clinical microbiology settings.
Insights
The Molecular Mouse (MM) Sepsis Panel accurately detects Gram-positive and Gram-negative bacteria in blood cultures. This rapid diagnostic tool shows high sensitivity and specificity, aiding in timely sepsis management.
Area of Science:
- Clinical microbiology
- Infectious diseases
- Molecular diagnostics
Background:
- Bloodstream infections (BSIs) are a major public health issue, with 30-40% progressing to sepsis.
- Accurate and rapid diagnosis of BSIs is critical for effective patient management.
- Advanced molecular methods are increasingly integrated into traditional diagnostic workflows.
Purpose of the Study:
- To evaluate the performance of the Alifax Molecular Mouse (MM) Sepsis Panel.
- To assess its ability to detect Gram-positive and Gram-negative bacteria and resistance genes.
- To validate its use with clinical leftover positive blood cultures and contrived samples.
Main Methods:
- The study utilized leftover positive blood cultures from a clinical microbiology laboratory.
- The Molecular Mouse (MM) Sepsis Panel was used to detect bacterial pathogens and resistance genes.
- Performance was evaluated using both clinical samples and contrived samples for low-prevalence targets.
Main Results:
- The MM Sepsis Panel demonstrated excellent sensitivity (98.62%) and specificity (99.81%).
- The results confirm the system's reliability and accuracy in identifying pathogens.
- The panel effectively detected both Gram-positive and Gram-negative bacteria and associated resistance genes.
Conclusions:
- The MM Sepsis Panel is a reliable and accurate tool for diagnosing bloodstream infections.
- Its high diagnostic accuracy supports its use as a rapid diagnostic method in clinical microbiology.
- This facilitates prompt identification of pathogens and antimicrobial resistance, improving patient care.
