RNase Treatment for Bacterial rRNA Detection Sensitivity
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Solution Overview
Problem
Current methods for detecting bacterial pathogens and determining antibiotic susceptibility are limited by high background noise from free rRNA, leading to reduced sensitivity and longer detection times, which can delay effective antibiotic therapy.
Innovation Solution
Incorporating RNase into assays to degrade rRNA, allowing for the differentiation between susceptible and resistant bacteria by measuring rRNA levels with and without antibiotics, thereby reducing background noise and enhancing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If rRNA detection methods are used to detect bacterial pathogens, then sensitivity is improved, but background noise from free rRNA increases leading to reduced measurement precision
Solution Approach 1:
The patent extracts and removes free rRNA from the sample using RNase treatment before performing the rRNA detection assay. This eliminates the harmful background noise from free rRNA while preserving the ability to detect bacterial rRNA, thereby resolving the contradiction between detection sensitivity and measurement precision by removing the interfering substance that causes background noise
Solution Approach 2:
The patent introduces RNase as an intermediary substance that selectively degrades free rRNA in the sample. This mediator enables the differentiation between susceptible and resistant bacteria by controlling the rRNA degradation process, allowing accurate measurement of bacterial rRNA levels without interference from free rRNA background noise
2Measurement precision
If conventional AST methods are used to determine antibiotic susceptibility, then accuracy is maintained, but detection time is prolonged delaying effective therapy
Solution Approach 1:
The patent performs preliminary RNase treatment on the sample before conducting the rRNA detection assay. This preliminary action degrades free rRNA and prepares the sample in advance, enabling faster and more accurate susceptibility determination without requiring extended incubation or processing times, thus resolving the contradiction between accuracy and detection time
Solution Approach 2:
The patent changes the chemical state of rRNA in the sample by using RNase to degrade free rRNA into smaller fragments. This parameter change (from intact free rRNA to degraded fragments) eliminates background interference and enables rapid, accurate susceptibility testing by allowing clear differentiation between susceptible and resistant bacterial responses to antibiotics
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly lowers the limit of detection, accelerates antimicrobial susceptibility testing, and improves the ability to distinguish between resistant and susceptible bacterial isolates, enabling faster and more accurate antibiotic selection.
Implementation Method 1
Incorporating RNase into assays to degrade rRNA
Data Source
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AI summary
The present invention relates generally to materials and methods for detection of bacteria, and for testing and determination of antibiotic susceptibility of bacteria in specimens of bodily fluid and other samples. The invention also relates to materials and methods for monitoring the physiological response of bacteria to antimicrobial agents, and for reducing backround and increasing sensitivity of assays that involve the detection and/or measurement of RNA, such as rRNA.