Microscale Co-Culture Platform for Polymicrobial Antibiotic Testing
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Solution Overview
Problem
Current methods for antibiotic sensitivity testing are inadequate for polymicrobial infections, neglecting the interactions between multiple bacterial strains and providing poor predictive value due to oversimplification, which can lead to ineffective treatment strategies.
Innovation Solution
A microscale co-culture platform with a plurality of chambers and wells, utilizing a permeable membrane for soluble-factor communication, allowing high-throughput testing of multiple bacterial strains in interaction with antibiotics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional one-microbe-one-disease testing methods are used, then the testing process is simple and straightforward, but the predictive value is poor and interactions between multiple bacterial strains are neglected
Solution Approach 1:
The testing platform is segmented into multiple independent chambers, each capable of housing different bacterial strains. This segmentation allows simultaneous testing of multiple microbial combinations while maintaining individual control over each strain's environment, thereby improving predictive value without overwhelming complexity
Solution Approach 2:
The platform is designed with universal chambers and wells that can accommodate various bacterial strains and antibiotic treatments. The same chamber structure serves multiple functions: housing single or multiple strains, enabling soluble-factor communication, and allowing high-throughput screening of different antibiotic combinations, thus improving reliability without proportionally increasing complexity
2Measurement precision
If macroscale liquid cultures are used for co-cultures, then the setup is simple, but convective flow causes rapid mixing and dilution of localized diffusible factors, losing valuable local interaction phenotypes
Solution Approach 1:
The platform transitions from macroscale to microscale dimensions, fundamentally changing the fluid dynamics. At the microscale, diffusion dominates over convection, allowing localized factors to accumulate and interact without rapid mixing. This dimensional change enables precise detection of local interaction phenotypes while maintaining a relatively simple chamber-based structure
3Productivity
If pairwise co-cultures are performed in conventional vessels, then the process is easy to perform, but throughput is limited and cannot screen the vast parameter space of interactions
Solution Approach 1:
Multiple pairwise co-culture experiments are merged into a single integrated platform. The platform combines multiple chambers and wells into one system, allowing simultaneous screening of numerous bacterial strain combinations and antibiotic treatments. This merging dramatically increases throughput while maintaining operational simplicity through standardized chamber designs and unified fluidic connections
4Reliability
If current antibiotic sensitivity testing methods are used, then the testing protocol is simple, but treatment strategies may be ineffective due to neglecting interplay between multiple pathogens
Solution Approach 1:
The platform introduces soluble factors as intermediaries that mediate interactions between multiple bacterial strains. These diffusible factors allow strains to communicate and influence each other's antibiotic susceptibility in a controlled manner. The intermediary mechanism captures the interplay between pathogens, improving treatment efficacy prediction while keeping the platform structure manageable through standardized chamber-well configurations
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
Enables large-scale screening of microbial community interactions, providing a simple and high-content data readout for antibiotic sensitivity, improving treatment efficacy by accounting for interplay between multiple pathogens.
Implementation Method 1
a permeable membrane for soluble-factor communication
Data Source
AI summary
A platform and method for testing antibiotic sensitivity of a polymicrobial infection is provided. The platform includes a body defining a plurality of sets of chambers and a plurality of wells. Each set of chambers has a plurality of chambers adapted for culturing microbes of the polymicrobial infection therein. Each well is associated with a corresponding set of chambers and has an input in fluidic communication with the outlets of the plurality of chambers in the corresponding set of chambers. Selected antibiotic therapies may be received in the wells which fluidically connect the plurality of chambers in a corresponding set of chambers such that microbes cultured in the plurality of chambers in the corresponding set of chambers are in soluble factor contact.