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Updated: Feb 23, 2026
Bacterial Detection & Identification Using Electrochemical Sensors
Published on: April 23, 2013
An Electrochemical Biosensor for Rapid Detection of Pediatric Bloodstream Infections
Eranda M K Kurundu Hewage1, Debbie Spear2, Todd M Umstead1
11 Pulmonary Immunology and Physiology Laboratory, Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, PA, USA.
Insights
This study found that electrochemical biosensors detect bacterial growth similarly in both pediatric and adult blood samples. This validates the technology for diagnosing bloodstream infections in children, potentially improving patient outcomes.
Area of Science:
- Biomedical Engineering
- Clinical Microbiology
- Pediatric Infectious Diseases
Background:
- Bloodstream infections are a significant cause of illness and death in children.
- Electrochemical biosensors offer rapid and accurate pathogen identification.
- Limited data exist on age-related differences in bacterial growth or biosensor performance in pediatric blood.
Purpose of the Study:
- To evaluate the performance of an electrochemical biosensor using pediatric blood samples.
- To compare bacterial detection in pediatric versus adult blood.
- To address the knowledge gap regarding age-specific biosensor responses.
Main Methods:
- Bacterial (Escherichia coli) spiked blood samples from pediatric and adult volunteers were analyzed.
- A novel electrochemical biosensor technology was applied.
- Signals generated at different time points were compared between adult and pediatric samples.
Main Results:
- The electrochemical biosensor detected bacterial growth similarly in both pediatric and adult blood.
- No significant differences in signal generation were observed based on host age.
- The technology demonstrated consistent performance across age groups.
Conclusions:
- Electrochemical biosensors show promise for diagnosing bloodstream infections in children.
- The findings support the use of this technology in pediatric clinical settings.
- Further research can advance rapid diagnostics for pediatric infections.
Abstract:
Bloodstream infections are major contributing factors of morbidity and mortality among children. Precise and timely identification of causative agents can improve the clinical management and outcome of the infection, potentially saving lives. Electrochemical biosensors previously described by Gao et al. (2017) have the potential to deliver greater speed and discrimination. However, to date there are no data that determine whether the age of the host would cause bacteria to demonstrate different growth characteristics, or whether pediatric samples would behave differently using this electrochemical biosensor. The importance of this knowledge gap is clear: the preclinical testing phase of this line of research is limited by the relative lack of pediatric healthy blood volunteers to complete this work. Therefore, in this study we have applied this novel technology to diagnose bacteria spiked into pediatric blood and compared directly with adult blood samples. Only 180 µL of blood was utilized from both adult and pediatric volunteers and inoculated with Escherichia coli 67, and the signals generated at different time points were compared. We were able to demonstrate that the signals generated by adult and pediatric blood were not significantly different with this detection technology.
