We use cookies to understand how you use our site and to improve your experience. This includes personalizing content and advertising. To learn more, click here. By continuing to use our site, you accept our use of cookies. Cookie Policy.

Features Partner Sites Information LinkXpress
Sign In
Advertise with Us
RANDOX LABORATORIES

Download Mobile App




Events

ATTENTION: Due to the COVID-19 PANDEMIC, many events are being rescheduled for a later date, converted into virtual venues, or altogether cancelled. Please check with the event organizer or website prior to planning for any forthcoming event.
04 May 2021 - 07 May 2021
Virtual Venue

Fast Antibacterial Susceptibility Testing by Measuring Electron Transfer Metabolism

By LabMedica International staff writers
Posted on 07 Dec 2020
Print article
Image: A recently developed device enables faster testing of antibiotic-resistant bacteria (Photo courtesy of Dr. Seokheun `Sean` Choi)
Image: A recently developed device enables faster testing of antibiotic-resistant bacteria (Photo courtesy of Dr. Seokheun `Sean` Choi)
A recently developed device facilitates bacterial antibiotics susceptibility testing by measuring the effect of these drugs on bacterial electron transfer metabolism.

Since some 2.8 million antibiotic-resistant infections occur annually in the United States with more than 35,000 fatalities, fast and simple antimicrobial susceptibility testing (AST) is urgently required to guide effective antibiotic usages and for monitoring of the antimicrobial resistance rate.

Towards this end, investigators at Binghamton University (NY, USA) established a rapid, quantitative, and high-throughput phenotypic AST by measuring electrons transferred from the interiors of microbial cells to external electrodes. Since the transferred electrons are based on microbial metabolic activities and are inversely proportional to the concentration of potential antibiotics, the changes in electrical outputs can be readily used as a signal to efficiently monitor bacterial growth and antibiotic susceptibility.

For this study, the investigators utilized the common Gram-negative pathogenic bacterium Pseudomonas aeruginosa together with the first-line antibiotic gentamicin. The novel detector had eight sensors printed on a paper surface. The minimum inhibitory concentration (MIC) values generated by the new technique were validated by the gold standard broth microdilution (BMD) method.

Results revealed that the new approach provided quantitative, actionable MIC results within just five hours, as it measured electricity produced by bacterial metabolism instead of the days needed for growth-observation methods.

"To effectively treat the infections, we need to select the right antibiotics with the exact dose for the appropriate duration," said senior author Dr. Seokheun Choi, associate professor of electrical and computer engineering at Binghamton University. "There is a need to develop an antibiotic-susceptibility testing method and offer effective guidelines to treat these infections."

"Although many bacteria are energy-producing, some pathogens do not perform extracellular electron transfer and may not be used directly in our platform. However, various chemical compounds can assist the electron transfer from non-electricity-producing bacteria," said Dr. Choi. "For instance, E. coli cannot transfer electrons from the inside of the cell to the outside, but with the addition of some chemical compounds, they can generate electricity. Now we are working on how to make this technique general to all bacteria cells. We leverage this biochemical event for a new technique to assess the antibiotic effectiveness against bacteria without monitoring the whole bacterial growth. As far as I know, we are the first to demonstrate this technique in a rapid and high-throughput manner by using paper as a substrate."

The new method for determining bacterial antibiotic resistance was published in the November 15, 2020 issue of the journal Biosensors and Bioelectronics.

Related Links:
Binghamton University

Gold Supplier
Respiratory Panel with SARS-CoV-2
BioFire Respiratory 2.1-EZ (RP2.1- EZ) Panel With SARS-CoV-2
New
Multi-Well Sample Loader
AccuLoader
Laboratory Automation Solution
SATLAS-TCA
New
Gold Supplier
Tumor Marker Control
Tumor Marker Control

Print article
BIOHIT  Healthcare OY

Channels

Industry

view channel
Image: The Luminex Aries® System (Photo courtesy of Luminex Corporation)

DiaSorin to Acquire Luminex to Broaden Positioning in Molecular Diagnostics Space

DiaSorin S.p.A. (‎Saluggia‎, Italy) has announced that its Board of Directors has unanimously approved and signed a definitive merger agreement for DiaSorin to acquire Luminex Corporation (Austin, TX,... Read more
Copyright © 2000-2021 Globetech Media. All rights reserved.