Navigation Links
Pocket-sized anthrax detector aids global agriculture

ALBUQUERQUE, N.M. A credit-card-sized anthrax detection cartridge developed at Sandia National Laboratories and recently licensed to a small business makes testing safer, easier, faster and cheaper.

Bacillus anthracis, the bacteria that causes anthrax, is commonly found in soils all over the world and can cause serious, and often fatal, illness in both humans and animals. The bacteria can survive in harsh conditions for decades. In humans, exposure to B. anthracis may occur through skin contact, inhalation of spores or eating contaminated meat.

Melissa Finley's research in Sandia's International Biological Threat Reduction Program inspired the detector, which currently is named BaDx (Bacillus anthracisDiagnostic). Finley works with veterinary labs in less-developed countries, helping them improve safety, security and efficiency at diagnosing infectious diseases.

Making labs efficient, safer and more secure

"Working with dangerous samples like B. anthracis spores places laboratory staff at risk. Concentrating many positive test samples in a lab could also tempt someone to steal positive anthrax samples for nefarious uses," Finley said.

Currently, samples must be propagated in a laboratory that uses specialized tools requiring a consistent power supply not always available in the developing world, Finley said.

But another big barrier is cost.

"Farmers in many developing countries don't make a lot of money, so they don't pay for diagnostic testing often. When they do, they can't afford to pay a lot for it," said Finley.

The most common diagnostic test for anthrax costs around $30, which is out of the reach of many farmers, perhaps discouraging them from testing animals they suspect as infected, Finley said. The new device, which is more like a pocket-sized laboratory, could cost around $5-7 and does not require specialized tools to use.

The consequences of not testing animals suspected of having anthrax are life-and-death.

"Because B. anthracis forms spores when exposed to oxygen, slaughtering or opening the carcass of an infected animal places many people at risk," Finley said.

Complex and sensitive, but simple to operate

The device requires no battery or electric power to operate. It's hardy against wide temperature variation and can detect very small numbers of B. anthracis spores. That could make it especially useful in parts of the world where anthrax is prevalent, but refrigeration and lab facilities are lacking.

The device can be used by a trained technician in the field. The technician would put a sample swab into the amplification chamber, which contains selective growth media. The device then uses a lateral flow assay, similar to a common pregnancy test, to detect the B. anthracis. Magnetically operated valves allow the sample to advance from stage to stage to complete the testing process. A colored line will appear on the device several hours later, if the test is positive for the bacteria.

After testing, the technician can initiate a chemical process that sterilizes the device, which avoids the risk of positive samples accumulating and falling into the wrong hands. In addition to the sterilization process, the device is sealed closed, making extraction of live bacteria difficult.

"The device amplifies the B. anthracis so it can detect as few as 100 spores instead of the typical 1-10 million required for detection," says device engineer Jason Harper.

Harper and engineer Thayne Edwards developed the microfluidics platform with the patent pending magnetic valves that move the sample through the testing process.

Lead bioscientist Bryan Carson, with technologists Jackie Murton and Bryce Ricken, developed the selective media, and worked on building and testing the device, as well as helping to develop the decontamination strategy.

Nanotechnology researchers George Bachand and Amanda Carroll-Portillo are working on improved strips for the lateral flow assay.

Bill Arndt a researcher in the International Biological Threat Reduction Program, who regularly works in the developing world, provided guidance on device design.

The device was tested by Julie Lovchik of the Department of Internal Medicine at the University of New Mexico, using virulent strains of B. anthracis. Testing at Sandia was done using nondisease-causing strains of the bacteria.

Sandia has licensed BaDx to Aquila, a New Mexico small business that specializes in the design and manufacture of technologies and services for nuclear security and international safeguards.

"We see a lot of potential for government customers and nongovernmental organizations as well as commercial markets," said Markku Koskelo, chief scientist for Aquila.

The team hopes to use the basic device design to develop tests for other types of disease-carrying bacteria such as salmonella and group A streptococcus, which causes strep throat. Future devices could be created to detect infectious diseases in humans and stem the spread of infectious diseases during epidemics.


Contact: Stephanie Holinka
DOE/Sandia National Laboratories

Related biology news :

1. Killer silk: Making silk fibers that kill anthrax and other microbes in minutes
2. Compound discovered at sea shows potency against anthrax
3. Answering crucial questions about anthrax exposure
4. NIH scientists describe how anthrax toxins cause illness, death
5. Biomedical Advanced Research and Development Authority (BARDA) Exercises Option with Pfenex Inc. To Extend Contract and Increase Funding for the Development of a Recombinant Protective Antigen (rPA) Based Anthrax Vaccine
6. Faster anthrax detection could speed bioterror response
7. Detector of DNA damage: Structure of a repair factor revealed
8. Spatial knowledge vs. spatial choice: The hippocampus as conflict detector?
9. RIT leads development of next-generation infrared detectors
10. ORNLs newly licensed neutron detector will advance human disease research
11. Large Area Picosecond Photodetectors push timing envelope
Post Your Comments:
Related Image:
Pocket-sized anthrax detector aids global agriculture
(Date:10/29/2015)... , Oct. 29, 2015  Rubicon Genomics, Inc., ... U.S. distribution of its DNA library preparation products, ... Rubicon,s new ThruPLEX Plasma-seq kit. ThruPLEX Plasma-seq has ... preparation of NGS libraries for liquid biopsies--the analysis ... and prognostic applications in cancer and other conditions. ...
(Date:10/27/2015)... 27, 2015 In the present market scenario, ... for various industry verticals such as banking, healthcare, defense, ... growing demand for secure & simplified access control and ... as hacking of bank accounts, misuse of users, , ... as PC,s, laptops, and smartphones are expected to provide ...
(Date:10/26/2015)... and LAS VEGAS , ... Nok Labs , an innovator in modern authentication and ... today announced the launch of its latest version of ... platform enabling organizations to use standards-based authentication that supports ... Nok S3 Authentication Suite is ideal for organizations deploying ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... SAN DIEGO , Nov. 24, 2015 Halozyme Therapeutics, ... Jaffray Healthcare Conference in New York on ... Dr. Helen Torley , president and CEO, will provide a ... New York at 1:00 p.m. ET/10:00 a.m. ... communication and investor relations, will provide a corporate overview. --> ...
(Date:11/24/2015)... N.C. , Nov. 24, 2015  Clintrax Global, Inc., a ... North Carolina , today announced that the company has set ... represented a 391% quarter on quarter growth posted for Q3 of ... and Mexico , with the establishment ... in December 2015. --> United Kingdom ...
(Date:11/24/2015)... November 24, 2015 --> ... research report released by Transparency Market Research, the global ... a CAGR of 17.5% during the period between 2014 ... - Global Industry Analysis, Size, Volume, Share, Growth, Trends ... prenatal testing market to reach a valuation of US$2.38 ...
(Date:11/24/2015)... ... November 24, 2015 , ... InSphero AG, the leading supplier of easy-to-use solutions ... Melanie Aregger to serve as Chief Operating Officer. , Having joined InSphero ... team and was promoted to Head of InSphero Diagnostics in 2014. There ...
Breaking Biology Technology: