Navigation Links
Biometric sensors no dirtier than doorknobs, study finds
Date:10/10/2007

y, Blomeke's team examined the bacterial recovery and transfer from three types of biometric sensors: fingerprint, hand-geometry and vein-recognition devices. Each sensor was tested separately with two kinds of bacteria: Staphylococcus aureus, a common cause of blood and skin infections, and Escherichia coli, commonly known as E. coli, which can cause diarrhea, urinary tract infections and meningitis.

To test how well the bacteria could survive on a biometric device, the surfaces were first sterilized to kill existing bacteria, then coated with a bacteria culture. Testers used sterilized gloves to touch the biometric device surface after five, 20, 40 and 60 minutes to measure how many of the bacteria were still alive and could be transferred. Testers first touched the device surface, then a sterile plate or Petri dish containing growth media to allow any bacteria present to be more easily examined. The solution on the plate was allowed to grow for 24 hours at 37 degrees Celsius (approximately 99 degrees Fahrenheit).

The next step was to test for bacterial transfer from the biometric device. To do this, the devices were sterilized, then testers wearing sterilized gloves touched the device surface and a sterile plate to measure how many bacteria were present before it was contaminated. Next, the device surfaces were contaminated with one species of bacteria at a time, and testers wearing sterilized gloves touched the device surface, then touched a sterile plate containing growth media 50 times. Just as in the other test, the solution was allowed to grow overnight to quantify the number of live cells recovered from touching the contaminated device.

Researchers found that E. coli survived on the devices slightly longer than staph bacteria, but within 20 minutes, nearly all of the bacteria had died on all three devices.

Finally, a metal doorknob was tested with the same methods. Researchers found that the transfer of bacteria from the
'/>"/>

Contact: Kim Medaris
kmedaris@purdue.edu
765-494-6998
Purdue University
Source:Eurekalert

Page: 1 2 3

Related medicine news :

1. Biometric Passports For Indians
2. New sensors developed to predict effectiveness of radiotherapy treatment
3. Sensors placed at home capable of signaling onset of early signs of dementia in elderly
4. Sour Taste Sensors Identified
5. NanoSensors Provides Update on Its Biosensor to Detect E.coli and Salmonella
6. Quality Of NHS Hospitals Getting Dirtier Despite Promises
7. Rural Canadians travel far for specialists: study
8. A new study surpasses Gene Therapy Hurdle
9. Tomato Sauce reduces Cancer Risk- Study
10. A question on study of Adult Stem Cell
11. Study on obesity and heart failure
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/24/2014)... July 24, 2014 The South American air ... million in 2014 and is expected to register a CAGR ... spends mainly on tackling internal security issues like drug trafficking. ... 75% share in the air and missile defense radar market. ... promising future in the market for radar systems in terms ...
(Date:7/24/2014)... The National Resident Matching Program (NRMP) ... new version of its smartphone app, The MATCH Program ... participating in NRMP’s Main Residency Match® and Specialties Matching ... program information during the interview process and develop program ... order lists. Rank order lists are used by ...
(Date:7/24/2014)... Indianapolis* VxP Pharma Services announced today ... include process development and commercial manufacturing for ... offered by VxP now include:, ...     Sterile Liquids and Sterile Powders , ...     Transdermal Patches ,     Animal Health ...
(Date:7/24/2014)... July 24, 2014 Becker's Hospital Review ... Hospitals and Health Systems With Great Oncology Programs." Organizations ... terms of quality patient care, cancer outcomes and research. ... for inclusion based on rankings and awards they have ... awards were considered as part of the criteria for ...
(Date:7/24/2014)... Dr. Kwame Bawuah Edusei, a diplomat, entrepreneur, medical ... to the youth to persevere in their endeavors to ... the youth to stay away from social vices and ... will afford you the opportunity of acquiring life surviving ... in your career path.” Professionals in the fields of ...
Breaking Medicine News(10 mins):Health News:South America Air and Missile Defense Radar Market is Expected to Reach $340 Million in 2020 - New Report by MicroMarket Monitor 2Health News:South America Air and Missile Defense Radar Market is Expected to Reach $340 Million in 2020 - New Report by MicroMarket Monitor 3Health News:South America Air and Missile Defense Radar Market is Expected to Reach $340 Million in 2020 - New Report by MicroMarket Monitor 4Health News:South America Air and Missile Defense Radar Market is Expected to Reach $340 Million in 2020 - New Report by MicroMarket Monitor 5Health News:National Resident Matching Program® (NRMP®) Releases New, Enhanced Version of its Smartphone App 2Health News:National Resident Matching Program® (NRMP®) Releases New, Enhanced Version of its Smartphone App 3Health News:VxP Pharma Expands Commercial Service Offering 2Health News:100 Hospitals, Health Systems With Great Oncology Programs 2Health News:100 Hospitals, Health Systems With Great Oncology Programs 3Health News:100 Hospitals, Health Systems With Great Oncology Programs 4Health News:Youth and Professionals Interact at Washington Metro Area Career Workshop Hosted by the Edusei Foundation 2
... critical levels compelled the Iranian Government to declare two ... country will remain closed on// 7 and 8 December ... Tehran have already been closed down by the Government, ... problems have been advised to remain indoors. ...
... persistent pain may be increased by an inflamed injury, according ... even after it has disappeared//. Several million Canadians are reported ... has published the study. The NR2B proteins in mice are ... to imprint upon the brain a painful response even when ...
... treatment can be given to eligible patients inclusive ... stage III colon cancer, according to the Journal ... study. The survival rates are reportedly higher with ... received chemotherapy after surgery to treat their advanced ...
... of the deadly bird flu, official reports from China has ... to be infected with the disease//. The victim hails from ... and pneumonia since November 23. ,A test done ... H5N1 infection and has a positive history of exposure to ...
... Two Chinese manufacturers who were making and selling inferior ... of several children after being fed with this fake ... estimates, up to 200 babies after being fed the ... doctors diagnosed the condition as "big head disease", where ...
... mechanism by which Hepatitis C could cause liver cancers is ... from the University of Texas have now discovered a biochemical ... between liver cancer and Hepatitis C. The link or association ... human papilloma virus (HPV), cervical cancer and genital warts. ...
Cached Medicine News:Health News:Chemotherapy Treatment Can Be Given To The Elderly also 2Health News:Bird Flu Infection Of Chinese Girl Prompts Fear Of Spread Across Asia 2Health News:Link Between Hepatitis C And Liver Cancer Unraveled By Scientists 2
(Date:7/24/2014)... July 24, 2014  Lazarus Effect, a medical ... interventional devices to facilitate removal of blood clots, ... Trademark Office has issued a new patent (U.S. ... company,s Lazarus Cover TM and ReCover TM ... is a single-component stent-retriever (stentriever) with an integrated, ...
(Date:7/24/2014)... July 24, 2014 Research and Markets ... Monitoring Market by Product, Component, Application and Geography - ... their offering. http://photos.prnewswire.com/prnh/20130307/600769 ... expected to witness a moderate growth as the markets ... have almost reached the saturation levels. The demand is ...
(Date:7/24/2014)... India , July 24, 2014 Consolidated ... Business Highlights   , India Business ... grew by 9.33% to Rs. 4,886.70 Mn Rest of ... Europe Formulations Business grew by 34.53% to Rs. 977.26 Mn ... Mn , Glenmark Pharmaceuticals Limited, the research-led ...
Breaking Medicine Technology:Lazarus Effect Receives Notice of Allowance for New US Patent Covering Core Protection Technology 2Machine Health Monitoring (Vibration Monitoring, Thermography, Ultrasound Emission, Lubricating Oil Analysis, Corrosion Monitoring, Motor Current Signature Analysis) Market - Forecast to 2020 2Glenmark's Consolidated Revenue Increases by 20.08% to Rs. 14,869.40 Mn for Q1 FY 14 - 15 2Glenmark's Consolidated Revenue Increases by 20.08% to Rs. 14,869.40 Mn for Q1 FY 14 - 15 3Glenmark's Consolidated Revenue Increases by 20.08% to Rs. 14,869.40 Mn for Q1 FY 14 - 15 4
... Challenges Explorations to support bold, ... diseases, SEATTLE, March 3 The Bill & Melinda ... accept grant,proposals for the first funding round of Grand Challenges ... globe pursue,ideas that have never before been tested for solving ...
... Research Management,Organization (RMO), has contracted with Systems Medicine ... (CTI), to provide,research and site management services for ... myxoid liposarcoma with a (12;16),translocation. The study is ... experimental drug product, brostallicin. The trial will also ...
Cached Medicine Technology:Gates Foundation Seeks Proposals for Innovative Global Health Research 2Gates Foundation Seeks Proposals for Innovative Global Health Research 3Pharmatech Teams up With Systems Medicine LLC and the Sarcoma Foundation of America for a Phase II Myxoid Liposarcoma Trial 2Pharmatech Teams up With Systems Medicine LLC and the Sarcoma Foundation of America for a Phase II Myxoid Liposarcoma Trial 3
Full Handle Laseredge Implant Blade Knife, 5.2 mm angled bevel up. Blade dimension: 16.5 mm x 5.2 mm x 4.2 mm x 1.6 mm....
Full Handle Laseredge Implant Blade Knife, 4.0 mm angled bevel up. Blade dimension: 15.2 mm x 4.0 mm x 3.0 mm x 1.6 mm....
Full Handle Laseredge Crescent Blade Knife, angled bevel down. Blade tip dimension: 12.7 mm x 2.0 mm x 3.8 mm....
Full Handle Laseredge Crescent Blade Knife, straight. Blade tip dimension: 12.7 mm x 2.0 mm x 3.8 mm....
Medicine Products: