Navigation Links
Study: Soap And Water Work Best In Ridding Hands Of Disease Viruses

The largest, most comprehensive study ever done comparing the effectiveness of hand hygiene products shows that nothing works better in getting rid of disease-causing viruses than simply washing one’s hands with good old-fashioned soap and water.

Among the viruses soapy hand washing flushes down the drain is the one that causes the common cold. Other removable viruses cause hepatitis A, acute gastroenteritis and a host of other illnesses.

A separate key finding was that waterless handwipes only removed roughly 50 percent of bacteria from volunteer subjects?hands.

"We studied the efficacy of 14 different hand hygiene agents in reducing bacteria and viruses from the hands," said Emily E. Sickbert-Bennett, a public health epidemiologist with the University of North Carolina Health Care System and the UNC School of Public Health. "No other studies have measured the effectiveness in removing both bacteria and viruses at the same time."

For the first time, too, the UNC researchers tested what happened when people cleaned their hands for only 10 seconds, Sickbert-Bennett said. That represented the average length of time researchers observed busy health-care personnel washing or otherwise disinfecting their hands at work.

"Previous studies have had people clean their hands for 30 seconds or so, but that’s not what health-care workers usually do in practice, and we wanted to test the products under realistic conditions," she said.

Anti-microbial agents were best at reducing bacteria on hands, but waterless, alcohol-based agents had variable and sometimes poor effects, becoming less effective after multiple washes, Sickbert-Bennett said. For removing viruses from the hands, physical removal with soap and water was most effective since some viruses are hardy and relatively resistant to disinfection.

A report on the findings appears in the March issue of the American Journal of Infection Control. Other authors are Drs. Will iam A. Rutala and David J. Weber, professors of medicine and epidemiology at the UNC schools of medicine and public health; Dr. Mark D. Sobsey, professor of environmental sciences and engineering in public health; and medical technologist Maria F. Gergen-Teague. Dr. Gregory P. Samsa, a Duke University biostatistician, helped analyze the data.

"These findings are important because health-care associated infections rank in the top five causes of death, with an estimated 90,000 deaths each year in the United States," Rutala said. "Hand hygiene agents have been shown to reduce the incidence of health-care associated infections, and a variety of hand hygiene agents are now available with different active ingredients and application methods.

"Our study showed that the anti-microbial hand washing agents were significantly more effective in reducing bacteria than the alcohol-based handrubs and waterless handwipes," he said. "Our study also showed that, at a short exposure time of 10 seconds, all agents with the exception of handwipes demonstrated a 90 percent reduction of bacteria on the hands."

Alcohol-based handrubs were generally ineffective in demonstrating a significant reduction of a relatively resistant virus, Rutala said. While the use of alcohol-based handrubs will continue to be an important infection control measure, it is important to recommend or require traditional hand washing with soap and water throughout each day.

Researchers first had volunteers clean their hands and then contaminated their hands with Serratia marcescens and MS2 bacteriophage. Those are, respectively, a harmless bacterium and virus comparable to, and substituted for, disease-causing organisms. After that, scientists had the subjects clean their hands with various agents and measured how much of the bacteria and virus remained afterwards.

Sixty-two adults volunteered for and participated in the study. Investigators performed five evaluations on each of the 14 agents. The N.C. Statewide Program for Infection Control and Epidemiology supported the research.


Source:University Of North Carolina School Of Medicine

Related biology news :

1. Study: homemade gene expression technology unreliable
2. Study: Well-known protein helps stem cells become secretory cells
3. Study: Harmless virus kills some cancers
4. Study: Predatory dinosaurs had bird-like pulmonary system
5. Study: Plants use dual defense system to fight pathogens
6. Study: Competition for sex is a jungle out there
7. Study: Paramedics save more lives when they dont follow the rules
8. Study: Living coral reefs provide better protection from tsunami waves
9. Water management in cells
10. Touching Molecules With Your Bare Hands
11. Transplantation Of Monkey Embryonic Stem Cells Reverses Parkinson Disease In Primates
Post Your Comments:

(Date:11/16/2015)... Nov 16, 2015  Synaptics Inc. (NASDAQ: ... solutions, today announced expansion of its TDDI product ... touch controller and display driver integration (TDDI) solutions ... These new TDDI products add to the previously-announced ... TD4302 (WQHD resolution), and TD4322 (FHD resolution) solutions. ...
(Date:11/12/2015)... 12, 2015  Arxspan has entered into an ... Harvard for use of its ArxLab cloud-based suite ... The partnership will support the institute,s efforts to ... research information internally and with external collaborators. The ... managing the Institute,s electronic laboratory notebook, compound and ...
(Date:11/11/2015)... Nov. 11, 2015   MedNet Solutions , an innovative ... clinical research, is pleased to announce that it will be ... (PCT) event, to be held November 17-19 in ... view live demonstrations of iMedNet , MedNet,s ... iMedNet has been able to deliver time and ...
Breaking Biology News(10 mins):
(Date:11/30/2015)...  An interventional radiology technique shows promise for helping morbidly ... a study being presented today at the annual meeting of ... (RSNA). --> --> ... radiologists as a way to stop bleeding in emergency situations, ... of treating obesity is new. Mubin Syed , ...
(Date:11/30/2015)... , Nov. 30, 2015 /PRNewswire/ - Zenith Epigenetics Corp. ... Dr. Norman C.W. Wong to its Board of ... comes to Zenith with a wealth of experience as co-founder ... molecular biology. --> --> ... Zenith Epigenetics, board of directors. Zenith,s long standing expertise in ...
(Date:11/30/2015)... -- TapImmune, Inc. (TPIV), a clinical-stage ... and gene-based immunotherapeutics and vaccines for the treatment of ... presenting at the 8 th Annual LD Micro ... PT. Dr. John N. Bonfiglio a TapImmune ... presentation and will join TapImmune management in meeting with ...
(Date:11/30/2015)... -- Northwest Biotherapeutics (NASDAQ: NWBO ) ("NW Bio"), a ... solid tumor cancers, announced today that the Board is ... Company welcomes Neil Woodford,s call for an ... report on NW Bio.  The Company,s Board is under ... stated, "We agree with Mr. Woodford that, at NW ...
Breaking Biology Technology: