Navigation Links
Showerheads Harbor a Bounty of Germs

But only people with weakened immune systems should worry, study says

MONDAY, Sept. 14 (HealthDay News) -- If your immune system is weakened, you may want to rethink that daily shower.

New research suggests that ordinary showerheads are awash in germs, particularly a type that can cause lung disease in people whose immunity to illness is compromised.

The germs could be "blasted out of the showerhead and inhaled by the person showering," said study co-author Leah M. Feazel, a researcher at the University of Colorado's department of molecular, cellular and developmental biology.

But Feazel said showerheads shouldn't pose a threat to most people. And while the new findings do raise questions, it's not clear if showerheads are any more germ-friendly than other places around the house, such as faucets, counters and toilets, she said.

Feazel and her colleagues decided to look at showerheads because they seem like an ideal place for germs to grow.

The inside of a showerhead provides ideal conditions for microbial growth, Feazel said. "It is moist, warm, protected from disturbance, and frequently fed with nutrient resources in the tap water. Also, most people have noticed discoloration on their showerheads. This 'soap-scum' is actually microbial growth."

The researchers analyzed germs found in the film formed in 45 showerheads from nine U.S. cities. They found a variety of bacteria in showerheads, most of which don't cause illness in people. But they also found germs called mycobacteria, which are common and can cause lung disease in people with compromised immune systems, Feazel said.

The levels of certain germs that could spell trouble were 100 times above what they were in water before it made its way to the showerhead, the researchers said.

The unique thing about showerheads is that the germs could be inhaled. People are unlikely to inhale other kinds of household germs that fit into the category known as biofilms, with the exception of those produced by humidifiers, according to the study.

The findings were published in this week's online issue of the Proceedings of the National Academy of Sciences.

Feazel stressed that most people shouldn't be concerned about showerheads.

"If a person is worried about the risk of lung infection from showering, they have several options," she said. "Bathing, rather than showering, is probably best for those who are at risk. The size of the water droplets produced in bathing is too large to go deep into the lungs, whereas showering creates tiny particles that can go very deep and cause disease."

An all-metal showerhead -- not a plastic one with a metal coating -- is another alternative, as is replacing a showerhead several times a year, Feazel said.

"Cleaning the inside of a showerhead is very difficult and may be only partially effective," she explained.

George A. O'Toole, an associate professor in the department of microbiology and immunology at Dartmouth Medical School, noted that germs lurk everywhere.

"I imagine that if you looked at the kitchen sink, faucet and drain, the insinkerator, your dishwasher, the toilet, your washing machine and the hose in the yard, you might find similar pathogens," he said.

In the case of showerheads, he said, "people with good immune systems really don't need to worry about this. People with bad immune systems probably do, but they also need to worry about every encounter with microbes."

People with weakened immune systems include those infected with HIV, cancer patients undergoing chemotherapy, and recent transplant recipients.

More information

Learn more about germs from the Nemours Foundation.

SOURCES: Leah M. Feazel, researcher, department of molecular, cellular and developmental biology, University of Colorado, Boulder; George A. O'Toole, Ph.D., associate professor, department of microbiology and immunology, Dartmouth Medical School, Hanover, N.H.; Sept. 14-18, 2009, Proceedings of the National Academy of Sciences, online

Copyright©2009 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Backyard Raccoon Latrines Harbor Hidden Dangers
2. More Than 5,000 Expected for Greater Chicago Food Depositorys 24th Annual Hunger Walk on Saturday, June 20, at Montrose Harbor
3. Bay Harbor Podiatry Group Launches New Revolutionary Laser Treatment for Nail Fungus
4. Little Harbor Publishing Announcing Release of Manning Up In Alaska by Dick Drechsler
5. Bob Gold & Associates Steps Up as Marketing & PR Agency for Bay Harbor Podiatry Group
6. National Health Experts to Announce Creation of Bipartisan Coalition to Fight Marylands Growing Burden of Chronic Disease Tuesday at Inner Harbor
7. Wainwright Bank Provides $10.6 Million to Harbor Health Services, Inc.
8. Striking Oak Harbor Employees Honor Retirees
9. Cold Spring Harbor Protocols features tissue culture methods for immune cells and neurons
10. Individuals Associated with Vinson Hall Retirement Community, Who Survived Pearl Harbor Attack, to Participate in Navy Memorial Event December 7
11. Announcing a Monumental Sharing of Laser Innovation: The American Society for Laser Medicine and Surgery (ASLMS) Holds 29th Annual Conference in National Harbor, Md., April 1 - 5, 2009
Post Your Comments:
(Date:11/24/2015)... ... 2015 , ... With Thanksgiving right around the corner, holiday travel season is ... your family and vehicle. , According to the National Highway Traffic Safety Administration, 301 ... sharing the following safety tips from the NHTSA: , ...
(Date:11/24/2015)... ... November 24, 2015 , ... Abington Hospital – Jefferson Health ... Quality® Bariatric Surgery Facility for treating individuals living with morbid or extreme obesity. ... available to its members to help them make informed decisions about their healthcare ...
(Date:11/24/2015)... ... November 24, 2015 , ... Sir Grout of Baltimore ... TrustDale certification. The award recognizes good companies for excellence in service and a ... grout, and hard surface restoration company earned this recognition after a thorough review ...
(Date:11/24/2015)... ... 24, 2015 , ... Autism Speaks, the world’s leading autism science and advocacy ... and the generosity of people around the world. On December 1, supporters can make ... – and share the personal stories behind those gifts. , Just as Black ...
(Date:11/24/2015)... ... , ... All her life, Don Peck’s mother wondered if she was a descendant of Samuel ... After a 25-year search for information, Don and his aunt discovered that she was ... Turns out, it was Don’s father who was descended from not one, but four ...
Breaking Medicine News(10 mins):
(Date:11/24/2015)... NEW DELHI , November 25, 2015 ... fear invoked due to repeated failure of IVF cycles. ... Rani Bhatia was totally dejected and had lost all hopes that ... the first Indian miracle child conceived after failure of ... to abroad (UK) before they decided to take one last ...
(Date:11/24/2015)... WuXi PharmaTech (Cayman) Inc. ("WuXi" or the ... capability and technology platform company serving the pharmaceutical, biotechnology, ... China and the United States ... meeting of shareholders held today, the Company,s shareholders voted ... the previously announced agreement and plan of merger (the ...
(Date:11/24/2015)...  Thanks to a donor with a personal connection ... Sister Diane Grassilli Center for Women,s Health now offers ... San Francisco . Fred Ruhland ... a gift of $617,320 that allowed the Center to ... and Whole Breast Ultrasound. Tomosynthesis, three-dimensional (3-D) mammography for ...
Breaking Medicine Technology: