Featured Research

from universities, journals, and other organizations

MRSA infection shown to be seasonal

Date:
March 25, 2011
Source:
Lifespan
Summary:
A new study has found a significant increase in the occurrence of methicillin-resistant Staphylococcus aureus (MRSA) infections in the summer and autumn months. The increase was more pronounced in the pediatric population than in adults.

A new study from Rhode Island Hospital has found a significant increase in the occurrence of methicillin-resistant Staphylococcus aureus (MRSA) infections in the summer and autumn months. The increase was more pronounced in the pediatric population than in adults. The study is now published online in advance of print in PloS ONE.

Lead author Leonard Mermel, D.O., Sc.M., medical director of the department of epidemiology and infection control at Rhode Island Hospital, and his colleagues conducted a retrospective 10-year study by examining MRSA isolates submitted to the hospital's microbiology laboratory.

Their findings indicate that for pediatric patients there were approximately 1.85 times as many community-associated (CA) MRSA infections and 2.94 as many hospital-associated (HA) MRSA infections in the third and fourth quarters of the year than in the first two quarters. For adults, there were 1.14 times as many CA-MRSA infections in the second two quarters as in the first two quarters, but no seasonal variation was observed in adult HA-MRSA infections.

The researchers also reviewed published articles over the last 70 years that had any mention of seasonality and Staph aureus infections. They summarized the literature search in two comprehensive tables that reveal an increased incidence of such infections during summer and autumn in many temperate regions of the world and during the warmest months of the year in tropical regions.

The researchers believe that it is the sequence of the third and fourth quarters that is important in demonstrating the peak in MRSA infections rather than just the warmest quarter of the year. Mermel says, "We reviewed meteorological data for Rhode Island during the decade of our study period and found that the second quarter was warmer, on average, than the fourth quarter. We believe that an increased incidence of infection in autumn, the fourth quarter, may reflect a lag between Staphylococcal colonization and subsequent infection."

The researchers note that hydration of the skin is important for microbial growth, and maximum hydration is achieved when high temperatures combine with high relative humidity, which also promotes increased sweat production. Mermel says, "The presence of both factors, heat and humidity, may be critically important in providing the environmental conditions that facilitate heavy grown of S. aureus on the skin."

Mermel, who is also a professor of medicine at The Warren Alpert Medical School of Brown University, says, "We've demonstrated that Staph infections, particularly skin infections in children, follow a seasonal pattern. Until now, this basic observation of one of the most common human infections has been generally unnoticed, minimized or doubted in the medical literature." He concludes, "It is hoped that this study will promote further investigation into the seasonality of S. aureus infections to better understand the biologic basis for this observation."


Story Source:

The above story is based on materials provided by Lifespan. Note: Materials may be edited for content and length.


Journal Reference:

  1. Leonard A. Mermel, Jason T. Machan, Stephen Parenteau. Seasonality of MRSA Infections. PLoS ONE, 2011; 6 (3): e17925 DOI: 10.1371/journal.pone.0017925

Cite This Page:

Lifespan. "MRSA infection shown to be seasonal." ScienceDaily. ScienceDaily, 25 March 2011. <www.sciencedaily.com/releases/2011/03/110324153502.htm>.
Lifespan. (2011, March 25). MRSA infection shown to be seasonal. ScienceDaily. Retrieved July 28, 2014 from www.sciencedaily.com/releases/2011/03/110324153502.htm
Lifespan. "MRSA infection shown to be seasonal." ScienceDaily. www.sciencedaily.com/releases/2011/03/110324153502.htm (accessed July 28, 2014).

Share This




More Health & Medicine News

Monday, July 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Trees Could Save More Than 850 Lives Each Year

Trees Could Save More Than 850 Lives Each Year

Newsy (July 27, 2014) A national study conducted by the USDA Forest Service found that trees collectively save more than 850 lives on an annual basis. Video provided by Newsy
Powered by NewsLook.com
Google's Next Frontier: The Human Body

Google's Next Frontier: The Human Body

Newsy (July 27, 2014) Google is collecting genetic and molecular information to paint a picture of the perfectly healthy human. Video provided by Newsy
Powered by NewsLook.com
What's To Blame For Worst Ebola Outbreak In History?

What's To Blame For Worst Ebola Outbreak In History?

Newsy (July 27, 2014) A U.S. doctor has tested positive for the deadly Ebola virus, as the worst-ever outbreak continues to grow. Video provided by Newsy
Powered by NewsLook.com
Losing Sleep Leaves You Vulnerable To 'False Memories'

Losing Sleep Leaves You Vulnerable To 'False Memories'

Newsy (July 27, 2014) A new study shows sleep deprivation can make it harder for people to remember specific details of an event. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins