Featured Research

from universities, journals, and other organizations

MRSA Found In Midwestern Swine, Workers

Date:
January 26, 2009
Source:
University of Iowa
Summary:
The first study documenting methicillin-resistant Staphylococcus aureus (MRSA) in swine and swine workers in the United States has just been published. The investigators found a strain of MRSA known as ST398 in a swine production system in the Midwest.

The first study documenting methicillin-resistant Staphylococcus aureus (MRSA) in swine and swine workers in the United States has been published by University of Iowa researchers.

Related Articles


The investigators found a strain of MRSA, known as ST398, in a swine production system in the Midwest, according to the new study.

"Our results show that colonization of swine by MRSA was very common in one of two corporate swine production systems we studied," said Tara Smith, Ph.D., associate professor of epidemiology in the University of Iowa College of Public Health and lead author of the study. "Because ST398 was found in both animals and humans, it suggests transmission between the two.

"Our findings also suggest that once MRSA is introduced, it may spread broadly among both swine and their caretakers. Agricultural animals could become an important reservoir for this bacterium," Smith added.

Staphylococcus aureus, often called "staph," are bacteria commonly carried on the skin or in the nose of healthy people. MRSA is a type of staph that is resistant to the broad-spectrum antibiotics commonly used to treat it. A recent study estimated that MRSA caused 94,000 infections and more than 18,000 deaths in the United States in 2005.

MRSA has been found in a variety of animals, including horses, cattle, dogs, cats and swine. Previous studies have shown that many swine and swine farmers in Canada and the Netherlands are colonized with MRSA. However, the University of Iowa study was the first to investigate carriage of MRSA among swine and swine farmers in the United States.

For the study, investigators analyzed nasal swabs of 299 swine and 20 swine workers from two different production systems in Iowa and Illinois. At Production System A, the overall prevalence of MRSA was 70 percent in swine and 64 percent in workers. At Production System B, all swine and human samples were negative for MRSA.

The researchers could not determine why System A had a high prevalence rate of MRSA among its swine and swine handlers, but listed several differences compared to System B. First, the systems raised different breeds of swine. Second, System A was an older, more established operation that had approximately twice the number of animals as System B. Third, both systems imported sows from different sources, raising the possibility that ST398 may have been introduced via live swine or pork products.

Other research has shown that ST398 accounts for 20 percent of all MRSA detected in the Netherlands, demonstrating the importance of considering livestock and other animals when examining the epidemiology of MRSA.

"Iowa ranks first in the nation in swine production," Smith said. "Transmission of MRSA on swine farms or in veterinary facilities could complicate efforts to reduce MRSA transmission statewide and beyond."

The investigators recommended that future studies assess the risk of MRSA disease among swine workers and their contacts, survey retail meat products for MRSA contamination, study larger populations of swine and humans to define the epidemiology of MRSA within swine operations, and assess MRSA carriage rates in other livestock.


Story Source:

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


Journal Reference:

  1. Tara C. Smith et al. Methicillin-Resistant Staphylococcus aureus (MRSA) Strain ST398 Is Present in Midwestern U.S. Swine and Swine Workers. PLoS One, Online Jan. 23, 4(1): e4258 DOI: 10.1371/journal.pone.0004258

Cite This Page:

University of Iowa. "MRSA Found In Midwestern Swine, Workers." ScienceDaily. ScienceDaily, 26 January 2009. <www.sciencedaily.com/releases/2009/01/090122202804.htm>.
University of Iowa. (2009, January 26). MRSA Found In Midwestern Swine, Workers. ScienceDaily. Retrieved February 27, 2015 from www.sciencedaily.com/releases/2009/01/090122202804.htm
University of Iowa. "MRSA Found In Midwestern Swine, Workers." ScienceDaily. www.sciencedaily.com/releases/2009/01/090122202804.htm (accessed February 27, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, February 27, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Sleeping Too Much Or Too Little Might Increase Stroke Risk

Sleeping Too Much Or Too Little Might Increase Stroke Risk

Newsy (Feb. 26, 2015) People who sleep more than eight hours per night are 45 percent more likely to have a stroke, according to a University of Cambridge study. Video provided by Newsy
Powered by NewsLook.com
London Show Dissects History of Forensic Science

London Show Dissects History of Forensic Science

AFP (Feb. 25, 2015) Forensic science, which has fascinated generations with its unravelling of gruesome crime mysteries, is being put under the microscope in an exhibition of real criminal investigations in London. Duration: 00:53 Video provided by AFP
Powered by NewsLook.com
Michigan Couple Celebrates Identical Triplets

Michigan Couple Celebrates Identical Triplets

AP (Feb. 25, 2015) A suburban Detroit couple who have two older children are adjusting to life after becoming parents to identical triplets _ a multiple birth a doctor calls rare. (Feb. 25) Video provided by AP
Powered by NewsLook.com
Mayor Says District of Columbia to Go Ahead With Pot Legalization

Mayor Says District of Columbia to Go Ahead With Pot Legalization

Reuters - News Video Online (Feb. 25, 2015) Washington&apos;s mayor says the District of Columbia will move forward with marijuana legalization, despite pushback from Congress. Rough Cut (no reporter narration). Video provided by Reuters
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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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