Featured Research

from universities, journals, and other organizations

Multidrug-Resistant Bacteria Found To Be Airborne In Concentrated Swine Operation

Date:
December 7, 2004
Source:
Johns Hopkins Bloomberg School Of Public Health
Summary:
People could be exposed to antibiotic-resistant bacteria from breathing the air from concentrated swine feeding facilities, according to researchers at the Johns Hopkins Bloomberg School of Public Health. They detected bacteria resistant to at least two antibiotics in air samples collected from inside a large-scale swine operation in the Mid-Atlantic region of the United States.

People could be exposed to antibiotic-resistant bacteria from breathing the air from concentrated swine feeding facilities, according to researchers at the Johns Hopkins Bloomberg School of Public Health. They detected bacteria resistant to at least two antibiotics in air samples collected from inside a large-scale swine operation in the Mid-Atlantic region of the United States. Until now, little research has been conducted regarding the presence of antibiotic-resistant bacteria in the air within industrial swine facilities. The study adds to the understanding of various pathways in which humans can be exposed to antibiotic-resistant bacteria, such as consumption of retail pork products and contact with or ingestion of soil, surface water and groundwater near production operations. The article is published in the online edition of Environmental Health Perspectives.

“Eating retail pork products is not the only pathway of exposure for the transfer of antibiotic-resistant bacteria from swine to humans. Environmental pathways may be equally important,” said Amy Chapin, the study’s lead author and a doctoral candidate at the Bloomberg School of Public Health’s Department of Environmental Health Sciences.

Chapin explained that the use of antibiotics in industrial animal production has a significant impact on the emergence of antibiotic-resistant bacteria that threaten human health. Using antibiotics in animals can decrease the effectiveness of the same antibiotics used to combat human infections. The non-therapeutic use of antimicrobials in livestock production in the United States comprises an estimated 60 to 80 percent of the total antimicrobial production nationally. Nontherapeutic doses of drugs are given to swine to promote growth and improve feed efficiency - not to treat actual swine disease.

The airborne bacteria samples that were found to be multidrug-resistant were: Enterococcus, coagulase negative staphylococci and viridans group streptococci. These bacteria are associated with a variety of human infections. The study found that 98 percent of the isolated samples were resistant to at least two of the following antibiotics: erythromycin, clindamycin, virginiamycin and tetracycline. All of these drugs (or their human drug counterparts) are important antibiotics in the treatment of human infections. In contrast, none of the bacterial samples were resistant to vancomycin – an antibiotic that has never been approved for use in swine production in the United States.

The researchers believe workers at concentrated animal feeding operations are at greatest risk for airborne exposure to antibiotic-resistant bacteria. However, the same workers may also become reservoirs of drug-resistant bacteria that can be spread to family and the broader community. The study also raises questions about the spread of drug-resistant bacteria to areas beyond the immediate site through ventilation fans and by the application of manure from feeding operations to off-site fields.

“These research findings add another piece to our understanding of human exposure to antibiotic-resistant bacteria,” said Kellogg Schwab, PhD, assistant professor in the Bloomberg School of Public Health’s Department of Environmental Health Sciences and the study’s corresponding author. “Finding and documenting the multiple environmental pathways of exposure are critical to finding solutions to the growing, serious problem of antibiotic-resistant bacteria in humans.”

The study was supported by the Johns Hopkins Center for a Livable Future at the Johns Hopkins Bloomberg School of Public Health and the National Institute for Occupational Safety and Health, Education Research Center. Amy Chapin is a Howard Hughes Medical Institute Pre-doctoral Fellow.

A. Rule, K.Gibson, and T.J. Buckley, from the Johns Hopkins Bloomberg School of Public Health, co-authored the study.


Story Source:

The above story is based on materials provided by Johns Hopkins Bloomberg School Of Public Health. Note: Materials may be edited for content and length.


Cite This Page:

Johns Hopkins Bloomberg School Of Public Health. "Multidrug-Resistant Bacteria Found To Be Airborne In Concentrated Swine Operation." ScienceDaily. ScienceDaily, 7 December 2004. <www.sciencedaily.com/releases/2004/12/041206213925.htm>.
Johns Hopkins Bloomberg School Of Public Health. (2004, December 7). Multidrug-Resistant Bacteria Found To Be Airborne In Concentrated Swine Operation. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2004/12/041206213925.htm
Johns Hopkins Bloomberg School Of Public Health. "Multidrug-Resistant Bacteria Found To Be Airborne In Concentrated Swine Operation." ScienceDaily. www.sciencedaily.com/releases/2004/12/041206213925.htm (accessed October 1, 2014).

Share This



More Plants & Animals News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Earth Has Lost Half Its Vertebrate Wildlife Since 1970: WWF

Earth Has Lost Half Its Vertebrate Wildlife Since 1970: WWF

Newsy (Sep. 30, 2014) A new study published by the World Wide Fund for Nature found that more than half of the world's wildlife population has declined since 1970. Video provided by Newsy
Powered by NewsLook.com
Dolphins Might Use Earth's Magnetic Field As A GPS

Dolphins Might Use Earth's Magnetic Field As A GPS

Newsy (Sep. 30, 2014) A study released Monday suggests dolphins might be able to sense the Earth's magnetic field and possibly use it as a means of navigation. Video provided by Newsy
Powered by NewsLook.com
How To Battle Stink Bug Season

How To Battle Stink Bug Season

Newsy (Sep. 30, 2014) Homeowners in 33 states grapple with stink bugs moving indoors at this time of year. Here are a few tips to avoid stink bug infestations. Video provided by Newsy
Powered by NewsLook.com
California University Designs Sustainable Winery

California University Designs Sustainable Winery

Reuters - US Online Video (Sep. 27, 2014) Amid California's worst drought in decades, scientists at UC Davis design a sustainable winery that includes a water recycling system. Vanessa Johnston reports. 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


Plants & Animals

Earth & Climate

Fossils & Ruins

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