Featured Research

from universities, journals, and other organizations

Hot Pepper Oil May Prevent Salmonella In Poultry

Date:
August 20, 2001
Source:
Virginia Tech
Summary:
Adding capsaicin, the spicy component of peppers, to the diet of neonatal broiler chicks appears to increase their resistance to Salmonella, according to Audrey McElroy, assistant professor of poultry science at Virginia Tech.

BLACKSBURG, Va., Aug. 17, 2001 -- Adding capsaicin, the spicy component of peppers, to the diet of neonatal broiler chicks appears to increase their resistance to Salmonella, according to Audrey McElroy, assistant professor of poultry science at Virginia Tech.

As an undergraduate student, McElroy and her graduate advisor got the idea of feeding hot pepper oil to chickens while they and a graduate student from Mexico were eating hamburgers filled with hot sauce and covered with layers of jalapeno peppers. When they wondered aloud why people like spicy foods even though they often cause a runny nose, watery eyes, and other ill effects, the Mexican student said that people in his country believe that hot foods and spices provide protection from disease.

Their laboratory quickly made the jump from humans to poultry, and hypothesized that a diet that included some form of hot peppers might protect broilers and other commercial poultry from intestinal disease.

The research began with purchasing 1,530 commercial meat chicks, dividing them into three groups, and feeding each group a standard corn and soybean meal-based diet for 42 days. McElroy fed the plain feed to the first group, but added five parts per million of pure capsaicin to the feed of the second group, and 20 parts per million to the third group’s feed.

She then administered Salmonella enteritidis to the chicks at 21, 28, and 42 days of age. She found that both the low and the high level of capsaicin increased resistance to the Salmonella without adversely affecting feed consumption, weight gain, or the taste of the chicken when cooked.

"What we saw from our initial microscopic evaluation is that the capsaicin appears to cause a very mild inflammation in the intestines," McElroy says.

One theory she’s investigating is the possibility that the presence of the capsaicin-induced inflammation might make it more difficult for the Salmonella to bind to the intestinal cells and, from there, to branch out to invade the blood, liver, and spleen.

"Or," she says, "it may be that the capsaicin acts on the intestine to recruit immune cells, which then fight off the Salmonella."

Her current research is designed to evaluate any observable effects of capsaicin directly on Salmonella in laboratory conditions, the effects of capsaicin on the intestinal environment, and the most economical scheme of feeding capsaicin to commercial poultry.

McElroy says that Salmonella typically results in little to no observable illness in chickens, but it is a disease of concern to the industry due to its ability to cause human illness. In a poultry house, it’s spread from bird to bird or through the feeders and water. From there, it may move into the processing plant, where it can cross contaminate other birds, however the industry implements procedures both on the farm and in the processing plant to minimize this risk.

"I think there’s probably less Salmonella in our poultry today than there was in the past, because the industry has taken preventative measures," she says. "But it would be a real breakthrough if we could find a way to reduce levels even further, without the use of antibiotics."

The poultry that McElroy has worked with seem to have no objections to the taste or sting of the capsaicin. She theorizes that chickens and other birds may have evolved so that their taste receptors adapted to allow them to eat the colorful pods. "Birds in the wild are very attracted to bright colors, and they spread the seeds by breaking up the pods," she said.

Rodents, on the other hand, have an aversion to the hot seeds. "Feeding poultry feed to which capsaicin has been added could be very beneficial in poultry houses," she says. "Rodents love to get into poultry house, where they eat the feed, destroy buildings, and spread Salmonella and other diseases. If the food is unappetizing to them, it might keep them away."

Snyder Seed, a New York-based company, developed a line of wild birdseed coated with chili pepper oil, which they call Hot Pepper Treat. "Squirrels and other rodents won’t eat the food," McElroy says.

"If we can prove that feeding capsaicin to birds does reduce Salmonella in a commercial poultry-production situation, it would provide a non-antibiotic way of reducing food-borne pathogens," she says. "Consumers want an antibiotic-free product, and this may provide the answer."

McElroy’s research is partially funded with a grant from the Virginia Agricultural Council.


Story Source:

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


Cite This Page:

Virginia Tech. "Hot Pepper Oil May Prevent Salmonella In Poultry." ScienceDaily. ScienceDaily, 20 August 2001. <www.sciencedaily.com/releases/2001/08/010820071840.htm>.
Virginia Tech. (2001, August 20). Hot Pepper Oil May Prevent Salmonella In Poultry. ScienceDaily. Retrieved September 30, 2014 from www.sciencedaily.com/releases/2001/08/010820071840.htm
Virginia Tech. "Hot Pepper Oil May Prevent Salmonella In Poultry." ScienceDaily. www.sciencedaily.com/releases/2001/08/010820071840.htm (accessed September 30, 2014).

Share This



More Plants & Animals News

Tuesday, September 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

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
Argentina Worries Over Decline of Soybean Prices

Argentina Worries Over Decline of Soybean Prices

AFP (Sep. 27, 2014) The drop in price of soy on the international market is a cause for concern in Argentina, as soybean exports are a major source of income for Latin America's third largest economy. Duration: 01:10 Video provided by AFP
Powered by NewsLook.com
Mama Bear, Cubs Hang out in California Backyard

Mama Bear, Cubs Hang out in California Backyard

Reuters - US Online Video (Sep. 27, 2014) A mama bear and her two cubs climb trees, wrestle and take naps in the backyard of a Monrovia, California home. Vanessa Johnston reports. Video provided by Reuters
Powered by NewsLook.com
'Crazy' Climate Forces Colombian Farmers to Adapt

'Crazy' Climate Forces Colombian Farmers to Adapt

AFP (Sep. 26, 2014) Once upon a time, farming was a blissfully low-tech business on Colombia's northern plains. Duration: 02:05 Video provided by AFP
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