Featured Research

from universities, journals, and other organizations

Salmonella Can Cause Poorer Eggshell Quality

Date:
October 15, 2004
Source:
USDA/Agricultural Research Service
Summary:
A decrease in eggshell quality is a trait that may be used to detect chickens infected with Salmonella, according to Agricultural Research Service scientists.

Salmonella enteritidis.
Credit: Photo by Jean Guard-Petter

A decrease in eggshell quality is a trait that may be used to detect chickens infected with Salmonella, according to Agricultural Research Service scientists.

Related Articles


Veterinary medical officer Jean Guard Bouldin, at the ARS Southeast Poultry Research Laboratory in Athens, Ga., found an interesting phenomenon--not only was Salmonella present inside chicken eggs, but other bacteria were there also. Since these bacteria are usually seen in eggs that have been contaminated through cracks in the shell, Bouldin theorized that poor eggshell quality allowed the bacteria to enter the egg.

Salmonella enteritidis is hard to detect in chickens because there are no symptoms. This poses a significant problem, because S. enteritidis, found inside the egg, is an important cause of human food-borne illness.

Bouldin and Jeff Buhr, of the ARS Poultry Processing and Meat Quality Research Unit in Athens, Ga., conducted tests in which chickens were inoculated with S. enteritidis. Eggs were then tested for hardness by compressing them until a hairline crack formed. Eggs from Salmonella-infected hens cracked easier than those from noninfected hens. Other research has shown that some strains of S. enteritidis seem to target the hen's reproductive tract, which appears to result in an egg with a less resilient shell, according to Bouldin.

At low-dose infection, Bouldin found that S. enteritidis actually stimulated egg production, particularly in older hens. This increased production may have stretched the limited eggshell material--calcium--a bit too thin, literally.

Other diseases of chickens can also decrease shell quality, but usually they result in a decrease in production and illness in hens. Changes to eggshell quality over the lifespan of a laying hen are to be expected, and thus a hen's age could be an additional risk factor.

ARS is the USDA's chief scientific research agency.


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. Note: Materials may be edited for content and length.


Cite This Page:

USDA/Agricultural Research Service. "Salmonella Can Cause Poorer Eggshell Quality." ScienceDaily. ScienceDaily, 15 October 2004. <www.sciencedaily.com/releases/2004/10/041011075318.htm>.
USDA/Agricultural Research Service. (2004, October 15). Salmonella Can Cause Poorer Eggshell Quality. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2004/10/041011075318.htm
USDA/Agricultural Research Service. "Salmonella Can Cause Poorer Eggshell Quality." ScienceDaily. www.sciencedaily.com/releases/2004/10/041011075318.htm (accessed November 28, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Friday, November 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Dinosaur Species Found in Museum Collection

New Dinosaur Species Found in Museum Collection

Reuters - Innovations Video Online (Nov. 27, 2014) A British palaeontologist has discovered a new species of dinosaur while studying fossils in a Canadian museum. Pentaceratops aquilonius was related to Triceratops and lived at the end of the Cretaceous Period, around 75 million years ago. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Classic Hollywood Memorabilia Goes Under the Hammer

Classic Hollywood Memorabilia Goes Under the Hammer

Reuters - Entertainment Video Online (Nov. 26, 2014) The iconic piano from "Casablanca" and the Cowardly Lion suit from "The Wizard of Oz" fetch millions at auction. Sara Hemrajani reports. Video provided by Reuters
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. 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:

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