Featured Research

from universities, journals, and other organizations

New Genetic Material From Group B Streptococcus Identified

Date:
October 22, 2009
Source:
USDA/Agricultural Research Service
Summary:
Group B Streptococcus is a versatile pathogen that affects a variety of animals. Now studies are revealing new information about this pathogen.

Agricultural Research Service aquatic pathologist Joyce Evans and technician Daniel Brougher have shed new light on how Group B Streptococcus pathogens are genetically related, including identifying a previously unknown serotype in fish.
Credit: Photo by Peggy Greb

Streptococcus agalactiae (also called Group B Streptococcus, or GBS) is a versatile pathogen that affects a variety of animals. Now studies by Agricultural Research Service (ARS) scientists and their university colleagues are revealing new information about this pathogen.

The symptoms of GBS vary from animal to animal. In cattle, GBS is associated with mastitis, a painful udder inflammation that costs the U.S. cattle industry about $2 billion annually. In farmed and wild fish, the bacteria can cause meningo-encephalitis, which is accompanied by swimming difficulty and hemorrhaging.

To learn more about the emergence and transmission of GBS, scientists with the ARS Aquatic Animal Health Research Unit in Auburn, Ala., and Chestertown, Md., compared GBS samples, or "isolates," collected from infected fish, dolphins, cattle and humans. The study was led by ARS aquatic pathologist Joyce Evans in Chestertown.

The scientists collected the genetic material from several fish species in the United States, Latin America and the Middle East; a bottlenose dolphin in Kuwait; humans and cattle in North America, and humans in Japan.

The scientists used a technique known as multilocus sequence typing (MLST) to examine similarities and differences between the genes of the GBS isolates. This was the first study to apply the technology to GBS isolates from aquatic animals.

During characterization of the GBS isolates, the scientists discovered a previously unknown serotype in fish isolates from Kuwait, Brazil, Israel and the United States. This particular serotype had been found in some cattle and human GBS isolates, although it had never before been observed in fish or dolphin GBS isolates.

Using MLST data, Evans and her colleagues also discovered five previously unknown sequence types that were genetically unrelated to any known GBS sequence types. These novel genetic, serotypic and phenotypic strains will be explored for genes, unique antigens or virulence factors that may be involved in inducing protective immunity, and therefore could be potential candidates for superior vaccine efficacy against GBS in cattle and fish.

This research was published in several scientific journals between 2006 and 2009, most recently in the November 2008 issue of the Journal of Medical Microbiology and the May 2009 issue of Emerging Infectious Diseases.


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. "New Genetic Material From Group B Streptococcus Identified." ScienceDaily. ScienceDaily, 22 October 2009. <www.sciencedaily.com/releases/2009/08/090830104316.htm>.
USDA/Agricultural Research Service. (2009, October 22). New Genetic Material From Group B Streptococcus Identified. ScienceDaily. Retrieved September 17, 2014 from www.sciencedaily.com/releases/2009/08/090830104316.htm
USDA/Agricultural Research Service. "New Genetic Material From Group B Streptococcus Identified." ScienceDaily. www.sciencedaily.com/releases/2009/08/090830104316.htm (accessed September 17, 2014).

Share This



More Plants & Animals News

Wednesday, September 17, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Some Tobacco Farmers Thrive Amid Challenges

Some Tobacco Farmers Thrive Amid Challenges

AP (Sep. 16, 2014) The South's tobacco country is surviving, and even thriving in some cases, as demand overseas keeps growers in the fields of one of America's oldest cash crops. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Scientists Given Rare Glimpse of 350-Kilo Colossal Squid

Scientists Given Rare Glimpse of 350-Kilo Colossal Squid

AFP (Sep. 16, 2014) Scientists say a female colossal squid weighing an estimated 350 kilograms (770 lbs) and thought to be only the second intact specimen ever found was carrying eggs when discovered in the Antarctic. Duration: 00:47 Video provided by AFP
Powered by NewsLook.com
Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Ivorians Abandon Monkey Pets in Fear Over Ebola Virus

Ivorians Abandon Monkey Pets in Fear Over Ebola Virus

AFP (Sep. 16, 2014) Since the arrival of Ebola in Ivory Coast, Ivorians have been abandoning their pets, particularly monkeys, in the fear that they may transmit the virus. Duration: 00:47 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:
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