Featured Research

from universities, journals, and other organizations

Tick responsible for equine piroplasmosis outbreak identified

Date:
October 4, 2011
Source:
USDA/Agricultural Research Service
Summary:
The cayenne tick has been identified as one of the vectors of equine piroplasmosis in horses in a 2009 Texas outbreak, according to new research.

ARS scientists have identified the cayenne tick as the predominant vector of Equine piroplasmosis in horses in a 2009 Texas outbreak.
Credit: Jim Occi, BugPics, Bugwood.org.

The cayenne tick has been identified as one of the vectors of equine piroplasmosis in horses in a 2009 Texas outbreak, according to U.S. Department of Agriculture (USDA) scientists.

Related Articles


The United States has been considered free from the disease since 1978, but sporadic cases have occurred in recent years. In October 2009, in Kleberg County, Texas, a mare was presented for veterinary care with clinical signs of infection, including poor appetite and weight loss. Subsequent investigation and testing confirmed the original case and identified more than 290 additional infected animals on the ranch.

Research leader Donald Knowles, entomologist Glen Scoles and veterinary medical officer Massaro Ueti with the Agricultural Research Service (ARS) Animal Disease Research Unit, in Pullman, Wash., and collaborator Robert Mealey with Washington State University in Pullman have been working on the project with USDA's Animal and Plant Health Inspection Service (APHIS) and the Texas Animal Health Commission (TAHC).

ARS is USDA's principal intramural scientific research agency, and the research supports the USDA priority of promoting international food security.

The researchers' goal was to assess and prevent the spread of the Texas outbreak, which could have serious international trade implications if it is found to have spread beyond the ranch where the outbreak occurred. Part of their initiative was to identify the tick species responsible for the new outbreak.

Only two U.S. tick species -- Dermacentor variabilis and Rhipicephalus (Boophilus) microplus -- had previously been shown experimentally to be vectors of Theileria equi, the microbe that causes equine piroplasmosis, according to Scoles.

The cayenne tick, Amblyomma cajennense, had not previously been shown to be a competent vector. Adult cayenne ticks were collected from positive horses on the outbreak ranch and allowed to re-attach and feed on a noninfected horse. Scoles led the study showing these ticks successfully transmitted T. equi. The results will be published in the October issue of Emerging Infectious Diseases.

Knowles, Ueti and Mealey are treating some of the South Texas horses with imidocarb dipropionate. Tests conducted thus far by the team have been promising and trials are ongoing.


Story Source:

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


Cite This Page:

USDA/Agricultural Research Service. "Tick responsible for equine piroplasmosis outbreak identified." ScienceDaily. ScienceDaily, 4 October 2011. <www.sciencedaily.com/releases/2011/10/111003132222.htm>.
USDA/Agricultural Research Service. (2011, October 4). Tick responsible for equine piroplasmosis outbreak identified. ScienceDaily. Retrieved October 30, 2014 from www.sciencedaily.com/releases/2011/10/111003132222.htm
USDA/Agricultural Research Service. "Tick responsible for equine piroplasmosis outbreak identified." ScienceDaily. www.sciencedaily.com/releases/2011/10/111003132222.htm (accessed October 30, 2014).

Share This



More Plants & Animals News

Thursday, October 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How A Chorus Led Scientists To A New Frog Species

How A Chorus Led Scientists To A New Frog Species

Newsy (Oct. 30, 2014) A frog noticed by a conservationist on New York's Staten Island has been confirmed as a new species after extensive study and genetic testing. Video provided by Newsy
Powered by NewsLook.com
Surfer Accidentally Stands on Shark, Gets Bitten

Surfer Accidentally Stands on Shark, Gets Bitten

AP (Oct. 30, 2014) A 20-year-old competition surfer said on Thursday he accidentally stepped on a shark's head before it bit him off the Australian east coast. (Oct. 30) Video provided by AP
Powered by NewsLook.com
Ebola Inflicts Heavy Toll on Guinean Potato Trade

Ebola Inflicts Heavy Toll on Guinean Potato Trade

AFP (Oct. 30, 2014) The Ebola epidemic has seen Senegal and Guinea Bissau close its borders with Guinea and the economic consequences have started to be felt, especially in Fouta Djallon, where the renowned potato industry has been hit hard. Duration: 02:01 Video provided by AFP
Powered by NewsLook.com
Genetically Altered Glowing Flower on Display in Tokyo

Genetically Altered Glowing Flower on Display in Tokyo

Reuters - Innovations Video Online (Oct. 30, 2014) Just in time for Halloween, a glowing flower goes on display in Tokyo. Instead of sorcery and magic, its creators used science to genetically modify the flower, adding a naturally fluorescent plankton protein to its genetic mix. Ben Gruber 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