Contagious Equine Metritis (CEM)


CEM Rule Amended for Entertainment Horses

June 25, 2008

The USDA has amended its import rules to allow noncompetitive entertainment horses to be temporarily brought into the U.S. from countries affected with contagious equine metritis (CEM), a venereal disease of horses. The final rule, titled... Read More


AHC Supporting Proposed Import Rule Change for Entertainment Horses

October 04, 2007

The American Horse Council (AHC) has submitted comments supporting the United States Department of Agriculture's proposed rules to allow horses intended to serve in noncompetitive... Read More


USDA: Horses from CEM Countries Could be Allowed as Temporary Imports

August 08, 2007

The U.S. Department of Agriculture's Animal and Plant Health Inspection Service (APHIS) has proposed to amend its regulations so that horses to be used for noncompetitive entertainment from countries affected with Read More


AAEP 2006: Reproduction Forum

July 12, 2007

Drug compounding, the ethics of treating cryptorchids, and sexually transmitted diseases were the hot topics discussed by equine practitioners at the Reproduction Forum, led by Steven Brinsko, DVM, PhD, Dipl. ACT, associate professor of... Read More


CEM Necessitates Changes to Spanish Riding School Management, Schedule

May 01, 2007

Officials with the Spanish Riding School of Vienna, Austria, announced in April that contagious equine metritis (CEM) had been confirmed in Lipizzans at the school and the Federal Stud, and that certain changes in the school's schedule and... Read More


Repro Updates

March 23, 2007

Equine reproduction was covered at the 2006 AAEP Convention including foaling, venereal disease, breeding, etc... Read More


Reproduction Problems

March 01, 2007

Drug compounding, the ethics of treating cryptorchids, and sexually transmitted diseases were the hot topics discussed by equine practitioners at the Reproduction Forum.... Read More


CEM-Positive Horses Under Quarantine in Wisconsin

November 10, 2006

Two Lipizzaner stallions in Dane County, Wisc., are enjoying the dubious honor of being the country's first cases of contagious equine metritis (CEM) since 1998.

The Office International des Epizooties (OIE, or World Organization for Animal... Read More


CEM Reported in Wisconsin

October 21, 2006

Wisconsin animal health officials have reported two cases of contagious equine metritis (CEM) in Mount Horeb to the Office International des Epizooties (OIE, or World Organization for Animal Health). A ProMED-mail post announced the disease... Read More


Quick Detection of Contagious Equine Metritis

September 29, 2006

French researchers report they have developed a rapid, effective test for detecting the bacterium that causes the venereal disease contagious equine metritis (CEM). Taylorella equigenitalis is a Gram-negative bacterium that's responsibl... Read More


CEM Confirmed in British Horse

April 13, 2005

The United Kingdom's Department for the Environment, Food, and Rural Affairs (Defra) announced the detection of a contagious equine metritis (CEM) carrier stallion  in the Frome area of Somerset (in southwest England) on April 30. Officials... Read More


Equine Disease--Fourth Quarter, 2003

June 01, 2004

From the April 2004 issue of Equine Disease Quarterly, funded by Lloyd's of London underwriters, brokers, and their Kentucky agents

The International Collating Centre in Newmarket, England, and other sources reported the... Read More


Great Britain Revises Codes on Infectious Diseases

December 11, 2003

Britain's Horserace Betting Levy Board has extensively changed its codes of practice regarding the infectious diseases contagious equine metritis (CEM), equine herpesvirus (EHV), and equine viral arteritis (EVA), which can severely disrupt... Read More


Keeping Disease at Bay

June 01, 2003

Preventing communicable diseases from striking horses should be the goal of every horse owner. Despite our best efforts, however, there are going to be occasions when a communicable malady afflicts one or more horses at a private farm or public... Read More


CEM Exemptions Rescinded for Spanish Purebred Horses

February 01, 2003

Officials from the USDA's National Center for Import/Export recently rescinded a contagious equine metritis (CEM) exemption once given to Spanish purebred horses. The exemption allowed these horses to pass through the import center with an... Read More


No Live Foal Guarantees

February 01, 2003

Subconsciously, you've been holding your breath for months. From the moment your mare was confirmed in foal, it's been a tense waiting game. And although she will be foaling soon, you know a healthy foal is still anything but a given. Between... Read More


Sexually Transmitted Diseases

October 01, 2002

You're preparing your mare for the upcoming breeding season. The stud owner insists on a bacterial culture of your mare's uterus prior to live breeding to reduce the chances of her passing any sexually transmitted diseases (STDs) she might have... Read More


Kentucky Breeding Regulations Amended

February 06, 2002

As was stated Feb. 4 in a news story on this web site, the Kentucky Department of Agriculture filed emergency regulations regarding testing procedures for contagious equine metritis (CEM) to be followed when breeding an imported mare i... Read More


Emergency Breeding Procedures Filed for Kentucky Farms

February 04, 2002

Due to concerns resulting from last year's foal losses attributed to Mare Reproductive Loss Syndrome (MRLS), the Kentucky Department of Agriculture today filed emergency regulations regarding procedures that are followed when breeding an importe... Read More


Venereal Disease in Horses

October 10, 2001

Venereal diseases are those that can be sexually transmitted. "Vener" is the Latin term for sexual intercourse and, hence, the origin of the term "venereal." The outcome of sexually transmitted diseases in horses can vary... Read More


What You Do Not Know...

October 05, 2001

The federal government decided to include funding for equine research in the fiscal year 1999 Agriculture Appropriations Bill that passed recently (see Up Front page 9). Those moneys are earmarked for several areas, including research into... Read More


Dual Hemisphere Breeding

October 03, 2001

Thoroughbred breeding stallions truly have joined the jet set. These four-legged  Romeos are flying from one part of the world to another these days as they perform breeding duties on both sides of the equator. Hundreds of... Read More


Canada and Germany Locked in CEM Conflict

January 01, 2001

A 7-year-old warmblood stallion from Germany is at the center of a storm of controversy after testing positive for contagious equine metritis (CEM) upon importation to Canada. The horse, appropriately named What’s Going On, had tested negative for... Read More


CEM -- A Continuing Threat to International Trade

January 01, 2001

"Since its discovery in 1977, contagious equine metritis (CEM) has been a source of considerable concern for many countries because of the ease with which it can be spread internationally through carrier stallions or mares," said Peter Timoney,... Read More


USDA Amends Regulations on Horses From Spain

November 27, 2000

The U.S. Department of Agriculture is amending the requirements for health certificates accompanying imported Spanish pure breed horses from Spain which specify whether or not the horses were raised on breeding premises.

Instead, APHIS... Read More