LITTLE ROCK, Ark. (AP) - Arkansas livestock officials are to start testing cattle for a sexually-transmitted disease that can cause heifers to spontaneously abort.

The Arkansas Livestock and Poultry Commission approved the regulation on June 2, and testing is to begin Wednesday.

The requirement will be in effect for 120 days. The commission will then review whether the regulation has been effective.

Testing for bovine trichomoniasis is mandatory for bulls being sold or leased within the state. Any animals that test positive have to be slaughtered.

Bulls don't show symptoms of the disease, and the commission says it doesn't affect the quality or safety of the meat. But the disease is a danger to the state's $1.4 billion cattle industry because of the danger it poses to unborn calves.

Copyright 2011 The Associated Press.