SAN ANTONIO (AP) — A fourth case of chronic wasting disease has been confirmed in deer in South Texas.

The San Antonio Express-News reported Friday that the latest infected deer was raised in Medina County at the same ranch as the other three animals. That’s prompted an increase in testing of both captive-bred and hunter-harvested deer.

New rules that take effect Aug. 24 establish conditions that must be met before breeders, most of whom have been banned from shipping deer since July, can sell or transport deer in advance of hunting season. The season starts in October.

CWD affects the brains and nervous systems of animals and isn’t considered a threat to human health.

Texas is limiting release of captive-raised deer to properties enclosed by high fencing to protect against spreading the disease.