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The ticks cause what's known as Texas Cattle Fever, which results in slow or low growth, reduced reproduction ability and death. In the past, the illness has spread among cattle beyond Texas and into parts of the Midwest, East Coast and even California.
Any infestation that reaches American herds would require an expensive process in which animals are walked through a pesticide bath like one the Mexican cattle are immersed in at the Laredo inspection station before they head to U.S. feedlots. A rancher with infected cattle would have to dip his entire herd from the pasture where the infected animal grazed -- a process repeated every two weeks for nine months -- at a cost of at least $150 per head.
"All that is lost money," said Ty Keeling, a rancher from Pleasanton, about a half-hour drive south of San Antonio.
Keeling, 30, gets his cattle from Mexico but no longer travels there for safety reasons. He understands why the inspections were being moved to Texas but fears state and federal budget cuts could lead to reduced inspections.
"It's a national issue if not controlled at the border," Keeling said. "If you had an outbreak that covered the whole southern part of the United States, that would eliminate a lot of cattle numbers -- and drive up the price of beef."
At the Laredo site, Gutierrez's inspection includes scratching each animal's hide to check for a tick infestation, a seemingly innocuous exercise that turns dicey as he sticks his arm between the steel bars of a narrow chute to get his hand on a clearly unhappy steer.
If the animal bucks, the doctor's arm could be snapped between the bars and the animal. A quick move by the steer means Gutierrez must be quicker to jerk his arm back out of harm's way.
"I've just been lucky," he said of avoiding injury. "It's not a question of if, but when."
Before shipment to the United States, animals are scrutinized by Mexican authorities, who mark the truck with a numbered seal that's matched to paperwork accompanying the animals once they reach the Laredo inspection, Avalos said.
On this day, it's apparent the animals have been seen by the Mexican agricultural inspectors, Gutierrez said. Only one is returned, for a faulty castration.
"This cattle is coming in pretty clean," said Gutierrez, his shirt and hat now spotted with cattle excretions. "They do the best they can."
[Associated
Press;
Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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