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Image Number K5439-20 At the Rio Grande, Robert Rodriguez (left) and Horico Garza, of USDA's Animal and Plant Health Inspection Service, search for livestock that may be carrying ticks. Cattle fever ticks have been eradicated from this country since 1943 except for a narrow strip along the border. Photo by Scott Bauer.  640 pixels wide: (k5439-20.jpg)   Please visit our Image Gallery


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