Agriculture officials are concerned that the New World screwworm may return to the US as detections in Mexico indicate northward movement of the pest that could devastate livestock (AP, CBS News, APHIS - New World Screwworm, Oklahoma State University). For the purposes of this question, "livestock" means any single domesticated mammal raised to produce food or other goods that is present in Texas. The question will close as of the announcement, irrespective of when the infestation is believed to have begun.

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