Health officials say tests have confirmed that peanut butter made from peanuts processed at a Texas plant contains the same strain of salmonella blamed for sickening hundreds in a national outbreak. The test results offer new evidence that the outbreak attributed to a peanut plant in Georgia may have more than one origin. Both the Texas plant and the Georgia plant were operated by Peanut Corp. of America, which filed for bankruptcy amid fallout from the outbreak that also may have contributed to nine deaths. Federal authorities have launched a criminal investigation into allegations the company knowingly shipped tainted food.