A new study to be published in next month's issue of the journal Environmental Health Perspectives found that DNA from antibiotic-resistant bacteria in Texan cattle have become airborne. The DNA could then spread to humans and make the treatment of infections more difficult. The study authors, who are environmental toxicology researchers at Texas Tech University, believe the bacteria may be capable of staying airborne for long periods of time and traveling significant distances, Time reports. The researchers studied airborne particulate matter from 10 cattle feedlots in Texas over a six-month period.