Three organ transplant patients who developed mold infections before dying at the University of Pittsburgh Medical Center likely breathed in the mold spores, the U.S. Centers for Disease Control and Prevention said. CDC officials determined that although those patients appeared to have had skin contact with the mold, a more careful review of their medical records indicates they developed pneumonia, the Pittsburgh Post-Gazette reported Friday. That's important because the hospital network had focused on bed linens as a possible mold source, though that's yet to be determined. As a precaution, the medical center began wrapping linens in plastic until they are used in the cardiothoracic intensive care unit at UPMC Presbyterian hospital and may continue doing so, despite the CDC findings.