Pen-Based Swine Oral Fluid Samples Contain Both Environmental and Pig-Derived Targets. - Tarasiuk G; Remmenga MD; O'Hara KC; Talbert MK; Rotolo ML; Zaabel P; Zhang D; Giménez-Lirola LG; Zimmerman JJ (Animals : an open access journal from MDPI, 2024)