Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Letter Nanotubes, Carbon Nucleic Acids Photosynthetic Reaction Center Complex Proteins RNA, Viral Reagent Kits, Diagnostic bovine herpesvirus type 1 distribution genotype intraspecific diversity nucleic acid extraction kit physiology polymerase chain reaction porcine circovirus type 2 porcine epidemic diarrhea virus porcine rotavirus type A pseudo-nitzschia pungens