Bacteriophage contamination in calf sera collected by different methods from various sources.
D000818:Animals; D001435:Bacteriophages / Q000302:isolation & purification*; D002417:Cattle; D003090:Coliphages / Q000302:isolation & purification; D004340:Drug Contamination; D005312:Fetal Blood / Q000382:microbiology*; D011549:Pseudomonas; D012760:Shigella; D010948:Viral Plaque Assay