The use of filter paper discs in collection of blood specimens for serological studies.
D000818:Animals; D001800:Blood Specimen Collection / Q000662:veterinary*; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis; D005374:Filtration; D009500:Neutralization Tests / Q000662:veterinary; D012698:Serologic Tests / Q000662:veterinary*