The tissue material meant for virological examination may in some cases have to be accompanied by supplementary material for bacteriological, parasitological, histological or other examination to allow for a differential diagnosis.
Tkivo, namenjeno za virološko preiskavo, lahko v nekaterih primerih spremlja dodatni material za bakteriološko, parazitološko, histološko ali kakšno drugo preiskavo, da se omogoči postavitev drugačne diagnoze.