| APP | acute phase protein; alum-precipitated pyridine; aminopyrazolopyrimidine; amyloid peptide precursor;... |
|---|---|
| ARV | acquired immunodeficiency syndrome-related virus; anterior right ventricle; avian reovirus |
| ASV | anodic stripping voltammetry; antisiphon valve; antisnake venom; avian sarcoma virus |
| ATV | Abelson virus transformed; avian tumor virus |
| ECAO | enteric cytopathogenic avian orphan [virus] |