Context o.p.B. oB/o.B = NAD
unauffällig = unremarkableo.b.B.
may be veterinary use but as it means that nothing has been detected that isn't within normal limits (and therefore not worth reporting), NAD still applies.
The examples given by karink are on clinical examination (Darmperistaltik: o.B. oder Nabel (Umbilicus): o.B.
) and you are far more likely to find NAD written in someone's clinical notes.
When a case is written up for publication, for example, the case report doesn't usually contain acronyms but rather proper words like "unremarkable" or "within normal limits" or simply "normal".
Radiology reports, such as in Bob's unremarckable [sic] second link, are also less likely to contain o.p.B.
/NAD and more likely to say unaufällig
/unremarkable.related discussion: unauffällig