At the end of 1999 symptoms resembling the "post-weaning multisystemic wast
ing syndrome" (PMWS) were mentioned in the field. This article describes th
ree cases in which the clinical symptoms could be confirmed by histopatholo
gy In two cases electron microscopic examination revealed the presence of s
mall aggregates of virus-like particles that were circular and they had a d
iameter of 14 to 17 nm. In the third case, virological examination demonstr
ated the presence of porcine circovirus (PCV) type 2. The clinical and (his
to)pathological findings and the discussion about this syndrome and its eti
ology are briefly described to focus the attention of the practitioner.