RESUMEN
An outbreak of reovirus infection with high mortality in two groups of recently imported psittacine birds is reported. The disease in the two species involved, African grey parrots (Psittacus erithacus erithacus) and Australian king parrots (Alisterus scapularis), had differences in clinical presentation and gross lesions. Reovirus particles were observed by electron microscopy and ultrastructural examination of tissues, and two viruses were isolated in cell culture, one from each bird species. Both isolates were studied by cross-neutralization with antisera against reference avian reoviruses isolated from chickens and parrots, and were found to have the greatest similarity to viruses isolated from a budgerigar and a southern screamer.
RESUMEN
The small-subunit (SSU) rDNA of the Neospora sp. NC-PV1 strain isolated in Italy from cattle has been sequenced and compared to the other five N. caninum strains SSU rDNA sequences deposited in the data bases. The NC-PV1 strain sequence is identical to three published sequences. Minor differences, respectively four nucleotide bases and one nucleotide base, have been found when comparing the NC-PV1 sequence with two other available sequences of N. caninum. According to these results, the Neospora sp. NC-PV1 strain is assigned to the species N. caninum.
