| isolates of sarcocystis falcatula-like organisms from south american opossums didelphis marsupialis and didelphis albiventris from são paulo, brazil. | isolates of sarcocystis falcatula-like organisms from south american opossums were characterized based on biological and morphological criteria. sporocysts from intestinal scrapings of 1 didelphis marsupialis and 8 didelphis albiventris from são paulo, brazil, were fed to captive budgerigars (melopsittacus undulatus). budgerigars fed sporocysts from all 9 isolates became ill and s. falcatula-like schizonts were identified in sections of their lungs by immunohistochemical staining. sarcocystis fa ... | 2001 | 11780836 |