| comparative studies on three isolates of breda virus of calves. | three isolates of breda virus of calves were compared morphologically and antigenically. the isolates demonstrated similar morphology and shared common antigens, as determined by enzyme-linked immunosorbent assay and immunoelectron microscopy. on the basis of results of the hemagglutination-inhibition test, enzyme-linked immunosorbent assay, and immunoelectron microscopy, the 3 isolates were further subdivided into 2 serotypes: serotype 1 (breda virus 1) represented by the iowa isolate 1; and se ... | 1985 | 2408519 |