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No common antigenic determinants and no DNA sequence homologies were detected when three animal viruses, chicken anaemia agent (CAA), porcine circovirus (PCV), and psittacine beak and feather disease virus (PBFDV), all of which possess circular single-stranded DNA genomes, were compared. Negative contrast electron microscopy showed that PCV and PBFDV(More)
Circoviruses are small, nonenveloped icosahedral animal viruses characterized by circular single-stranded DNA genomes. Their genomes are the smallest possessed by animal viruses. Infections with circoviruses, which can lead to economically important diseases, frequently result in virus-induced damage to lymphoid tissue and immunosuppression. Within the(More)
We examine hypotheses for the neural basis of the profile of visual cognition in young children with Williams syndrome (WS). These are:(a)that it is a consequence of anomalies in sensory visual processing,(b)that it is a de.cit of the dorsal relative to the ventral cortical stream,(c)that it reflects de.cit of frontal function, in particular of(More)
One of the first attempts to develop a formal model of depth cue integration is to be found in Maloney and Landy's [(1989) Proceedings of the SPIE: Visual communications and image processing, Part 2 (pp. 1154-1163)] "human depth combination rule". They advocate that the combination of depth cues by the visual system is best described by a weighted linear(More)
Chicken anemia virus (CAV) causes cytopathogenic effects in chicken thymocytes and cultured transformed mononuclear cells via apoptosis. Early after infection of chicken mononuclear cells, the CAV-encoded protein VP3 exhibits a finely granular distribution within the nucleus. At a later stage after infection, VP3 forms aggregates. At this point, the cell(More)
Rhabdovirus was isolated from wild common bream Abramis brama during a disease outbreak with high mortality in Northern Ireland during May 1998. Rhabdovirus was also isolated at the same time from healthy farmed rainbow Oncorhynchus mykiss and brown trout Salmo trutta on the same stretch of river and 11 mo later from healthy wild bream and roach Rutilus(More)
Antisera raised against oriented peptide conjugates were used to identify and partially characterize a 24 kDa protein product expressed by chicken anaemia virus (CAV). The peptides derived from the N and C termini of the protein were shown to react against the native protein, expressed within virus-infected cells, by immunofluorescence, immunoperoxidase and(More)
The replication of four fowl adenovirus strains (FAV-1, strain Phelps; FAV-5, strains 340 and TR-22; and FAV-7, strain YR-36), in primary chick kidney cell cultures, is described. Differences were found in the distribution of virus particles and virus associated inclusions between viruses belonging to different cytopathology subgroups. Thus in cells(More)
Rotavirus particles were demonstrated by electron microscopy in the feces of lambs with diarrhea. Rotavirus antigen was synthesized in cell cultures infected with filtrates of the diarrheic feces, but the virus was not adapted to grow serially in cell cultures. An antigenic relationship between rotaviruses from lambs, pigs, and calves was demonstrated by(More)