Date of Award:

5-1-1981

Document Type:

Thesis

Degree Name:

Master of Science (MS)

Department:

Biology

Department name when degree awarded

Life Sciences:Biology

Committee Chair(s)

Rex S. Spendlove

Committee

Rex S. Spendlove

Committee

Nabil N. Youseff

Committee

Bill B. Barnett

Committee

Scott M. Clark

Abstract

The purpose of this study was to describe some of the ultrastructural events which occur in Madin-Darby bovine kidney cells infected with bovine rotavirus. Several observations were made in this study which have not been previously reported. First, distension of the rough endoplasmic reticulum cisternae was observed to occur before the entry of virus particles. Second, an increase in ribosome-like particles in the cytoplasm was seen to occur. Third, bundles of microfilaments were often seen near the nuclear envelope, mitochondria, and the rough endoplasmic reticulum. Fourth, two different densities of viroplasm were observed. Fifth, progeny virus particles were observed in distended portions of the nuclear envelope. Sixth, three filaments were seen to trail assembling progeny virus as they gained entry into the cisternae of the rough endoplasmic reticulum. Seventh, a five-point symmetry was observed in the center of assembling virions. Eighth, Virus particles were observed to become associated with the outer mitochondrial membrane, assemble and enter the mitochondria in a similar fashion to virus particles which assemble at the rough endoplasmic reticulum membranes. Ninth, another mode of progeny virus release was observed.

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