Background: The refolding of proteins from inclusion bodies is affected by several factors, including solubilization of inclusion bodies by denaturants, removal of the denaturant, and assistance of refolding by small molecule additives. Objectives: The purpose of this study was optimization of recombinant human interferon-b purification in order to achieve higher efficiency, yield, and a produ...

An epizootiological survey with histopathological methods was conducted for porcine circovirus in 220 diseased pigs (1-200 days old) in 49 farms from 1985 to 1999. Histopathological lesions containing PCV antigen were detected mainly in the lymphoid tissues from 42 of 189 diseased pigs (22.2%) in 4 of 45 farms (8.9%) from 1990 to 1999. The rate of positive pigs gradually increased from 1997 onw...

Background: Hexachlorobutadiene (HCBD), a potent nephrotoxin can cause degeneration and necrosis in renal tubular epithelial cells in rodents. Its toxicity is due to conjugation with glutathione to form the related cysteine conjugate. This metabolite is then taken up by the kidney and cleared through renal tubular epithelial cells as a reactive thiol derivative by the enzyme β-lyase. Objective:...

The pathology of the nervous system in equine encephalomyelitis has been described for both the Western (1) and the Eastern (2) forms of the disease. Much attention has been paid to the intranuclear inclusion bodies, found in glial and mesodermal cells as well as in neurones. The intense inflammation, together with the necrosis of nerve cells, has been reported. I t is the purpose of this paper...

Wesselsbron disease (WSL) was diagnosed in a 2-d-old lamb on a farm in the north-eastern Free State Province where a few abortions and neonatal deaths occurred in sheep in April 1994. The liver of the lamb was slightly swollen and orange-brown and, microscopically, it revealed single or small groups of necrotic hepatocytes that were randomly scattered throughout the lobules. Other histopatholog...

An approximately 1-year-old domestic rabbit showed severe neurologic signs with circling and turning somersaults. Histologically, a nonsuppurative meningoencephalitis with neuronal cell necrosis and numerous intranuclear inclusion bodies in neurons and glial cells was found. Electron microscopic examination revealed herpesvirus particles in affected cells. A human herpes simplex virus was ident...

In this report, particular attention is paid to the inclusion bodies found in the apical cytoplasm of the pigment epithelial cell. These bodies are of variable size and form. The smallest (0.4 micro diameter) consist of a granular matrix enclosed by a single membrane, and are similar to the lysosomes of hepatic cells. Larger inclusion bodies contain areas of lamellated material in addition to g...

This report describes the naturally occurring atypical neuropathological manifestation of systemic canine distemper virus (CDV) infection in two 16-day-old Pit Bull pups. CDV-induced changes affected the gray and white matter of the forebrain while sparing the hindbrain. Histologically, there was necrosis with destruction of the nervous parenchyma due to an influx of inflammatory and reactive c...

glomerular development of the kidney was studied in newborn rats by electron microscopy. four different stages of glomerular development were defined: vesicle fonnation, s-shaped body stage, capillary loop fonnation, and glomerular maturation. in the fust stage, the mesenchymal cells form a spheroid mass. this is followed by the s-shaped body stage in which clefts appear in the mass. afterwards...

Mammalian cell cytoplasmic RNA stress granules are induced during various conditions of stress and are strongly associated with regulation of host mRNA translation. Several viruses induce stress granules during the course of infection, but the exact function of these structures during virus replication is not well understood. In this study, we showed that respiratory syncytial virus (RSV) induc...