Abstract
The livers of mice of different ages were readily damaged by Coxsackie virus B1 infection. The severity of liver damage decreased as the age of the mice increased. Coxsackie B1 viral crystals were not found in the damaged liver cells in spite of severe pathological changes of the liver, both histologically and electron microscopically, and even though characteristic crystal formation was observed in the pancreas of three of these same animals. Nevertheless, the hepatic damage was considered to be due to direct viral invasion of the hepatic cells. This injury was followed by a variety of degenerative and necrotic processes displaying somewhat characteristic morphological manifestations. The severe hepatic infection produced in the newborn mice resulted in their death from a rather fulminating illness, whereas in the older mice there was recovery from mild to moderate hepatic injury with cellular regeneration by the fourth day after viral inoculation. The experimental preparation used here provides an excellent means for the study of the processes of injury and healing of the liver infected with a virus that is also infectious for man.
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