Glutamate-Aspartate Transaminase Activity in the Blood Plasma of an Insect during the Course of Two Viral Diseases

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Abstract
Glutamate-aspartate transaminase was assayed in the blood plasma of the noctuid larva Peridroma saucia (Hübner) during the course of nucleopolyhedrosis and granulosis. The blood-plasma transaminase activity was measured in LaDue-Wróblewski-Karmen units. In larvae with nucleopolyhedrosis, the activity of this enzyme was significantly elevated at the fourth and subsequent days after peroral inoculation with the virus. During the course of granulosis, the elevation was less marked: the first statistically significant increase was detected only at the fifth clay postinoculation. These differences in hyperenzymemia appear to be the result of dissimilar cytocidal activities of the two viruses concerned.

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