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Hemagglutination and Hemagglutination Inhibition by Normal Serum with a Canary Pox Virus Strain¹

From the Naval Biological Laboratory, School of Public Health, University of California, Berkeley, California

Abstract

A strain of canary pox virus (CPV) agglutinated red blood cells from only one-fourth of the fowl donors furnishing cells positive for hemagglutination by vaccinia virus. Hemagglutination was inhibited by normal fowl, sheep, rabbit and horse serum. Inhibition titers were inversely proportional to the virus concentration employed and were not affected by incubation at 4, 26, or 37°C. When heated at 56°C for 30 min the hemaggluatinin was thermolabile, the serum inhibitor thermostable. The virus showed no enzymatic activity against red cell receptors or against the serum inhibitor. In these aspects, this CPV strain is identical neither with other pox viruses nor with the MNI viruses.

Footnotes

¹ This work was sponsored by the Office of Naval Research, U. S. Navy and the Bureau of Medicine and Surgery, U. S. Navy, under a contract between the Office of Naval Research and the Regents of the University of California.

² Opinions expressed in this report are not to be construed as reflecting the views of the Navy Department or of the naval service at large (Article 1252, U. S. Navy Regulations, 1948). Reproduction in whole or in part is permitted for any purpose of the United States Government.