Antiviral Substances to the Virus of Encephalitis (St. Louis Type) in Serums Collected in California

Summary

Of 29 serums from patients diagnosed as having had acute encephalitis or a polio-encephalitis, respectively, in one region of California none neutralized the virus of lymphocytic choriomeningitis, while 16 or 55.1% gave a positive test with the St. Louis type of encephalitic virus.

Appreciation is extended to Dr. E. R. Zumwalt and his staff at Tulare, to Dr. H. M. Ginsburg and the group at Fresno for their kind coöperation and the many courtesies offered and to Dr. C. Hawley for the collection of many of the serums.