two agents isolated in 1953 from patients in epidemics of meningo-encephalitis in slovenia and austria were examined in neutralization tests at the army medical service graduate school in washington , d.c. , usa , and were found to be indistinguishable under the conditions of test from the agents called russian spring-summer encephalitis virus , czech encephalitis virus , or louping-ill virus , which are believed at the present time to be strains of the same agent .
C0043038
washington
C0041703
usa