Three substrains with different hemagglutination patterns isolated from a Japanese lentogenic strain of Newcastle...

Three substrains were cloned from chick kidney cell monolayers infected with the Ishii strain of lentogenic Newcastle disease virus isolated in Japan. These substrains, which differed in plaque morphology, were distinguished as having no +24R+ and -24R- patterns in the hemagglutination (HA)-elution test.