Von Magnus phenomenon?
When passaged serially in eggs,using as inocula undiluted infected allantoic fluid,the progeny virus will show high hemagglutinin titres ,but low infectivity. This has been called the Von Magnus Phenomenon and is due to the formation of incomplete virus paicles lacking nucleic acid. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO.500
Is a normal replicative cycle
Virus yield has low hemagglutination
Virus high infectivity
Virus yields has high hemagglutination titre but low infectivity
Virology