The strain was isolated from a patient in North Queensland and described as a new serovar named valbuzzi (Smith, Brown, 1955). The serovar represented by strain Valbuzzi is included in the list of 1967 (WHO, 1967) with the footnote: provisional classification pending further work.
Babudieri considered the strain to be identical to Moskva V. However Dikken found certain differences which were supported by Kokovin (1970).
The strain was submitted to factor analysis which confirmed its separate status (Kmety, Lataste-Dorolle, 1973).