The strain was isolated from an armadillo (Choetophractus villosus) in Argentina in 1963 and was described as a new serovar of the Batavije group y Szyfres et al. (1967).
The serovar represented by this strain was included in the list of recognized serovars of 1967 (WHO, 1967), under the strain designation LT 1019 (laboratory code number). This has now been replaced by the name Peludo as given in the original publication.