I know the word to be for human children but Hess writes in 1971:
"Others reported substantial attenuation after 100 passages in rabbits (MENDES, 1962). Another attenuated lapinized strain of ASF virus recovered it&initial virulence when passaged a number of times in pigs (SANCHEZ BoTIJA, 1962).
Russian investigators (KovALENKO et al., 1965) have shown that kids 4 to 5 months old could be infected with ASF virus by intraperitoneal inoculation of infected blood. The animals developed symptoms in 6 to 25 days and one kid died after 36 days. Virus was found in the blood 6 days after infection but was no longer present after 30 days. It was present in the spleen after 36 days but not after 70 days. The disease was characterized by hyperthermia, diarrhea, severe emaciation and by lesions in the reticuloendothelial system. The virus was passaged 19 times in kids and appeared to adapt progressively to these animals causing damage to the reticuloendothelial system and accumulating in the spleen [1]."
1. Hess, W.R. African Swine Fever Virus. Virol. Monogr. Virusforsch. Einzeldarst. 1971, 9, 1–33, doi:10.1007/978-3-7091-3987-5_1.
I searched through the internet but in vain. Also, I could not find the article of Kovalenko, either in English or Russian.
Thank you in advance