sau passaging
verbul to passage, subst. passage sau passaging
*passage* - transplantare, reînsămânţare (la culturi), cf. dicţ. medical engl.-rom.

Dorland's Medical Dictionary, de la www.mercksource.com
passage (pas·sage) 3. introduction of infectious material into an experimental animal or culture medium, followed by recovery of the infectious agent.

blind passage, successive transfer of infection through experimental animals, chick embryo, or tissue culture, when overt lesions of disease are not apparent, at least in the earlier members of the series.

serial passage, the successive transfer of a virus or other infectious agent through a series of experimental animals, tissue culture, or synthetic media, with growth occurring in each medium. The process is usually used to attenuate a pathogenic agent.

Cred că despre asta este vorba.