English to Norwegian Other Fisheries Fisheries / vaccinatione

2 trials involved confirmation of the optimal dose rate by challenge with A. salmonicida or V. salmonicida

During the trials, the fish were challenged with A. salmonicida

Except in trial 2 (a severe challenge trial), palatability of the medicated feed was excellent

Jeg har funnet definisjonen under på dictionary.com, men har problemer med å finne rett norsk ord:
to expose an organism to a specific substance in order to assess its physiological or immunological activity