Design of an oral vaccine using Lactococcus lactis against brucellosis: an in vitro and in vivo study

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Table 2 Survival percentage, spleen weight and clinical indicators of each group

0 (normal, active, healthy), − 1 (slightly sick, slightly ruffled fur, otherwise normal), − 2 (ill, ruffled fur, sluggish movement, hunching), − 3 (extremely sick, ruffled hair, very slow movement, stooped, eyes shut), − 4 (moribund), and − 5 (dead)