Fig. 3
From: In vivo antiviral effect of plant essential oils against avian infectious bronchitis virus
Effects of PEO on organ indices in chicks on days 2 and 5 drug withdrawal. A Spleen index. B Thymus index. C Bursa of Fabricius index. Sample quantity n = 5; compared with the blank control group, the challenge control group showed # p < 0.05, ## p < 0.01; compared with the challenge control group, the prevention and drug groups (positive drug and different doses of PEO) showed *p < 0.05, ** p < 0.01. Different superscript letters indicated significant differences (p < 0.05)