“…At 0, 6, 12, 24, 36 48, 60, 72 and 84 h after challenge experiment, tissue from the liver, head kidney, spleen, thymus, gut, muscle, gill, skin, heart, mid-kidney and brain were collected from the control and challenged groups. Fish were euthanized with an overdose of MS-222 before tissue collection, as reported previously by Zhang et al (2012).…”