ITGA2B and infection: Consistently, the expression of both cd4-1 and cd4-2.1 was induced upon infection (P=0.004 and P=0.0002, respectively), whereas their expression was reduced following dexamethasone treatment: cd4-1 was suppressed following reactivation (P=0.0002) (Fig. 4C), and cd4-2.1 was reduced in both uninfected (P=0.02) and infected (P=0.088) fish (Fig. 4D).