Average expression signal intensity of integrins and fibronectin in the tissues of two infected and three non-infected animals.

MCS: metacarpal skin; LNG: lung; NTE: nasal turbinate epithelium; PIS: persistent infection site; SRS: secondary replication site; -c: not infected; -i: FMDV infected;*statistically significantly different between SRS and the rests;**the sum of the signal intensity of ITGB1-binding integrin α subunits (ITGAs) or RGD-binding integrin β subunits (ITGBs) according to cited reference [27]; and ***: estimated level of integrin αVβ6 heterodimeric receptor.