PAX7 and Pythiosis: Sera from all six pythiosis subjects (HuP1–3 and HsP1–3) and the PiCFA-immunized rabbit (RbCFA) reacted with multiple proteins of PiCFA (15–120 kDa), including some prominent bands (15, 25, 37, 40–50, 55, 60, 65, 70, 75, and 120 kDa) (Figure 3A).