During the early stage of infection (1–6 h post-infection [p.i.]), except for that of Hse1 changing slightly, the transcript levels of other components were significantly up-regulated at 1 h p.i. (Vps27), 1–3 h p.i. (Vta1), 1–6 h p.i. (Vps22), or 3–6 h p.i. (Vps25 and Vps36). This evidence concerns the gene HPSE and infection.