Sup.was completing daily paperwork inside the site office trailer when he believes that he was bitten by a mosquito.He did not report the incident that day. On 4/30,he arrived at work, the lt.side of his face was noticeably swollen, an area appeared to be infected.He ind.that he tried to""lance""that area with his pocketknife while at home.EE seen a phys. who admin.IV antibiotics.