KAZINYONE, Zambia — Joba Edwards spends the night outside in a tee-shirt and shorts, with a flashlight in hand, waiting for mosquitoes to bite him. When they do, he catches the bugs by sucking through the tube on a mouth aspirator, which traps them. He then funnels the mosquitoes into a Styrofoam cup, covered with a net. He has twelve of these cups, each marked by pen with a different hour of the night. Edwards sits on a wooden stool doing this from 6 p.m. to 6 a.m., five nights per month.