Lab technician Paula Matney suits up before she enters a chicken coop last year at the Sacramento-Yolo Mosquito and Vector Control District in Elk Grove, Calif. Sacramento-Yolo mosquito officials keep coops of chickens that are regularly tested for West Nile virus.
Lab technician Paula Matney suits up before she enters a chicken coop last year at the Sacramento-Yolo Mosquito and Vector Control District in Elk Grove, Calif. Sacramento-Yolo mosquito officials keep coops of chickens that are regularly tested for West Nile virus. Randy Pench Sacramento Bee file
Lab technician Paula Matney suits up before she enters a chicken coop last year at the Sacramento-Yolo Mosquito and Vector Control District in Elk Grove, Calif. Sacramento-Yolo mosquito officials keep coops of chickens that are regularly tested for West Nile virus. Randy Pench Sacramento Bee file