EL CAJON, Calif. (KGTV) - Genevieve Garcia feels like she's been eaten alive, bitten hundreds of times by an insect over the past six weeks.
When 10News visited her Friday, she showed us about 50 bites, mostly on her legs and feet.
County Vector Control recently paid her a visit and told her she's being bitten by the Yellow Fever mosquito.
They migrated to the area about 2 years ago from Mexico, can transmit Zika virus - and generally fly low, so they're rarely seen.
"I'll wake up in the middle of the night itching and scratching, and I've got welts all over me," said Garcia.
County scientists say the mosquitoes can breed in as little as a thimble of standing water.
While the mosquito has been reported all over the county, they tell us the main breeding area has moved from below Interstate 8 to below Highway 52 - and it continues to expand north.