Dog heartworm has been found in Seal Beach mosquitoes
OC VECTOR CONTROL
The Orange County Mosquito and Vector Control District (OCMVCD) has confirmed two mosquito species collected in 2021 tested positive for dog heartworm (Dirofilaria immitis).
In 2021, the OCMVCD laboratory expanded testing capabilities to include mosquito sample screening for dog heartworm. Due to this new testing process, these are the first positive dog heartworm mosquitoes


