The District laboratory currently collaborates with the Stanford
Division of Pediatric Infectious Disease to test mosquito samples
collected internationally for diseases such as chikungunya and
While not currently transmitted in San Mateo County, a mosquito
that has the potential to transmit them – invasive Aedes
aegypti – has been detected in the county since 2014,
and travel-acquired cases of chikungunya and dengue are common.
The District’s collaboration with Stanford Division of
Pediatric Infectious Disease helps us prepare for the possibility
of local transmission in the future.