Mosquito Surveillance

Overview

How to Interpret Mosquito Surveillance Data

Mosquito surveillance data reports the abundance of various species of mosquitoes in San Mateo County.

Different mosquito species have different seasonal life cycles, bite different hosts at different times of day, and transmit different diseases. It’s important for District staff to know what mosquito species are present in order to minimize annoyance and, more importantly, disease risk to humans and domestic animals.

These graphs track the number of mosquitoes of each species (vertical axis) by month (horizontal axis). These are frequently compared to a five-year average of each mosquito species by month, allowing staff to determine whether we have more, less, or about the same mosquito populations as most years.

For more information about how the District traps mosquitoes for disease and population surveillance, see Mosquito Trapping and Pools.

Post

CO2 Traps
July and August 2017, and Year to Date

The table shows the proportions of common mosquitoes in San Mateo County that were collected in carbon dioxide baited traps in July and August 2017 compared with the five-year average during July and August

Species

July 2017

Post

CO2 Traps
June 2017 and Year to Date

The table shows the proportions of common mosquitoes in San Mateo County that were collected in carbon dioxide baited traps in June 2017 compared with the five-year average during June.

Species

June 2017

5-year June average

Post

CO2 traps
May 2017 and Year to Date

The table shows the proportions of common mosquitoes in San Mateo County that were collected in carbon dioxide baited traps in May 2017 compared with the five-year average during May.

Species

May 2017

5-year May average

Post

CO2 Traps
April 2017

The table shows the proportions of common mosquitoes in San Mateo County that were collected in carbon dioxide baited traps in April 2017 compared with the five-year average during April.

 

Post

New Jersey Light Traps
2017 YTD

This graph shows the monthly numbers of Culiseta and Culex mosquitoes collected by New Jersey light traps in San Mateo County thus far in 2017.

Post

CO2 Traps
March 2017

The table shows the proportions of common mosquitoes in San Mateo County that were collected in carbon dioxide baited traps in March 2017 compared with the five-year average during March.

Post

CO2 Traps – February 2017
Proportion of Adult Mosquitoes Species Collected

The graph shows the proportions of common winter mosquitoes in San Mateo County that were collected in carbon dioxide baited traps in February.

Post

CO2 traps
March - December, 2016

The graphic below shows the average number of mosquitoes per trap collected each night in CO2 traps.  It includes common species found in San Mateo County.

Post

New Jersey Light Traps
2016 - Complete Year

This graph shows the monthly numbers of Culiseta and Culex mosquitoes collected by New Jersey light traps in San Mateo County for the entire year of 2016.

Post

New Jersey Light Traps
YTD November 2016

The graphic to the left shows the number of mosquitoes of genus Culex and Culiseta found in our New Jersey light traps in April 2016. 

Post

Year to date CO2 trap results
November, 2016

The graphic below shows the number of common mosquito species found in our CO2 mosquito traps so far in 2016. 

Post

Mosquito Surveillance
New Jersey Light Traps

Collections of Culex and Culiseta mosquitoes from four New Jersey Light Traps in San Mateo County.  

August data does not include the entire month because the traps were being serviced for part of the collection period.

Post

Mosquito Surveillance
Carbon dioxide baited traps

Monthly abundances of five common mosquito species in San Mateo County, Aedes dorsalis, the summer salt marsh mosquito, Culex erythrothorax, the tule mosquito, Culex pipiens, the northern house mosquito, Culex tarsalis, the western encephalitis mosquito, and Culiseta incidens, the cool weather mosquito.

Click on the graphic below to see the population fluctuation this spring and summer.

Post

Mosquito Surveillance Results, August 2016

Mosquito surveillance data from August 2016 is in. You can see how this year’s mosquito populations stack up against the 5-year average by clicking the graphic below.

 

Post

Year-to-Date CO2 Mosquito Trap Results, August 2016

The graphic below shows the number of each mosquito species found in our CO2 mosquito traps so far in 2016. Find out more about our mosquito surveillance program.

Post

CO2 Mosquito Trap Results, June 2016

The graphic to the left shows the number of each mosquito species found in our CO2 mosquito traps in June 2016. Find out more about our mosquito surveillance program.

Post

Mosquito Larval Surveillance Results, April 2016

Mosquito larval surveillance data from April 2016 is in. You can see the average number of mosquito larvae per sample (“dip”) for the various areas of the county on the graph below.

Post

New Jersey Light Trap Results, April 2016

The graphic to the left shows the number of each mosquito species found in our New Jersey light traps in April 2016. Find out more about our mosquito surveillance program.

February 2016 CO2 Trap Results
Post

Mosquito Surveillance Results, February 2016

Mosquito surveillance data from February 2016 is in. You can see how this year’s mosquito populations stack up against the 5-year average by clicking the graphic to the left.

Post

New Jersey Light Trap Results, 2015
Year-End Data

The graphic to the left shows the number of each mosquito species found in our New Jersey light traps in 2015. Find out more about our mosquito surveillance program.

Commands