Weber Mosquito Abatement District

  505 West 12th Street

 Ogden, Utah 84404

(801) 392-1630


2017 Mosquito Surveillance



Weekly Reports




Week #15 (Apr 10-14)




Week #16 (Apr 17-21) - no collections




Week #17 (Apr 24-28) - no collections




Week #18 (May 1-5)




Week #19 (May 8-12)




Week #20 (May 15-19)




Week #21 (May 22-26)




Week #22 (May 29 - Jun 2)




Week #23 (Jun 5-9)




Week #24 (Jun 12-16)




Week #25 (Jun 19-23)




Week #26 (Jun 26-30)




Week #27 (Jul 3-7)




Week #28 (Jul 10-14)




Week #29 (Jul 17-21) - 1 WNV positive




Week #30 (Jul 24-28) - 1 WNV positive




Week #31 (Jul 31-Aug 4) - 3 WNV positives




Week #32 (Aug 7-11)




Week #33 (Aug 14-18) - 2 WNV positives




Week #34 (Aug 21-25)




Week #35 (Aug 28-Sep 1) - 2 WNV positives




Week #36 (Sep 4-8) - 6 WNV positives































































View 2016 Mosquito Surveillance



View 2015 Mosquito Surveillance

Trap collections begin in mid April and end in mid October. Testing for WNV on Culex tarsalis and Culex pipiens species begins in June and ends in October. Each weekly trap site collection and summary will be available for viewing on the website the following Monday.


A new form of surveillance will also begin in 2017  with the addition of BG Sentinel traps, used to trap the 2 species responsible for transmitting Zika Virus.


Although neither Aedes aegypti nor Aedes albopictus are currently found in Weber County, Weber MAD will actively trap in areas consistent with the habitat of these two species.






The CDC Miniature Light Trap, baited with CO2, provides a portable and reliable sampling device for the collection of mosquitoes. CDC Gravid Traps attract female mosquitoes by means of a water and hay mixture allowed to incubate for several days. These gravid females, looking for standing water to lay their eggs, are attracted to the hay/water mixture. Mosquitoes collected from both types of traps are separated by species and counted, providing mosquito control personnel valuable information. The species, Culex tarsalis, Culex pipiens, and Culex erythrothorax, the vectors for West Nile Virus (WNV) in Weber County, are sorted by species into pools of 50 mosquitoes and tested for the virus in Weber MAD’s lab. Positive samples are confirmed at the Utah Public Health Laboratory.


Beginning in 2017, Weber MAD will begin testing for West Nile Virus in its own lab, resulting in quicker turnaround of samples and quicker response to positives mosquito pools.


With over 35 collection sites, Weber MAD traps over 2 nights throughout the spring and summer months.


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Weber Mosquito Abatement District 2017