News Briefs | July 27, 2022
MVCAC 91st Annual Conference
Call to Present a Poster and William E. Walton Poster Competition
Applications for the 2022 Poster Session and the inaugural William E. Walton Poster Competition will be accepted through Monday, October 3, 2022. The objective of the competition is to recognize exceptional poster presentations in the field of mosquito and vector control research and operations in honor of the late Dr. William (Bill) E. Walton who was passionate about and committed his career to entomology and vector ecology. This application is for all poster submission, interested applicants for the Walton Competition must opt-in to the competition on the application. 

Click here to view the poster presentation guidelines and to apply.
2022 William C. Reeves New Investigator Award Applications Due 10/3/22
Applications for the 2022 William C. Reeves New Investigator Award will be accepted through Monday, October 3, 2022. The William C. Reeves New Investigator Award, memorializing Dr. William C. Reeves, who was a renowned University of California entomologist, is sponsored by the Mosquito and Vector Control Association of California (MVCAC). The award is presented to the best scientific paper submitted and presented at the annual MVCAC conference. The Reeves New Investigator Award application differs from the MVCAC Call for Papers, if you have an additional speaking topic for the Call for Papers, please follow that application and guidelines. 
Please click here for more information.
MVCAC 91st Annual Conference
Call for Papers and Presentations
The Mosquito and Vector Control Association of California (MVCAC) will hold its 91st Annual Conference January 29-February 1, 2023 at the Disneyland Hotel in Anaheim, CA. This year’s conference will focus on “Innovative Control Technologies for the Future”. With this in mind, we hope you will consider submitting a paper that will be considered for presentation at the conference.

Presentations should be related to mosquitoes or other vectors, the disease organisms they transmit, or their surveillance and control. Presentations may be about research results, the development and testing of new methods, equipment or products, education, community outreach and the adaptation or development of new technology relating to vector research, surveillance or control, or the administration of a vector control agency.
If you are interested in presenting a paper, please complete the attached “Request to Present a Paper” form. An extended abstract is REQUIRED for all presentations and posters. Abstracts may be made available to participants before or at the conference and will appear in the Proceedings and Papers of MVCAC. After the conference, presenters will be asked to replace their abstract with a paper for publication in the Proceedings. 
With limited time for presentations, final scheduled oral presentations will be at the discretion of the Program Committee. 

Presenters will be notified by October 28, 2022 if they are accepted as a speaker and be given the time allotted for their presentation. 

All presenters must register for the conference and are responsible for registration and arranging their own travel. 

Deadline for submission of the completed “Request to Present a Paper” form is Monday, October 3, 2022. Requests received after the deadline may not be accepted.

Click here to view the draft conference agenda
Upcoming Events
MVCAC Summer Meeting
July 28th | 9am - 12pm
Via Zoom
Agenda packet and zoom links are available behind the member login here.
Save the Date!
MVCAC Fall Meeting
November 1-3 (meeting 11/2-11/3)
Visalia Marriott
More information to come!
Save the Date!
MVCAC Planning Meeting
December 5-7 (meeting 12/6-12/7)
Oakland Waterfront Hotel
More information to come!
Save the Date!
91st Annual MVCAC Conference
Sunday, January 29 – Wednesday, February 1, 2023
Disneyland Hotel, Anaheim
Click here to view the draft agenda

Hotel Information:
Room rate is $269/night plus taxes
Book your rooms here

Exhibitor/Sponsor Information:
Booth and sponsorship sales will be opening next week! Please contact Julie Wallner if interested:
More information to come!
PR Committee Education and Outreach Materials
Google Drive
The PR committee has created a google drive to house all of the education and outreach materials in one place and make them accessible for MVCAC members. Please check it out as it includes several photos/images, factsheets, and videos. If there are photos or materials that you would like to add to the drive to share with other districts please reach out to Lisa Yarbrough ( or Nola Woods (
Meritorious Service Award, Honorary Member Award and Service with Distinction Award Nominations Now Open
It's Nomination time! Nominations are now open for MVCAC's Meritorious Service Award, Honorary Member Award and the Service with Distinction Award. All nominations must be received in the MVCAC office by September 12th so they may be included on the ballot to all the member districts, or adequate ad hoc committees may be appointed (for Service with Distinction).
Award Criteria:
  • Honorary Membership- for any person who has rendered exceptional, distinguished service in the interest of mosquito or vector control in the state of California
  • Meritorious Service- for any member or nonmember who have made special and significant contributions to the field of mosquito control in the State of California or elsewhere
  • Service with Distinction- may be conferred on those who have made a significant contribution to fulfilling the mission of the Association. They must meet the following criteria: Made exceptional professional or voluntary service in support of the advancement and continued excellence of the Association; have earned national or international distinction for their services in the subject of mosquito and vector control; have made a significant contribution to any local community within the jurisdiction of their agency and focused on mosquito and vector control.

Honorary and Meritorious Service requires 5 letters from district managers in support of their nomination.
Service with Distinction nominations can come from any MVCAC member
For all award nominations, a list of the individuals qualifying accomplishments and achievements must also be received with the nomination letter.
Please submit nominations via email to or fax at 916-444-7462 attn: Award Nominations. Ballots for Honorary and Meritorious Service will be sent out after September 14th, with a due date before the Fall meeting in November.
Please do not hesitate to contact the MVCAC office if you have any questions!
Share Your Post COVID-19 Exposure Methods With Us
MVCAC is looking for member districts to share with us their post COVID exposure methods and logistics. Please email the methods you have in place to and we will add them to the COVID-19 page on the MVCAC website.

Thank you!
MVCAC Member Resources Re: COVID-19
MVCAC will be assembling and posting some information and templates of what some Districts have created and shared as they manage their operations. Items like sample document for field staff to carry in addition to their ID to validate status/purpose and actions related to seasonal hires. It will be posted as it becomes available to a new members-only page on the MVCAC website.

Click the button below to login and view.
Grandmother Mosquito: A new education tool for OCMVCD

Orange County Mosquito and Vector Control District (OCMVCD/District) considers education an essential function of vector control. The challenge is in making a lasting impression. The District values all the interactions and educational opportunities with the public, both online and in-person. The challenge is how to keep mosquito control in people’s minds, beyond a fleeting interaction.

The idea of a children’s book seemed perfect for keeping mosquito control in people’s working memory. Children love books and for many families, shared reading is a nightly ritual. A typical habit of many children is to reread books over and over. As children hear stories, they internalize the message of the story. Parents who read with their child also learn as they read.
Submit your district for the next Spotlight On
Does your agency have a success story, a staff member you would like to publicly recognize, or an innovation by your agency that you would like to highlight? "Spotlight On" on the MVCAC website is one way to share your story! Each submission which meets the specified criteria will be reviewed and posted on the MVCAC website on the Spotlight On page and highlighted on the homepage in the rotating feature box. Each story will remain posted for 1-2 months before being moved to a publicly archived page. 

Interested? Click here to fill out an application!

Applications can be submitted to the MVCAC office at
HR resources for districts to use and to upload information into
District Managers - Please upload your HR resources and information into this Google Drive along with using it for your own district.

Click here to access the Google Drive.
Why are there no human West Nile virus outbreaks in South America?
Posted by Vector and Vector-borne Disease Committee
July 25, 2022

Camila Lorenz,* and Francisco Chiaravalloti-Neto

Department of Epidemiology, School of Public Health, University of S~ao Paulo, S~ao Paulo, Brazil

The Lancet Regional Health – Americas 2022;12: 100276;

Note: Historically the North American encephalitis viruses have more or less ‘disappeared’ into the Neotropics, with sporadic detection during enhanced surveillance and small outbreaks documented in Argentina. The current Comment piece proposes the following hypotheses. 1) Under-reporting. Diagnosis of WNV fever cases may be lost among the frequent occurrence of other arboviruses such as DENV, ZIKV and Mayaro.  2) Co-circulation. Other viruses such as Rocio and SLEV may provide cross protection and limit amplification. However, this would seem poorly supported given the recent resurgence of SLEV in the SW USA where WNV remains endemic. 3) Evolution of attenuated strains. Several isolates from the Neotropics have been attenuated and may not produce neuroinvasive disease and therefore are not detected.
Survival and Release of 5 American Crows (Corvus brachyrhynchos) Naturally Infected With West Nile Virus
Posted by Vector and Vector-borne Disease Committee
July 25, 2022

Cynthia Hopf, Elizabeth Bunting, Anne Clark, and Sara Childs-Sanford        

From the Janet L. Swanson Wildlife Hospital and the Department of Clinical Sciences, College of Veterinary Medicine (Hopf, Childs-Sanford), and the Department of Population Medicine and Diagnostic Sciences (Bunting), Cornell University, Ithaca, NY 14853, USA; and the Department of Biological Sciences, Binghamton University, Binghamton, NY 13902, USA (Clark).

Journal of Avian Medicine and Surgery 36(1), 85-91, (2 May 2022).

Abstract [condensed].  … American crows with WNV infections are received and treated at the Janet L. Swanson Wildlife Hospital (Cornell University, Ithaca, NY, USA) on a regular basis during the summer and fall and have historically had a 100% mortality rate. The 5 American crows in this case series were tested, when possible, by polymerase chain reaction (PCR) and plaque reduction neutralization on admission and monitored with both PCR and plaque reduction neutralization throughout their rehabilitation process. Four of the 5 birds had a negative PCR test before release, and 1 bird had a “suspect” positive PCR test result before release. One of the crows was confirmed to have survived for at least 2.5 years after release. Viral shedding was documented up to 93 days after initial hospitalization, which is longer than any previous report of WNV shedding in an American crow.

Note: The study documents the survival of some crows after infection with WNV. Expansion of this trend may reduce the sensitivity of the dead bird surveillance program and perhaps attenuate WNV amplification through increasing flock immunity.  
News Headlines
MVCAC News Briefs - Zika Updates
Please note: The items contained below are not the views or opinions of MVCAC but they are what is being reported in the media. The goal of MVCAC providing this information is to keep MVCAC members informed of all news articles that are being presented regarding Zika.

MVCAC News Briefs - Other Outbreaks
Please note: The items contained below are not the views or opinions of MVCAC but they are what is being reported in the media. The goal of MVCAC providing this information is to keep MVCAC members informed of all news articles that are being presented regarding other outbreaks.

July 22, 2022: Valley gets another case of West Nile virus - Valley Press
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MVCAC Jobs Board
Interested in a career in mosquito and vector control? Check out the MVCAC Jobs Board at
Have a Job or RFP to post to 
Requests to post job listings (no more than 500 words in length) may be submitted by MVCAC members via this web form (Note: you will need to login to access this form). Non-Members are asked to submit listings to the webmaster at
MVCAC Sustaining Member Corner
Note: MVCAC does not endorse the products below, but we do support our Sustaining Members

Central Life Sciences has announced the release of Aqua Zenivex™ E20, a reduced-risk adulticide for mosquito control professionals.