General statement from the State Reclamation & Mosquito Control Board

 


Central Mass. Mosquito Control Project

Weekly Report- 9/10/17-9/16/17

EPI Week #37

 

Cumulative Surveillance Summary

Target Species

Ae. vex

Cq. per

Cs. mel

Oc. can

Culex

All Species

No. Pools

97

400

79

210

1041

3682

Total Specimens

389

17648

244

3462

17757

49905

No. Pools WNV +

0

0

0

0

16†

16†

No. Pools EEE +

0

0

0

0

0

0

†Pool of WNV+ Culex species collected in Milford on 7/27/17

†Pool of WNV+ Culex species collected in Ashland on 7/27/17

†Pool of WNV+ Culex species collected in Chelmsford on 8/1/17

†Pool of WNV+ Culex species collected in Millbury on 8/4/17

†Pool of WNV+ Culex species collected in Webster on 8/8/17

†Pool of WNV+ Culex species collected in Sturbridge on 8/8/17

†Pool of WNV+ Culex species collected in Millbury on 8/11/17

†Pool of WNV+ Culex species collected in Billerica on 8/15/17

†Pool of WNV+ Culex species collected in Milford on 8/17/17

†Pool of WNV+ Culex species collected in Fitchburg on 8/22/17

†Pool of WNV+ Culex species collected in Leominster on 8/22/17

†Pool of WNV+ Culex species collected in Dracut on 8/25/17

†Pool of WNV+ Culex species collected in Acton on 8/31/17

†Pool of WNV+ Culex species collected in Natick on 8/31/17

†Pool of WNV+ Culex species collected in Billerica on 9/6/17

†Pool of WNV+ Culex species collected in Chelmsford on 9/6/17

 

Weather Summary (Northborough, MA):       The weather for this particular week averaged 67.00°F with a recorded high temperature of 84.80°F and a recorded low temperature of only 44.60°F.  For this week there was also a total of 0.05 inches of rain observed.  Compared to the previous week, it was approximately 3.64°F warmer on average, and rained about 1.75 inches less.  There has been 1.85 inches of rain accumulated in September, after 1.15 inches for the month of August.

 

CMMCP Mosquito Summary*-

Target Species                Δ From        Δ From        Predominant Trap Site(s)

                                        Last Week    Last Year

Aedes vexans

+55.56%

-63.21%

Littleton, Ayer

Coquillettidia perturbans

+250.0%

-64.70%

Littleton, Millbury

Culiseta melanura

+1300%

-62.13%

Ashland, Fitchburg, Hopkinton

Ochlerotatus canadensis

+73.33%

-33.64%

Millbury, Acton

Culex Species

+113.1%

+39.53%

Littleton, Chelmsford

All Species

+64.01%

-38.25%

Littleton

The predominant mosquito for the week was Culex spp. followed by Cq. perturbans

 

*Low late season numbers may contribute to these comparisons being not as significant as they appear

 

Epi week 37 narrative: The temperatures for EPI week 37 averaged approximately 3.64 degrees warmer than the previous week, with only 0.05 inches of precipitation observed.  Overall collection numbers increased by 64.01% from EPI week 36.  All target mosquito species were collected in higher numbers from the prior surveillance period, likely due in part to the elevated temperatures.  To this point in the season, Culex remains the only target mosquito that has been collected in higher numbers compared to 2016.  Culex is still the most abundant mosquito in the CMMCP service area, followed this week by Coquillettidia perturbans.  Two additional mosquito pools collected in EPI week 36 were determined to be WNV positive.  These collections were all Culex mosquitoes, sourced from the towns of Billerica and Chelmsford.  It was the second WNV positive collections for each of these towns this season. 

 

For the year, we received 175% more service requests than the 14 year average (16,108 in 2017 v. 9,185 14 yr. avg.), and 5.4% more than 2016 (16,108 in 2017 v. 15,281 in 2016). The standard adulticiding program has ended due to lower nighttime temperatures, declining mosquito populations and fewer service requests.  Vector spraying was done September 13 after consultation with the LBOH in Billerica and Chelmsford after confirmation of WNV in Culex. Monitoring continues at the sites where Ae. albopictus was identified.

 

Submitted by Frank Cornine, CMMCP Staff Biologist


Massachusetts Monthly Rainfall Graph – 2017 vs. 37 year average

CMMCP Weekly Rainfall Graph – 2017 vs. 12 year average (CMMCP/Northborough weather station)

2017 District Graphs

2017 Mosquito Collections – Submitted to MDPH

Service request history – 2017 vs. 14 year average

2017 rainfall vs. request graph

CMMCP trap locations - 2017 (.pdf)

 


What is an “Epi Week”?

Click here for the html version of the 2017 Epi Week calendar courtesy of CMMCP.

Click here for the pdf version of the 2017 Epi Week calendar courtesy of Jennifer Forman-Orth of MDAR.


PRIOR REPORTS:

2017 surveillance data

2016 surveillance data

2015 surveillance data

2014 surveillance data

2013 surveillance data

2012 surveillance data

2011 surveillance data

2010 surveillance data

2009 surveillance data

2008 Surveillance data

2007 Surveillance data

2006 Surveillance data


CMMCP District information – the 41 cities and towns in the CMMCP service area are broken down into 5 Districts. Each District has a Crew Leader and Field Technician assigned full time. A general description of these Districts would be: District 1 (yellow), Northeast; District 2 (blue), Northwest; District 3 (green), Central; District 4 (red), Southeast and District 5 (magenta), Southwest. Town in gray belong to other mosquito districts.