Thomas P. Breaud, Ph.D.Manager

August 5, 2014

Mosquito-borne Disease Threats

• Mosquito-borne Disease Threats

– Chikungunya (contortion fever)

– Dengue (breakbone fever)

• Control Techniques

• Outlook

Overview

Dengue and Chikungunya

Protecting Florida from Dengue andChikungunya through Control of Aedes aegypti

and Aedes albopictus

June 3-4, 2014

THE FLORIDA MEDICAL ENTOMOLOGY LABORATORYUniversity of Florida IFAS

Vero Beach, Florida

Protecting Florida

Workshop attendees represented:

• 75% of Florida’s population

• 90% of the total of Mosquito Control budgets

• 32 Florida Counties

• 25 FL Mosquito Control Districts

• 17 FL Department of Health Offices

Dengue Transmission in Florida 2009-2014

20092010

2011

2012

2013

Chikungunya

• First case in this hemisphere December 7, 2013 St. Martin

• 443,552 confirmed/suspected cases in 29 countries/territories

of the Caribbean and South America as of July 28, 2014

Chikungunya – vector mosquitoes

Aedes aegypti Aedes albopictus

Chikungunya – vector mosquitoes

• The Yellow Fever mosquito and the Asian Tiger mosquito are difficult to control because of their life cycles

• They use artificial containers to lay their eggs

• They are daytime biters

• At summer temperatures, they can go from egg to adult in a week

Typical Container Breeding Sites

Sources of Standing Water

Survey Findings CY 2014

Survey Findings CY 2011-14

Total parcels

Residents home

Percent at home

Permission to inspect

Percent home

inspected

% Total Parcels

Inspected

# of Houses

with containers of water

Total # of containers with water

Total # of containers with larvae

Percent insp. w/

cont.

Percent cont. w/ larvae

Staff Hours

6,427 1,449 23% 926 64% 14% 484 941 315 52% 33% 1,154

2014

Total parcels

Residents home

Percent at home

Permission to inspect

Percent home

inspected

% Total Parcels

Inspected

# of Houses

with containers of water

Total # of containers with water

Total # of containers with larvae

Percent insp. w/

cont.

Percent cont. w/ larvae

Staff Hours

10,716 2,461 23% 1,669 68% 16% 771 1,640 507 46% 31% 2,514

2011-2014

Survey Statistics

The Danger of Imported Cases

Current Chikungunya Situation Florida

• Imported cases YTD Orange County – 14

• Imported cases YTD – 105

• Locally Transmitted Cases YTD - 4

Current Chikungunya SituationCaribbean

• Confirmed/Probable Cases – 5,824

• Suspected Cases – 437,728

• 29 Countries/Territories

If Orange County had the same incidence rate as Guadalupe, we could expect 165,652 cases.

Response to the Threat

Operations

• Increasing door to door sweeps

• Increasing passive surveillance

• Deploying special Aedes traps

• Utilizing special equipment

• Utilizing special insecticides

Door to Door

BG-Sentinel Mosquito Trap

LBJ Ovitrap

Aedes eggs laid on moist surfaces

LBJ Trap Results

New Insecticides in the Arsenal

New (Old) Equipment in the Arsenal

• Orange County Emergency Management

• Orange County Communications

• Orange County Code Enforcement

• Orange County Health Department

Mosquito Control Division Response

Staffing and Communications

Previous Planning

Mosquito Disease Contingency Planning MeetingSeptember 5, 2012

• OC Health Department

• OC Public Schools

• OC Environmental Protection Division

• OC Office of Emergency Management

• OC Health Services Department

• OC Sheriff’s Office

Successful Aedes aegypti and albopictus Control Efforts Require This…

Panama

Dr. Wm. Gorgas

South America

Dr. Fred Soper

Successful Aedes aegypti and albopictus Control Efforts Require This…

Pandora’s Box Has Been Opened

Mosquito Control

Public Health’s First Line of Defense Against Mosquito-borne Disease