Ministry Reports

West Nile Virus Preparedness and Prevention Plan - 2007

June 25, 2007


This following document is the West Nile Virus - Preparedness and Prevention Plan for Ontario - 2006, a technical reference document for Ontario's 36 Health Units to assist with the implementation of the Control of West Nile Virus Regulation - O.R. 199/03), made under the Health Protection and Promotion Act. It is referred to in this document as 'the Plan'. The material content in the 'Plan' incorporates the cumulative experience of public health with vector borne diseases and their control across North America with relevance to Ontario's topography, climate, vector species and vast natural resources, with particular emphasis on our ongoing communication with the public Health Units (HUs) of Ontario.

Risk Assessment

Under the Control of West Nile Virus Regulation (see Appendix V), the local Medical Officer of Health (MOH) is required to conduct a risk assessment of the conditions pertaining to WNV in the Health Unit. This risk assessment will identify the relative risk of human infection from WNV using surveillance information based upon dead birds, mosquito information, equine infections along with any human cases, and may include a number of other germane information elements. Completion of the risk assessment in accordance with the Regulation will offer guidance to the appropriate WNV control activities for the Medical Officer of Health (MOH), and if needed, provides a review of appropriate vector (mosquito) control activities (i.e. larval/adult mosquito control measures) and their effective application. Further, the Regulation requires the local municipality to which the risk assessment applies to undertake those measures necessary for vector and disease control when directed to do so by the Medical Officer of Health.

In addition, under the Control of West Nile Virus Regulation, the Medical Officer of Health is also required to maintain a means to record, investigate, and report any confirmed or likely adverse or unintended human health effects attributed to mosquito control actions, and to report any non-human environmental adverse effects that he/she knows about to the Ministry of the Environment and/or other relevant local or provincial authorities.

The full document and appendices are available for download below :

Note that this plan is subject to change during the 2007 season.

Document Download

Full Document - With appendices
West Nile Virus Preparedness and Prevention Plan Ontario - 2007
97 pages | 662 kb | PDF format

Main Document - Without appendices
West Nile Virus Preparedness and Prevention Plan Ontario - 2007
50 pages | 285 kb | PDF format

Appendix Ia
Human Surveillance Case Definition
7 pages | 44 kb | PDF format

Appendix Ib
Health Unit Notification to Central Public Health Lab
1 page | 32 kb | PDF format

Appendix Ic
Health Unit Notification to Canadian Blood Services
1 page | 37 kb | PDF format

Appendix Id
Health Unit Notification to Trillium Gift of Life Network
2 pages | 33 kb | PDF format

Appendix Ie
Human Case Investigation Report for West Nile Virus
8 pages | 100 kb | PDF format

Appendix IIa
Health Unit Codes
1 page | 21 kb | PDF format

Appendix IIb
Mosquito Species to be Identified and Reported
1 page | 15 kb | PDF format

Appendix IIc
Mosquito Species Proven Positive for WNV, EEE or Dengue
1 page | 17 kb | PDF format

Appendix IId
WNV Mosquito Species Viral Testing Order of Preference
1 page | 27 kb | PDF format

Appendix III
The Handling and Submission of Avian Specimens
6 pages | 46 kb | PDF format

Appendix IV
Mandatory Health Programs and Services Guidelines
2 page | 20 kb | PDF format

Appendix V
Ontario Regulation 199/03
2 pages | 23 kb | PDF format

Appendix VIa
Summary Report: WNV Mosquito Control Malathion-Related Illness
2 pages | 48 kb | PDF format

Appendix VIb
Malathion TOX Q & A Circular
10 pages | 62 kb | PDF format

Appendix VIc
WNV Malathion Application: Human Exposure and Adverse Effects Incident Report
3 pages | 40 kb | PDF format

Appendix VII
Factors for Consideration for Adult Mosquito Control through Ultra-Low Volume (ULV) Application
1 page | 20 kb | PDF format

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