2013 West Nile Virus Activities

2013 Media Releases

2013 Dead Bird Surveillance

2013 Adult Mosquito Surveillance

2013 Human Surveillance

2013 Equine Surveillance

Reports & Reference Material

Larviciding in 2013

Catch Basin Larviciding
Each year, throughout Durham Region, regionally and municipally-owned roadside catch basins are monitored for larval mosquito activity, beginning mid-May. Three rounds of catch basin treatments are conducted during the WNV season with the first round of treatment traditionally occurring in mid-June and subsequent treatments occurring mid-July and mid-August. To ensure effectiveness of the larvicide, the treatments are separated by a maximum of twenty-one (21) days.

In total, 157,855 roadside catch basins and a further 404 catch basins, located on regionally or privately-owned property, were treated in 2013.

Standing Water Larviciding
Beginning early May 2012, areas of standing/stagnant water were assessed as potential larval mosquito development sites. Where remediation of identified larval mosquito development sites was not possible, biological larvicide was applied following a local risk assessment. A total of 4517 standing water site visits were conducted between May and September 2013, resulting in 1119 larvicide treatments.