Specific Information for Areas in Ontario

As in previous reports, I have provided statistics for areas in southern Ontario by grouping towns within one or more Conservation Areas or watersheds. I have provided also for comparison some 1997 statistics (shown in brackets) and this data is not necessarily from the same group of towns from which reports were received for 1998.

Amherstburg, Belle River, Chatham, Emeryville, Essex, Kingsville, Leamington, Oliver, Tecumseh, Tilbury, Wheatley and Windsor had 83 cases (79 in 1997). There were 21,700 dogs tested (19,350 in 1997) to give a prevalence of 0.38% (0.41% in 1997). There were 78 infected dogs which had not been on preventive medication in the previous year and the prevalence among such unprotected dogs was 1.30% (3.72% in 1997). There were 62 infected dogs that had never left the area and the movement for 18 was unknown.

In Brights Grove, Dresden, Forest, Glencoe, Mt. Brydges, Sarnia, Strathroy and Watford there were 65 dogs with HW (118 in 1997). There were 6,700 dogs tested (8,197 in 1997) with a prevalence of 0.97% (1.44% in 1997). There were 60 infected dogs which had not been on medication in 1997 and the prevalence in unprotected dogs was 6.09% (7.04% in 1997). There were 47 infected dogs that had never left the area and the movement for 18 was unknown.

Along Lake Erie and including Aylmer, Blenheim, Caledonia, Cayuga, Delhi, Dunnville, Fisherville, Hagersville, Norwich, Port Dover, Ridgetown, Shadden, Simcoe, St. Thomas and Tillsonburg there were 154 cases (203 in 1997). There were 15,289 dogs tested (14,066 in 1997) to give a prevalence of 1.01% (1.44% in 1997). There were 129 infected dogs which had not been on preventive medication in 1997 and the prevalence in unprotected dogs was 3.86% (4.83% in 1997). There were 130 infected dogs which had never left the area and the movement for 21 was unknown.

In London and surrounding areas of Arva, Dorchester, Ingersoll, Kirkton, Komoka, Mitchell, St. Mary's, Stratford and Woodstock there were 17 dogs with HW (8 in 1997). There were 16,405 dogs tested (13,880 in 1997) to give a prevalence of 0.10% (0.06% in 1997). There were 15 infected dogs that had not been on preventive medication in 1997 and the prevalence in unprotected dogs was 0.50% (0.20% in 1997). Eleven infected dogs had never left the area, 3 had visited endemic areas and the movement for 3 was uknown.

In an area extending through Fort Erie, Niagara Falls and St. Catharines there were 69 cases (74 in 1997). That area included also Beamsville, Fonthill, Grimsby, Mount Hope, Port Colborne and Welland and in which 14,538 dogs were tested (14,023 in 1997) to give a prevalence of 0.47% (0.53% in 1997). There were 60 infected dogs that had not been on medication in 1997 and the prevalence in unprotected dogs was 1.62% (2.10% in 1997). Fifty-four of the infected dogs had never left the area and the movement for 15 was unknown.

In Ayr, Belwood, Brantford, Breslau, Cambridge, Drayton, Drumbo, Elmira, Elora, Guelph, Kitchener, New Hamburg, Paris, Rockwood, St. Clements, St. George, Waterloo and Wellesley there were 42 cases (65 in 1997). Twenty-one of the infected dogs were diagnosed in Brantford. There were 25,471 dogs tested (26,336 in 1997) to give a prevalence of 0.16% (0.25% in 1997). Thirty-three infected dogs had not been on preventive medication in 1997 and the prevalence in unprotected dogs was 0.67% (0.88% in 1997). Twenty-one of the infected dogs had never left the area, one had visited an endemic area in the province, one had been outside Canada and for 19 the movement was unknown.

In Ancaster, Burlington, Carlisle, Dundas, Hamilton, Lynden, Stoney Creek, Waterdown, West Flamborough and Winona there were 14 dogs with HW (10 in 1997). There were 14,715 dogs tested (16,921 in 1997) to give a prevalence of 0.10% (0.06% in 1997). Twelve of the dogs with HW had not been on preventive medication in 1997 and the prevalence in unprotected dogs was 0.61% (0.24% in 1997). Eleven of the infected dogs had never left the area, 1 had visited endemic areas in Ontario and 2 had been outside Canada.

There were 8 cases reported from the area including Acton, Campbellville, Georgetown, Hillsburgh, Mississauga, Oakville, Orangeville and Streetsviille (5 in 1997). There were 22,292 dogs tested (17,338 in 1997) to give a prevalence of 0.04% (0.03% in 1997). Five of the infected dogs had not been on preventive medication in 1997 and the prevalence in unprotected dogs was 0.11% (0.13% in 1997). Five of the dogs had never left the area, 2 had been outside Canada and the movement for 1 was unknown.

In Metropolitan Toronto and including Agincourt, Aurora, Bolton, Bramalea, Brampton, Caledon East, Concord, Don Mills, Etobicoke, King City, Kleinburg, Maple, Markham, Nobleton, North York, Rexdale, Richmond Hill, Scarborough, Stouffville, Thornhill, Unionville, Weston, Willowdale and Woodbridge there were 20 cases (23 in 1997). There were 48,249 dogs tested (49,896 in 1997) to give a prevalence of 0.04% (0.05% in 1997). Fourteen of the infected dogs had not been on preventive medication in 1997 and the prevalence in unprotected dogs was 0.14% (0.22% in 1997). Eight infected dogs (Aurora, Brampton, King City, Scarborough, Toronto) had never left the area, 1 had been outside Canada.

There were 13 infected dogs in the area including Athens, Belleville, Brockville, Campbellford, Colborne, Gananoque,.Kingston, Napanee, Picton, Stirling, Sydenham, Trenton, Tweed, Westport and Yarker (12 in 1997). There were 13,777 dogs tested (12,546 in 1997) to give a prevalence of 0.09% (0.21% in 1997). Ten of the infected dogs had not been on preventive medication in 1997 and the prevalence in unprotected dogs was 0.39% (0.77% in 1997). Twelve of the infected dogs had never left the area and the movement for 1 (Kingston) was unknown.

There were 28 cases in the area including Alexandria, Almonte, Arnprior, Carleton Place, Casseleman, Cobden, Cornwall, Dunrobin, Embrun, Gloucester, Greely, Hawkesbury, Kanata, Kemptville, Lanark, Manotick, Martintown, Merrickville, Nepean, North Gower, Orleans, Ottawa, Pembroke, Perth, Prescott, Renfrew, Russell, Rockland, St. Isidore, Stittsville, Vanier, Vankleek Hill and Winchester (22 in 1997). There were 28,444 dogs tested (23,716 in 1997) to give a prevalence of 0.10% (0.09% in 1997). Twenty-two of the infected dogs had not been on preventive medication in 1997 and the prevalence in unprotected dogs was 0.30% (0.36% in 1997). Sixteen dogs (Cobden, Cornwall, Dunrobin, North Gower, Orleans, Ottawa, Pembroke, Prescott, Rockland, Russell) had never left the area, 1 (Nepean) had been in another province, 2 (Cornwall) had been outside Canada, 2 (Pembroke) had visited endemic areas and the movement for 7 (Arnprior, Manotick, Nepean, Ottawa, Pembroke) was unknown.

Your interest in and comments and advice on the survey were appreciated. I believe the information derived from the surveys can be of assistance when making decisions with your clients on testing for HW and use of preventive medications.