Data description	Data type	Provinces supplying data
Age	Continuous	All
Sex	Male/Female	All
Case classification	Confirmed/Probable	AB, SK, MB, ON, PEI, NS, NL
Episode date	Day, Month, Year	All
Type of episode date1	Category: Onset/Sample collection/Diagnosis/Report	MB, ON, NB, NS, PEI5
Travel outside Canada	Yes/No	AB, SK, MB, ON, NB, PEI, NS, NL
Exposure to known endemic area in Canada within last 30 days1	Yes/No	MB, ON, NB, NS
Name/identifier of endemic area in Canada1	Geolocator
Exposure to known endemic area outside Canada within last 30 days1	Yes/No	MB, ON, NB, NS
Name/identifier of endemic area outside Canada1	Geolocator	MB, ON, NB, NS
Forward sortation area of residence (FSA: the first three digits of postal code)1,2	Geolocator	MB, ON, NB, NS
Symptoms of early Lyme disease (erythema migrans)1	Yes/No	MB, ON, NB, NS
Symptoms of disseminated Lyme disease1	Yes/No	MB, ON, NB, NS
Symptoms of disseminated Lyme disease: Bell’s palsy1	Yes/No	ON, NB, NS1
Symptoms of disseminated Lyme disease: other neurological symptoms1,3	Yes/No	ON, NB, NS1
Symptoms of disseminated Lyme disease: cardiac symptoms1,4	Yes/No	ON, NB, NS1
Symptoms of late Lyme disease: Recurrent arthritis/joint swelling1	Yes/No	ON, NB, NS1
Method of diagnosis1	Category: Serology/PCR/Culture	MB, ON, NB, NS*

¹ Data collected in the Lyme Disease Enhanced Surveillance system are indicated by an asterisk, otherwise data were collected via the National Notifiable Disease Surveillance System.

² Forward Sortation Area of residence was considered the location of acquisition in the absence of recorded travel or exposure history to a known Lyme disease risk area in Canada or abroad.

³ Radiculoneuropathy, encephalitis, lymphocytic meningitis, and encephalomyelitis.

⁴ Atrioventricular heart block and myocarditis

⁵ PEI provided Lyme Disease Enhanced Surveillance data elements for 2012 in August 2014; therefore this information was not included in this analysis. Abbreviations: AB: Alberta, SK: Saskatchewan, MB: Manitoba, ON: Ontario, NB: New Brunswick, NS: Nova Scotia, PEI: Prince Edward Island, NL: Newfoundland and Labrador