Table 3. Prevalence of Anaplasma phagocytophilum, Babesia microti, Borrelia burgdorferi and Borrelia miyamotoi infection in Ixodes pacificus and Ixodes scapularis ticks submitted through passive surveillance, Canada, 2020^a,b.

Pathogen	Infection prevalence
	Ixodes pacificus		Ixodes scapularis
Single agent	Maximum likelihood estimate
	%	95% CI	%	95% CI
Anaplasma phagocytophilum	N/A	N/A	0.87	0.64–1.15
Babesia microti	N/A	N/A	0.02	0–0.09
Borrelia burgdorferi	0	0–0.54	17.19	16.17–18.26
Borrelia miyamotoi	0.14	0.01–0.68	0.49	0.33–0.71
Total single agent	0.14	0.01–0.68	18.21	17.16–19.29
Co-infection	Co-infection rate
	%	Number co-infected ticks/number ticks tested	%	Number co-infected ticks/number ticks tested
Anaplasma phagocytophilum + Babesia microti	N/A	N/A	0	0/4,874
Anaplasma phagocytophilum + Borrelia burgdorferi	N/A	N/A	0.12	6/4,874
Anaplasma phagocytophilum + Borrelia miyamotoi	N/A	N/A	0.02	1/4,874
Babesia microti + Borrelia burgdorferi	N/A	N/A	0	0/4,882
Babesia microti + Borrelia miyamotoi	N/A	N/A	0	0/4,883
Borrelia burgdorferi + Borrelia miyamotoi	0	0/705	0.14	7/4,882
Total co-infected	0	0/705	0.29	14/4,883

Abbreviations: CI, confidence interval; N/A, not tested

^a All I. pacificus (n=718) were not tested for A. phagocytophilum and B. microti. All I. scapularis from Alberta or submitted through eTick were not tested for any pathogen

^b Number of I. scapularis ticks tested: A. phagocytophilum (n=5,090), B. microti (n=5,100), B. burgdorferi (n=5,098), B. miyamotoi (n=5,094). Number of I. pacificus ticks tested: B. burgdorferi (n=705), B. miyamotoi (n=705)