Table 2 Summary of confirmed and possible cases of rickettsial infection, Ontario, Canada (2013–2018)

Total cases, n

20

7

19

Female, n (%)

13 (65.0)

3 (42.9)

11 (57.9)

Age, mean ± SE (range)

33.3 ± 4.05 (1–62)

45.3 ± 7.66 (19–72)

43.3 ± 5.00 (7–84)

 1:64

16

5

n/a

 1:128

2

1

n/a

 1:256

2

1

n/a

 1:64/1:64

n/a

n/a

5

 1:64/1:128

n/a

n/a

1

 1:128/1:64

n/a

n/a

4

 1:128/1:128

n/a

n/a

5

 1:128/1:256

n/a

n/a

2

 1:256/1:128

n/a

n/a

1

 1:256/1:256

n/a

n/a

1

 2013

0

0

1

 2014

0

1

1

 2015

3

1

2

 2016

0

2

6

 2017

6

3

4

 2018

11

0

5

 Fever

20 (100.0)

7 (100.0)

19 (100.0)

 Headache

10 (50.0)

2 (28.6)

9 (47.4)

 Rash (maculopapular)

6 (30.0)

1 (14.3)

2 (10.5)

 Gastrointestinal complaints

5 (25.0)

3 (42.9)

6 (31.6)

 Rash (vesicular)

4 (20.0)

0 (0.0)

2 (10.5)

 Encephalitis/meningitis

4 (20.0)

0 (0.0)

3 (15.8)

 Respiratory complaints

3 (15.0)

1 (14.3)

3 (15.8)

 Rash (not described)

2 (10.0)

0 (0.0)

2 (10.5)

 Tick bite

2 (10.0)

1 (14.3)

0 (0.0)

 Fatigue

1 (5.0)

1 (14.3)

7 (36.8)

 Malaise/unwell

1 (5.0)

1 (14.3)

3 (15.8)

 Arthralgia/arthritis

0 (0.0)

1 (14.3)

2 (10.5)

 Chills

0 (0.0)

0 (0.0)

1 (5.3)

 Elevated liver enzymes

0 (0.0)

1 (14.3)

0 (0.0)

 Myalgia/body aches

0 (0.0)

1 (14.3)

2 (10.5)