Table 1 Seroprevalence of B. burgdorferi s.l. according to gender, environment, education, and activities, among age groups and in the investigated counties for each age category

Gender

 F

1.2 (5/406; 0.5–2.9)

1.7 (7/406; 0.8–3.5)

3.0 (12/406; 1.7–5.1)

 M

2.9 (23/794; 1.9–4.3)

1.8 (14/794; 1.1–2.9)

4.7 (37/794; 3.4–6.4)

Environment

 U

2.5 (20/809; 1.6–3.8)

2.0 (16/809; 1.2–3.2)

4.5 (36/809; 3.2–6.1)

 R

2.1 (8/391: 1.0–4.0)

1.3 (5/391; 0.6–3.0)

3.3 (13/391; 2.0–5.6)

Education

 S

2.3 (15/659; 1.4–3.7)

2.1 (14/659; 1.3–3.5)

4.4 (29/659; 3.1–6.3)

 H

2.4 (13/541; 1.4–4.1)

1.3 (7/541; 0.6–2.7)

3.7 (20/541; 2.4–5.6)

Activities

 O

3.5 (5/143; 1.1–8.0)

0.7 (1/143; 0.0–3.8)

4.2 (6/143; 1. 6–8.9)

 I

2.2 (23/1057; 1.5–3.2)

1.9 (20/1057; 1.2–2.9)

4.1 (43/1057; 3.0–5.4)

Total

2.3 (28/1200; 1.6–3.4)

1.8 (21/1200; 1.2–2.7)

4.1 (49/1200; 3.1–5.4)

Age groups

 Young

  M

1.3 (5/384; 0.6–3.0)

1.6 (6/384; 0.7–3.4)

2.9 (11/384; 1.6–5.1)

  F

1.1 (2/185; 0.1–3.9)

1.6 (3/185; 0.3–4. 7)

2.7 (5/185; 0.9–6.2

  Total

1.2 (7/569; 0.60–2.52)

1.6 (9/569; 0.8–3.0)

2.8 (16/569; 1.7–4.5)

 Middle-aged

  M

4.3 (16/373; 2.7–6.9)

1.9 (7/373; 0.9–3.8)

6.2 (23/373; 4.1–9.1)

  F

1.0 (2/208; 0.1–3.4)

1.9 (4/208; 0.5–4.9)

2.9 (6/208; 1.1–6.2)

  Total

3.1 (18/581; 2.0–4.9)

1. 9 (11/581; 1.1–3.4)

5.0 (29/581; 3.5–7.1)

 Old

  M

5.411 (2/37; 0.7–18.2)

2.7 (1/37; 0.1–14.2)

8.1 (3/37; 1.7–21.9)

  F

7.7 (1/13; 0.2–36.0)

0 (0/13)

7.7 (1/13; 0.2–36.0)

  Total

6 (3/50; 1.3–16.6)

2.0 (1/50; 0.1–10.7)

8 (4/50; 2.2–19.2)

Total

2.3 (28/1200; 1.6–3.4)

1.8 (21/1200; 1.2–2.7)

4.1 (49/1200; 3.1–5.4)

Counties

 Alba

  Young

1.1 (1/89; 0.0–6.1)

2.3 (2/89; 0.3–7.9)

3.4 (3/89; 0.7–9.5)

  Middle-aged

2.9 (3/104; 0.6–8.2)

2.9 (3/104; 0.6–8.2)

5.8 (6/104; 2.2–12.1)

  Old

28.6 (2/7; 3. 7–71.0)

0 (0/7)

28.6 (2/7; 3. 7–71.0)

  Total

3 (6/200; 1.1–6.4)

2.5 (5/200; 0.8–5.7)

5.5 (11/200; 2. 8–9.6)

 Bistrița-Năsăud

  Young

0 (0/87)

2.3 (2/87; 0.3–8.1)

2.3 (2/87; 0.3–8.1)

  Middle-aged

5.6 (6/108; 2.1–11.7)

4.6 (5/108; 1.5–10.5)

10.2 (11/108; 5.2–17.5)

  Old

0 (0/5)

0 (0/5)

0 (0/5)

  Total

3 (6/200; 1.1–6.4)

3.5 (7/200; 1.4–7.1)

6.5 (13/200; 3.5–10.9)

 Cluj

  Young

2.2 (3/139; 0.5–6.2)

1.4 (2/139; 0.2–5.1)

3.6 (5/139; 1.2–8.2)

  Middle-aged

0 (0/57)

3.5 (2/6; 0.4–12.1)

3.5 (2/57; 0.4–12.1)

  Old

25 (1/4; 0.6–80.6)

0 (0/4)

25 (1/4; 0.6–80.6)

  Total

2 (4/200; 0.6–5.0)

2 (4/200; 0.6–5.0)

4 (8/200; 1.7–7.7)

 Maramureș

  Young

2 (2/100; 0.2–7.0)

2 (2/100; 0.2–7.0)

4 (4/100; 1.1–9.9)

  Middle-aged

3.2 (3/94; 0.7–9.0)

1.1 (1/94; 0.013–5.8)

4.3 (4/94; 1.2–10.5)

  Old

0 (0/6)

0 (0/6)

0 (0/6)

  Total

2.5 (5/200; 0.8–5.7)

1.5 (3/200; 0.3–4.3)

4 (8/200; 1.7–7.7)

 Sălaj

  Young

1.1 (1/92; 0.0–5.9)

0 (0/92)

1.1 (1/92; 0.0–5.9)

  Middle

5.0 (5/101; 1.6–11.2)

0 (0/101)

5.0 (5/101; 1.6–11.2)

  Old

0 (0/7)

0 (0/7)

0 (0/7)

  Total

3 (6/200; 1.1–6.4)

0 (0/200)

3 (6/200; 1.1–6.4)

 Satu-Mare

  Young

0 (0/62)

1.1 (1/62; 0.0–8.7)

1.6 (1/62; 0.0–8.7)

  Middle

0.9 (1/117; 0.0–4. 7)

0 (0/117)

0.9 (1/117; 0.0–4.7)

  Old

0 (0/21)

4.8 (1/21; 0.1–23.8)

4.8 (1.21; 0.1–23.8)

  Total

0.5 (1/200; 0.0–2.8)

1 (2/200; 0.1–3.6)

1.5 (3/200; 0.3–4.3)

Total

2.3 (28/1200; 1.6–3.4)

1.8 (21/1200; 1.2–2.7)

4.1 (49/1200; 3.1–5.4)