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Table 3 Pertussis positive contact case description

From: Hospital-based prospective study of pertussis in infants and close contacts in Tehran, Iran

  

Total

Asymptomatic

Symptomatic at inclusion

Symptomatic during study

N = 53

N = 15 (28.3%)

N = 36 (67.9%)

N = 2 (3.8%)

Age

 

median (IQR)

31 (18-36)

31 (24-35)

30.5 (10.5-36)

46.5

 

min-max

2-59

12-57

2-59

41-52

Relationship with index

 Mothers

n (%)

18 (34.0)

6 (40.0)

12 (33.4)

0 (0)

 Fathers

n (%)

17 (32.1)

7 (46.7)

9 (25.0)

1 (50.0)

 Siblings (<10 yoa)

n (%)

9 (17.0)

0 (0)

9 (25.0)

0 (0)

 Siblings (≥10 yoa)

n (%)

4 (7.6)

1 (6.7)

3 (8.3)

0 (0)

 Gdfathers/Gdmothersb

n (%)

3 (5.7)

1 (6.7)

1 (2.8)

1 (50.0)

 Nurses

n (%)

2 (3.8)

0 (0)

2 (5.6)

0 (0)

Pertussis diagnosis

 PCR+ only

n (%)

36 (67.9)

12 (80.0)

22 (61.1)

2 (100)

 Serology+ only

n (%)

9 (17.0)

2 (13.3)

7 (19.4)

0 (0)

 PCR+ and serology+

n (%)

8 (15.1)

1 (6.7)

7 (19.4)

0 (0)

Pertussis vaccination history

 Siblings <10 yo*

n

9

0

9

0

  Non-vaccinated

n (%)

2 (22.2)

-

2 (22.2)

-

  Vaccinated

n (%)

7 (77.8)

-

7 (77.8)

-

  >> unknown doses

n (%)

3 (42.9)

-

3 (42.9)

-

  >> 4 doses

n (%)

4 (57.1)

-

4 (57.1)

-

Macrolide treatment before inclusion

 No

n (%)

26 (49.1)

8 (53.3)

17 (42.2)

1 (50.0)

 Yes

n (%)

17 (32.1)

2 (13.3)

14 (38.9)

1 (50.0)

 Unknown

n (%)

10 (18.9)

5 (33.3)

5 (13.9)

0 (0)

  1. ayo years old, bgdfathers/gdmothers grandfathers / grandmothers