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Table 2 Clinical symptoms among patients with whooping cough syndrome and Bordetella pertussis

From: Bordetella pertussis in children hospitalized with a respiratory infection: clinical characteristics and pathogen detection in household contacts

Clinical symptoms

Total of patients n = 88 (%)

Patients positive for B. pertussis n = 18 (%)

< 28 days

n = 2

29 days–< 3 months

n = 9

3–5 months

n = 2

6–11 months

n = 2

1–5 years

n = 3

Paroxysmal cough

67 (76.1)

1 (5.6)

7 (38.9)

2 (11.1)

2 (11.1)

3 (16.7)

Difficulty breathing

66 (75)

1 (5.6)

6 (33.3)

1 (5.6)

2 (11.1)

3 (16.7)

Cyanosis

59 (67)

2 (11.1)

7 (38.9)

1 (5.6)

2 (11.1)

2 (11.1)

Fever

46 (52.3)

1 (5.6)

5 (27.8)

0 (0)

1 (5.6)

2 (11.1)

Posttussive emesis

34 (38.6)

1 (5.6)

4 (22.2)

0 (0)

1 (5.6)

2 (11.1)

Breastfeeding difficulties

32 (36.4)

1 (5.6)

3 (16.7)

1 (5.6)

0 (0)

0 (0)

Ruddiness

21 (23.9)

1 (5.6)

1 (5.6)

1 (5.6)

1 (5.6)

1 (5.6)

Stridor

16 (18.2)

0 (0)

1 (5.6)

1 (5.6)

2 (11.1)

1 (5.6)

Diarrhea

15 (17)

0 (0)

3 (16.7)

0 (0)

0 (0)

1 (5.6)

Apnea

9 (10.2)

0 (0)

2 (11.1)

0 (0)

0 (0)

0 (0)

Complications

 Pneumonia

29 (33)

1 (5.6)

5 (27.8)

0 (0)

0 (0)

1 (5.6)

 Acute bronquial obstructive syndrome

18 (20.5)

0 (0)

0 (0)

0 (0)

1 (5.6)

1 (5.6)

 Atelectasis

10 (11.4)

0 (0)

2 (11.1)

0 (0)

1 (5.6)

1 (5.6)

 Convulsions

4 (4.5)

0 (0)

2 (11.1)

0 (0)

0 (0)

0 (0)

 Umbilical hernia

1 (1.1)

1 (5.6)

0 (0)

0 (0)

0 (0)

0 (0)