Table 1.

Demographics of patients with whooping cough syndrome and Bordetella pertussis

Characteristics	Total of patients n = 88 (%)	Patients positive for B. pertussis n = 18 (%)
Age
< 28 days	13 (14.8)	2 (11.1)
29 days–< 2 months	28 (31.8)	3 (16.7)
2–< 3 months	21 (23.9)	6 (33.3)
3–5 months	10 (11.4)	2 (11.1)
6–11 months	6 (6.8)	2 (11.1)
1–5 years	6 (6.8)	3 (16.7)
Gender
Male	47 (53.4)	13 (72.2)
Female	41 (46.6)	5 (27.8)
Household contacts
Mother	14 (15.9)	5 (27.8)
Father	7 (8)	3 (16.7)
Siblings < 7 years old	14 (15.9)	3 (16.7)
Siblings 7–10 years old	7 (8)	2 (11.1)
Siblings > 10 years old	2 (2.3)	1 (5.6)
Uncles/aunts	6 (6.8)	4 (22.2)
Others	11 (12.5)	3 (16.7)