Table 3.

Bacteriological findings in class 2 contacts

Group	Contacts	Total No	No (%) of carriers	No (%) of carriers with pathogenic strain
7	Grandparents	41	6 (15)	2 (5)
8	Others*	37	5 (14)	0
9	Playmates, close friends	249	50 (20)	5 (2)
10	Nursery employees	60	5 (9)	1 (2)
11	Childminders, babysitters, home helps	5	2 (40)	1 (20)
12	Other family†	184	37 (20)	2 (1)
Total		576	105 (18.2)	11 (1.9)

^*Playmates’ family and childminders’ children.  

^†Parents, children, and siblings outside the patient’s household, and cousins, fathers in law, mothers in law, sons in law, and daughters in law.