Table 5. Group TB infection during 1994-1998 in Japan.⁴³.

	Total number during 1994-1998	Number of clinically significant disease per group TB infection	Number of prophylaxis per group TB infection	Number of close observation per group TB infection
Hospital	32	9.2	18.9	9
Institute	6	7.3	22.3	0
Business Office	39	5.5	8.9	3.8
Community	11	5.3	4.6	1.8
University, College,  Technical College	11	1.7	32.7	24.7
High Schools	20	2.2	38.9	6.4
Junior High Schools	11	0.6	30.5	27.3
Primary Schools, Day  Care Centers	2	0.5	43.0	107.5
Total	132	5.2	20.4	10.4

Upward trend in the number of group TB infection observed during 1994-1998 (P<0.05)