Table 1.

Number, species, and stages of field-collected ticks

Survey area	No. of ticks by species and stage													Parasite lineage(s) in small mammalsa
	I. ovatus		I. persulcatus		I. turdus		I. tanuki		H. flava		H. douglasi		Total
	Adult	Nymph	Adult	Nymph	Adult	Nymph	Adult	Nymph	Adult	Nymph	Adult	Nymph
Hokkaido Island
Nemuro	137	0	174	298	0	0	0	0	0	0	1	0	610	Hobetsu, U.S.
Horonobe	4	0	43	0	2	0	0	0	0	0	0	0	49	—b
Kiyosato	171	0	275	13	0	0	0	0	0	0	9	3	471	Hobetsu
Shimokawa	270	0	35	0	0	0	0	0	0	0	0	0	305	NDc
Aibetsu	167	0	178	0	0	0	0	0	0	0	0	0	345	ND
Furano	265	0	83	0	0	0	0	0	0	0	0	0	348	ND
Hobetsu	1,252	6	99	60	0	0	0	0	0	2	5	27	1,451	Hobetsu
Ebetsu	36	0	15	0	0	0	1	0	0	0	0	0	52	—
Chitose	76	0	1	0	0	0	0	0	0	0	0	0	77	ND
Subtotal	2,738	0	903	371	2	0	1	0	0	2	15	30	3,708
Awaji Island
Sumoto	190	0	0	0	11	12	0	0	14	75	0	0	302	Hobetsu, Kobe
Total	2,568	6	903	371	13	12	1	0	14	77	15	30	4,010

^aB. microti group lineage has been reported to occur in small wild mammals in the area (32, 34, 37).

^bWild animals in the area are reported to be free from infection with B. microti group organisms.

^cNot done (epidemiological study has never been done before in the area).