東北地方におけるマダニ類の研究 : 1. 野生哺乳類寄生マダニ類と人体刺咬例

Abstract

1. The field survey on the tick had been made from May 1967 to the end of October 1972,at 33 points in 3 different Prefectures, Aomori, Iwate and Akita. In total of 1,005 mammals, 11 species belonging to 10 genera, were captured as the host of the tick (Table 1). A total of 584 specimens of ticks were collected from the above mammalian hosts. Ten species belonging to 2 genera and their hosts are shown in Table 2. 2. Two specimens of Ixodes sp. N1 obtained from Japanese shrew-mole were found as a new species. They have the similar features with I. persulcatus and I. sp. NB Ono, 1965. For comparison of morphological characters of these Ixodes species, I. sp. N1 may be easily distinguished from other 2 species in the shape of hypostome and scutum (Fig. 1). 3. Five human cases of tick biting were recorded from Aomori and Akita Prefectures in 1972 to 1973. In all cases, the removed ticks were identified as the adult female of Ixodes ovatus Neumann, 1899,which is widely and commonly parasitic on wild mammals in Tohoku (Fig. 2). Although there has been no record of this tick biting to man in Japan, and it is thought that there will be rather frequent opportunities to bite man in Tohoku area.