Wallis R C, Brown S E, Kloter K O, Main A J
Am J Epidemiol. 1978 Oct;108(4):322-7. doi: 10.1093/oxfordjournals.aje.a112626.
Ticks were collected during 1977 in communities east of the Connecticut River where there was a high incidence of erythema chronicum migrans and Lyme arthritis and were compared with collections from a similar area 20 km west of the river where cases of the disease were rare. Ixodes scapularis was much more abundant on the east side than on the west. Immature I. scapularis were 13 times more abundant on white-footed mice (Peromyscus leucopus), and adult I. scapularis 16 times more abundant on white-tailed deer (Odocoileus virginianus) in the east than in the west communities. In addition, all active stages in the life cycle of this tick--larvae, nymphs, and adults--both males and females, were found on humans (mostly patients) in the east communities. Both nymphs and adults were abundant on dogs and cats in this area. Attempts to recover an etiologic agent from ticks were unsuccessful.
1977年，在康涅狄格河以东社区采集蜱虫，该地区慢性游走性红斑和莱姆关节炎发病率很高，并与河以西20公里处一个类似区域采集的蜱虫进行比较，该区域该病病例很少。肩突硬蜱在东侧比西侧更为常见。未成熟的肩突硬蜱在东侧白足鼠（白足鼠属）身上的数量比西侧多13倍，成年肩突硬蜱在东侧白尾鹿（弗吉尼亚鹿）身上的数量比西侧社区多16倍。此外，在东侧社区，这种蜱虫生命周期中的所有活跃阶段——幼虫、若虫和成虫，无论雌雄，都在人类身上（大多为患者）被发现。该地区的狗和猫身上若虫和成虫都很多。从蜱虫中分离出病原体的尝试未成功。
