| aggregated distribution of infective spots composed of leptotrombidium pallidum, highly prevalent with rickettsia tsutsugamushi, demonstrated by sentinel voles, microtus montebelli, on the ground. | in the epidemiological surveys on scrub typhus at chichibu city near tokyo, an area, 350 m by 35 m, in the hitsujiyama park was found to be heavily infested with rickettsia tsutsugamushi (rt). distribution of trombiculid mites and their infection rates in this area were studied using sentinel animals, 48 microtus montebelli and 10 ddy mice. the surveys were conducted 6 times in the autumn in 1985 and 1986. at the first 2 surveys, 16 animals were placed at random, and 4 restricted areas were iden ... | 1990 | 2128945 |