@techreport{oai:soar-ir.repo.nii.ac.jp:00017043,
 author = {内川,  公人 and 山田,  喜紹 and 小穴,  こず技 and 吉田,  安雄 and 下里,  文子 and 亀子,  文子},
 month = {Mar},
 note = {Isolation of Rickettsia tSlLtsOTTUJshi was attempted from field mice， Apoderrw.s specioslLS， and chiggers，Leptotrombidirlm po1lidllm， collected in a suburb of Iida City in November 1985. Three out of four A. specie ILS were positi ve for the rickettsiaethroughintraperitoneal passage of their spleen homogenates in laboratory mice. Also positive were four out of 20 pools Ce ach pool consisted of 20 engorged larvae) of L. po1lidllm detachedfrom the hosts and crushed thoroughly in sucrose -PG solution. Positive rates were 759forthe field mice and 1.1% for the overaIl larvae of L. po1lidllm inoculated These resuIts indicate that L. po1lidllm larvae would he the most probable vectors responsible for the occurrence of tsutsugamushi disease patients in the southern and possibly in other parts of Nagano Prefecture. Discrepancy betweenthe absence of reported cases of the disease in lida City and existence of the pathogenic rickettsiae in L. pallidllm and in the field mice may be attributable to inapparent infections and/or infrequent outdoor activities among the inhabitants in the cold season CNovember to January)， when the suburban areas abound in L. pallidllm larvae., Article, 信州大学環境科学論集8:12-15(1986)},
 title = {恙虫類調査のためのマウス設置法},
 year = {1986}
}