@techreport{oai:soar-ir.repo.nii.ac.jp:00017084,
 author = {内川,  公人 and 山田,  喜紹 and 熊田,  信夫},
 month = {Mar},
 note = {Although an old record of tsutsugamushi disease appeared in 1810， the first quotable case of the disease was noted in 1952 in Nagano prefecture. Sporadic occurrence of the disease was reported exclusively from the Omachi-Kitaazumi district mainly in the fall from that time on until the eighth patient was encountered in 1967. After al apse of 14 years，'t he reoccurrence of the endemic was manifested with the 6 patients diagnosed clinically and serologically in 1981， and the number of the recent patients came up to 27 by the end of 1983. Geographical distribution of the patients had a partiality to. the northern part of the prefecture， inclusive of the Omachi-Kitaazumi district. Slasonally， about 4 fifths of the patients occurred in spr・ingand the remainders in autumn. In 1983， collection of Leptotrombidium pallidum，t he presumed vector chigger in Nagano prefecture，b y the black board method and examination of chiggers parasitic or phoretic on the pheasant， Phasianus colchicus， supplemented the study of the chigger mites that had been carried out i!l 1981 and 1982. L. pallidum and other chiggers seldom climbed up on the black board even though they were extracted from soil and organic matter under the board. Besides the well knownparasite chiggers of the pheasant， Helenicula miyagaa and Neoschoengastia shiraii， a small number of L. pallidum， L. intermedium and Neotrombicula japon usually parasitic on rodents were found phoretic on the female bird., Article, 信州大学環境科学論集6:66-74(1984)},
 title = {長野県における恙虫病の発生と媒介ツツガムシ類に関する調査の現状},
 year = {1984}
}