リケッチア陽性および陰性フレッチェリ－およびチャングライツツガムシの生活史の比較

抄録

1) Each Orientia tsutsugamushi infected L. fletcheri laid 135 eggs on average, but less than the 172 eggs per un-infected female. Each infected and un-infected chiangraiense laid 410 and 436 eggs on average, respectively.
2) The developmental period (days) for each stage (egg, unfed larva, engorged larva, protonymph, deutonymph and tritonymph) of an un-infected fletcheri was almost similar to that of an infected one, but that of deutonymph of an infected chiangraiense was significantly longer than that of an uninfected one. Also, the period from egg to adult in an infected L. chiangraiense was significantly longer than that of an uninfected one.
3) Both infected fletcheri and chiangraiense produced only females, but uninfected females of both species produced different sexes of progeny, ie., only females, only males or both sexes in varied proportions by individual females.
4) Filial infection rate of O. tsutsugamushi from infected females to F1 progeny in both L. fletcheri and L. chiangraiense was 100 and 94%, respectively.