GROWTH-KINETICS OF THE LYME-DISEASE SPIROCHETE (BORRELIA-BURGDORFERI) IN VECTOR TICKS (IXODES-DAMMINI)

被引:154
作者
PIESMAN, J [1 ]
OLIVER, JR [1 ]
SINSKY, RJ [1 ]
机构
[1] UNIV ALABAMA, BIRMINGHAM, AL 35294 USA
关键词
D O I
10.4269/ajtmh.1990.42.352
中图分类号
R1 [预防医学、卫生学];
学科分类号
1004 ; 120402 ;
摘要
Lyme disease spirochetes (Borrelia burgdorferi) multiplied rapidly in larval Ixodes dammini, reaching a mean density of 2,735 spirochetes/tick on day 15 post-repletion. A 5-fold drop in spirochete levels occurred during the subsequent premolting period. Recently molted nymphs contained a mean of < 300 spirochetes/tick. Following nymphal repletion, spirochete multiplication renewed, reaching a mean abundance of 61,275 spirochetes/nymph on day 75 post-repletion. A 10-fold drop in spirochete abundance occurred again when ticks molted to the adult stage. Tick-derived spirochetes proved to be infectious when > 104 spirochetes were inoculated ip into hamsters (4 of 4 animals infected). Inocula of 103-4 spirochetes were not always infectious (8 of 23 animals infected), and inocula of < 103 spirochetes were insufficient for established infection (0 of 8 animals infected).
引用
收藏
页码:352 / 357
页数:6
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