Systematic & Applied Acarology
ISSN 1362-1971
An international journal of the Systematic and Applied Acarology Society, published since 1996

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Systematic & Applied Acarology (2002) 7, 15-22

Ability of Ixodes persulcatus, Haemaphysalis concinna and Dermacentor silvarum to acquire and transstadially transmit the Lyme disease spirochete Borrelia garinii


Institute of Microbiology and Epidemiology of Beijing, Beijing, P. R. China, 100071


To determine the principal vectors of Lyme disease in North China, the capability of I. persulcatus, H. concinna

and D. silvarum to transmit Lyme spirochetes transstadially was estimated under laboratory conditions. Results

suggest that all three tick species can acquire active Lyme spirochetes by feeding on infected KM mice.

However, the three species vary in their ability to maintain spirochetes. Only I. persulcatus can maintain active

spirochetes during molting, with subsequent tick stages infectious to innocent KM mice. Haemaphysalis

concinna and D. silvarum maintain spirochetes no longer than the digestion period of blood; after molting, no

spirochetes were detected in these two tick species. Therefore, I. persulcatus should be considered the principal

vector of Lyme disease in North China. The presence of spirochetes in H. concinna and D. silvarum may be

tied to co-feeding with I. persulcatus.

Key words: Lyme disease, transstadial transmission, laboratory host, tick, H. concinna, D. silvarum

Copyright 1999-2002 Systematic and Applied Acarology Society
Last updated 15 Jul. 2002
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