How ticks get under your skin: insertion mechanics of the feeding apparatus of Ixodes ricinus ticks.
Proc Biol Sci
; 280(1773): 20131758, 2013 Dec 22.
Article
in En
| MEDLINE
| ID: mdl-24174106
ABSTRACT
The tick Ixodes ricinus uses its mouthparts to penetrate the skin of its host and to remain attached for about a week, during which time Lyme disease spirochaetes may pass from the tick to the host. To understand how the tick achieves both tasks, penetration and attachment, with the same set of implements, we recorded the insertion events by cinematography, interpreted the mouthparts' function by scanning electron microscopy and identified their points of articulation by confocal microscopy. Our structural dynamic observations suggest that the process of insertion and attachment occurs via a ratchet-like mechanism with two distinct stages. Initially, the two telescoping chelicerae pierce the skin and, by moving alternately, generate a toehold. Subsequently, a breaststroke-like motion, effected by simultaneous flexure and retraction of both chelicerae, pulls in the barbed hypostome. This combination of a flexible, dynamic mechanical ratchet and a static holdfast thus allows the tick to solve the problem of how to penetrate skin and also remain stuck for long periods of time.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ixodes
/
Feeding Behavior
Limits:
Animals
Language:
En
Journal:
Proc Biol Sci
Journal subject:
BIOLOGIA
Year:
2013
Document type:
Article
Affiliation country: