Vector Competence
For hard (Ixodid) ticks it is virtually impossible for mechanical transmission to occur on its own (i.e. without some replication), as they tend to not take multiple blood meals from different hosts in the one stage. Passing an organism between tick stages (trans-stadial transmission) seemingly requires that an organism can also replicate within the tick.
Read more about this topic: Ixodes Holocyclus
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