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Ticks alter what genes are expressed in their saliva as they feed on their hosts, researchers from the Czech Republic and the US report in PLOS Neglected Tropical Diseases. They performed RNA sequencing on single salivary glands from adult female Ixodes ricinus ticks. These ticks fed on either naturally on a rabbit or through artificial membrane feeding of rabbit blood lacking immune factors prior to the collection of their salivary glands.

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