Journal
VACCINES
Volume 9, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/vaccines9040385
Keywords
Ixodes ricinus; artificial tick feeding; in vitro tick feeding; vitamin B; life cycle
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Funding
- German Federal Ministry of Education and Research (BMBF) [01KI1720]
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The life cycle of the hard tick Ixodes ricinus was completed for the first time in vitro, with longer feeding times, lower engorgement weights, and a significant improvement in feeding efficiency with the supplementation of vitamin B.
The hard tick Ixodes ricinus is an obligate hematophagous arthropod and the main vector for several zoonotic diseases. The life cycle of this three-host tick species was completed for the first time in vitro by feeding all consecutive life stages using an artificial tick feeding system (ATFS) on heparinized bovine blood supplemented with glucose, adenosine triphosphate, and gentamicin. Relevant physiological parameters were compared to ticks fed on cattle (in vivo). All in vitro feedings lasted significantly longer and the mean engorgement weight of F-0 adults and F-1 larvae and nymphs was significantly lower compared to ticks fed in vivo. The proportions of engorged ticks were significantly lower for in vitro fed adults and nymphs as well, but higher for in vitro fed larvae. F-1-females fed on blood supplemented with vitamin B had a higher detachment proportion and engorgement weight compared to F-1-females fed on blood without vitamin B, suggesting that vitamin B supplementation is essential in the artificial feeding of I. ricinus ticks previously exposed to gentamicin.
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