Journal
VIROLOGY
Volume 535, Issue -, Pages 189-199Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.virol.2019.07.010
Keywords
Fleas; Meta-transcriptomics; Virus discovery; RNA virus; Virome; Stephanocircus; Macropsylla; Pygiopsylla
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Funding
- Australian Research Council (ARC) Australian Laureate Fellowship [FL170100022]
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Fleas are important vectors of zoonotic disease. However, little is known about the natural diversity and abundance of flea viruses, particularly in the absence of disease associations, nor the evolutionary relationships among those viruses found in different parasitic vector species. Herein, we present the first virome scale study of fleas, based on the meta-transcriptomic analysis of 52 fleas collected along the eastern coast of Australia. Our analysis revealed 18 novel RNA viruses belonging to nine viral families with diverse genome organizations, although the majority (72%) possessed single-stranded positive-sense genomes. Notably, a number of the viruses identified belonged to the same phylogenetic groups as those observed in ticks sampled at the same locations, although none were likely associated with mammalian infection. Overall, we identified high levels of genomic diversity and abundance of viruses in the flea species studied, and established that fleas harbor viruses similar to those seen to other vectors.
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