Folia Parasitol (Praha). 1998;45(1):67-72.
Hubálek Z1, Halouzka J, Juricová Z.
QUOTE- "Among 3464 female mosquitoes (Culicidae) of 6 species, 4.1% contained spirochaetes: 1.4% of Aedes vexans Meig., 1.3% of A. cantans (Meig.), 2.2% of A. sticticus (Meig.), 2.2% of Culex pipiens pipiens L. and 5.9% of C. p. molestus Forskal. Borreliae were also detected in 8.4% of 142 fleas (Siphonaptera, largely Ctenophthalmus agyrtes Heller and Hystrichopsylla talpae Curtis) collected from small mammals."
Link Here
https://www.ncbi.nlm.nih.gov/pubmed/?term=Investigation+of+haematophagous+arthropods+for+borreliae+