Co-infection of ticks is the rule, not the exception
French scientists collected Ixodes ticks from nine locations in northern France and tested them for 38 pathogens. They found that almost half of the ticks carried at least two diseases, while many carried up to five.
Results have been published in PLOS, under the title Co-infection of Ticks: The Rule Rather Than the Exception. (This is an open access article.)
More discussion of this research on GenomeWeb: