- Grey, Babesia-positive; white, Babesia-negative; pos/ex/total, number of positive (positive by amplification of the 18S rRNA gene fragment/number of examined ticks/number of total ticks infesting a rodent); NA, not available. The table displays all B. microti-positive rodents (infested and uninfested with ticks) and out of the Babesia-negative those specimens which were infested with Babesia (Theileria)-positive ticks. * H. concinna, ** I. trianguliceps