Abstract
Ixodes scapularis, the black-legged tick, harbors multiple organisms and transmits several pathogens to animals and humans. To determine the presence of tick-borne microorganisms carried by I. scapularis in Pennsylvania, 299 adult I. scapularis ticks were collected from across the state and tested with a multiplex bead panel targeting 20 microorganisms. The Luminex bead-based xMAP® MultiFLEX Mega Tick Panel detected microorganisms in these ticks, including Anaplasma spp. (1.7%), Borrelia spp. (45.8%), Babesia spp. (16.1%), and Rickettsia spp. (22.1%) at the genera level and identified Anaplasma phagocytophilum (1.7%), Babesia microti (0.7%), Borrelia burgdorferi sensu stricto (45.5%), Borrelia miyamotoi (0.3%), and Rickettsia parkeri (0.7%) at the species level. Babesia spp. reactivity was found to be due to Ba. odocoilei, and Rickettsia spp. reactivity was mainly due to rickettsial endosymbionts.
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