According to this article, ixodid ticks Ixodidae are common on these turtles.    From Wordnik.com.  [Turtle and its hitchhiker] Reference

All of the 32 members of the Nairovirus genus are transmitted by argasid or ixodid ticks, but only three have been implicated as causes of human disease: the Dugbe and Nairobi sheep viruses, and CCHF, which is the most important human pathogen amongst them.    From Wordnik.com.  [Chapter 2] Reference

Both Theileria parasites are transmitted by ixodid ticks, causing fatal cattle diseases in large parts of Africa and Asia, respectively.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

(1988) Development of Borrelia burgdorferi in ixodid tick vectors.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference