Figure 1.

Left image, Portion of adult female Ixodes dammini tick received from patient’s family. The posterior third of the alloscutum was recovered and demonstrates a prominent marginal groove (black arrow), which is present on ticks that have not fed or have fed <24 hours. The posterior margin of the scutum (shield) is also seen (red arrow). In addition, defined gut diverticulae (dark branches under the tegument) are present; these diverticulae swell with an increasing amount of blood). Right image, Nonfed adult female I. dammini collected from vegetation, demonstrating marginal groove (black arrow), intact scutum (red arrow), and prominent gut diverticulae. Scale: Arrow is approximately 3 mm in length.