Identification of a major causative agent of human cercarial dermatitis, Trichobilharzia franki (Müller and Kimmig 1994), in southern England and its evolutionary relationships with other European populations

Table 2 Uncorrected pair-wise distance (p–distance) between different species of Trichobilharzia based on number of base differences per site between sequences of LSU

Species	*T. stagnicolae*	*A. brantae*	*T. szidati*	*T. ocellata*	*T. regenti*	*T. physellae*	*T. querquedulae*	*T. franki*	Ham Ra6	Ham Ra7
*T. stagnicolae*
*A. brantae*	0.037
*T. szidati*	0.015	0.040
*T. ocellata*	0.015	0.040	0.000
*T. regenti*	0.024	0.050	0.009	0.009
*T. physellae*	0.026	0.051	0.011	0.011	0.009
*T. querquedulae*	0.024	0.050	0.009	0.009	0.007	0.006
*T. franki*	0.026	0.051	0.011	0.011	0.009	0.007	0.002
Ham Ra6	0.029	0.055	0.015	0.015	0.013	0.011	0.006	0.004*
Ham Ra7	0.026	0.051	0.011	0.011	0.009	0.007	0.002	0.000*	0.004*
Ham Ra8	0.026	0.051	0.011	0.011	0.009	0.007	0.002	0.000*	0.004*	0.000*

Those numbers highlighted by* are indicative of the Trichobilharzia species sampled from the UK (Ham Ra6 – 8) and their confirmation as T. franki when compared to other species.