Pm. Muzzall, Occurrence of Sanguinicola occidentalis Van Cleave and Mueller, 1932 in Perca flavescens and Campeloma decisum from a Michigan Creek, J PARASITOL, 86(6), 2000, pp. 1360-1362
Sanguinicola occidentalis (Trematoda: Sanguinicolidae) infected 58 (48%) of
120 yellow perch collected in 1997 and 40 (50%) of 80 yellow perch collect
ed in 1998 from Silver Creek in lower Michigan. The mean intensity and mean
abundance of this blood fluke were higher in 1998 than in 1997. The fluke
was found in the bulbous arteriosus of the perch heart, free in the petri d
ishes when the gill filaments were teased apart, and in the body cavity was
hings, and 1 individual was associated with an eye. Of the 269 S. occidenta
lis examined from perch, none had eggs. Most perch examined and infected we
re only 1+ yr in age. Spearman's correlation coefficients between S. occide
ntalis intensity and host length in 1997 and 1998 were not significant. An
additional 25 yellow perch (0+ yr in age) collected in 1998 were not infect
ed. Thirty-seven (33%) of 113 snails (Campeloma decisum) examined in July a
nd August 1999 from Silver Creek were infected with S. occidentalis.