Date of Award
Bachelor of Science (B.S.) in Biology and University Honors
Haematoloechus, Frogs -- Parasites, Anura, Host-parasite relationships, Bullfrog -- Parasites, Odonata
The prevalence and intensity of infection by lung flukes (Haematoloechus sp.) was examined by dissecting 1,590 American bullfrogs (Rana catesbeiana) collected between 2013 and 2018, from Conboy Lake National Wildlife Refuge, Washington. Overall infection, across all age classes, was 59.7% (n=1,580) and mean intensity was 17 (n=169; SD=19.3, range=1-166). A logistic regression model showed a significant relationship between infection and frog snout-to-vent length, gape, and collection year. Sex had a significant relationship to infection (χ2=7.31, df=1, P=0.007). Presence of odonates in the stomach was also significantly related to infection (χ2=22.49, df=1, P
Frantz, Bethany, "Haematoloechus Lung Flukes in American Bullfrogs: Prevalence and Associations of Infection" (2019). University Honors Theses. Paper 716.