The ultrastructure of epimastigotes of Trypanosoma cruzi, obtained from acellular cultures, and bloodstream trypomastigotes, isolated from infected mice, were studied by thin-sectioning and freeze-fracturing techniques. Epimastigotes showed a thin (5 nm) surface coat when stained with ruthenium red, while the surface coat of trypomastigotes was more prominent (15 nm thick). Both P and E faces o...

Granuloma annulare (GA) is an idiopathic benign skin disease, characterized by annular dermal plaques or papules. Much is still unknown concerning its aetiology, association, and pathogenesis.We report two patients with generalized GA (GGA), with different age of presentation, co-morbidities, and disease morphology. Herein, we report two patients with GGA with different clinical features,...

The natural diet of northern temperate tadpoles is a largely neglected area of study. We investigated the natural diets in three anuran larvae, the wood frog (Rana sylvatica), the American toad (Bufo americanus), and the spring peeper (Pseudacris crucifer), from several ephemeral ponds in northern Minnesota. Previous laboratory studies suggest that these species, as well as others with similar ...