Fig. 2

Mature gametocytes (a–d) and sporogonic stages (e–j) of Haemoproteus noctuae (lineage hCIRCUM01) in Culicoides nubeculosus (e, i) and Culicoides impunctatus (g), and Haemoproteus syrnii (hCULCIB01) in C. nubeculosus (f, h, j). Macrogametocytes (a, b) and microgametocytes (c, d) of H. noctuae (a, c) and H. syrnii (b, d) in peripheral blood of donor birds before experimental infection of biting midges. Ookinetes (e, f), oocyst (h) and sporozoites (g, i, j) are shown. Long simple arrows – nuclei of parasites, simple arrowheads – pigment granules, triangle arrowheads – volutin granules, short arrow – oocyst. Scale bar = 10 μm