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Figure 5 | Parasites & Vectors

Figure 5

From: The anterior esophageal region of Schistosoma japonicum is a secretory organ

Figure 5

Tips of anterior esophagus luminal corrugations. A to B, E to G are from adult male; C ,D and H are from female; A and C are to scale. A, Clusters of light vesicles (LV) are evident inside expanded tips of adult males; debris (D) is frequently seen either attached to the surface of corrugations or present between them. Small spheroids (SS), representing sections of cytoplasmic threads, are devoid of vesicles. B, High magnification of the tip of a male corrugation showing four vesicles in different profiles, together with a single mitochondrion. C, Smaller expanded tips of female anterior corrugations, most of which contain only one light vesicle; membranous material (arrowed), evident between corrugations, is attached to the outer surface. D, High magnification of female corrugation tips, showing presence of one or two light vesicles but more prominent mitochondria (MT). E, A general view of male corrugation tips. Small spheroids represent transverse section of cytoplasmic threads lacking vesicles but containing the occasional mitochondrion (starred). Other tips are expanded to accommodate a cluster of vesicles; debris (D) is common in the lumen, much of it membranous (arrowed) and adherent to the surface or to other debris to form irregular shapes. F, Light vesicle with whorls of membrane and a dense spheroid (DS). G, Light vesicle with layers of membranous material attached to the inner surface of the bounding membrane. H, Tip of a corrugation with discoid bodies (DB) and a single light vesicle. Scale bar: A 1 μm; B 200 nm; C 1 μm; D 200 nm; E 2 μm; F 200 nm; G 200 nm; H 200 nm.

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