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- W1995994549 abstract "Sobhon P., Anupunpisit V., Yuan H. C., Upatham E. S. and Saitongdee P. 1988. Schistosoma japonicum (Chinese): changes of the tegument surface in cercariae, schistosomula and juvenile parasites during development. International Journal for Parasitology18: 1093–1104. The surface of cercariae of S. japonicum (Chinese) and changes following their transformation into schistosomula were observed at 0.5,1, 3,6,12,24 and 48 hand 5,7,10 and 15 days by scanning electron microscopy. The cercarial surface shows two distinct regions: on the head and the body it is mildly undulating and covered throughout with numerous spines that are partially embedded in a thick layer of glycocalyx; on the tail it is highly folded into tall and thin circumferential ridges, spines are confined to the dorsal and ventral aspects and are prominent due to a thinner glycocalyx. Between 0.5 and 12 h following skin penetration, the surface of schistosomula is gradually cleared of glycocalyx, while small blebs and slender microvilli project out from the glycocalyx-free area and from spines. Subsequently, these structures are detached from the surface and thus responsible for the shedding of the original cercarial membrane and glycocalyx. Between 24 and 48 h, schistosomula show little change in the body size in comparison to earlier stages, and most of the surface is still covered with spines but devoid of blebs and microvilli. From day 2 onwards schistosomula are lengthened but with little net growth. Spines decrease in the middle region of the body; and the surface is invaginated by small pits and folded into thin ridges, which result in rapid increase of the surface area. Between days 5 and 7 schistosomula elongate further, and the disappearance of the spines in the middle region becomes even more pronounced, while those remaining are confined only to the anterior and posterior extremities. Ridges and pits are more developed, and the former begin to show regular foldings throughout all parts of the body. Between days 7 and 10 schistosomula grow rapidly and the body is quadrupled in size. Between days 10 and 15 sexes can be differentiated. The male has a flat ovoid shape body, whose ridges and pitting on the surface are highly developed almost to the same extent as in adult parasites, while spines remain mostly on the posterior end. Sensory papillae greatly increase in number, especially on the ventral and lateral aspects and around the suckers. The surface of the female is relatively smooth; ridges are developed only on the posterior part, while the remaining surface is flat and extensively pitted. Spines are present throughout but less concentrated in the middle region." @default.
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- W1995994549 date "1988-12-01" @default.
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- W1995994549 title "Schistosoma japonicum (Chinese): Changes of the tegument surface in cercariae, schistosomula and juvenile parasites during development" @default.
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- W1995994549 doi "https://doi.org/10.1016/0020-7519(88)90080-x" @default.
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