uth University 中场大 Medical Parasitology Cestode Department of Medical Parasitology
Medical Parasitology Department of Medical Parasitology Cestode
求侧奶③佬取 Central South University 中南大粤 Medical Medical helminthology Medical protozoology parasitology Medical arthropodology i.e.Medical entomology
Medical protozoology Medical helminthology Medical arthropodology Medical parasitology i.e. Medical entomology
ntroduction What is Cestode? Helminths Turbellarians-Free-living worms Phylum Platyhelminths Monogenea Monogenetic flukes Trematodes Digenetic flukes Phylum Nematoda Cestodes Tapeworm
Phylum Platyhelminths Phylum Nematoda Turbellarians Free-living worms Monogenea Monogenetic flukes Trematodes Digenetic flukes Cestodes Tapeworms Helminths What is Cestode? Introduction
承侧斯圆电® ral South University 中大留
求风刻斯■固传取 Central South University 中南大学 Classification Phylum platyhelminth Class Cestoda Pseudophyllidea order Cyclophyllidea
Phylum platyhelminth Class Cestoda Pseudophyllidea Cyclophyllidea Classification order
2州倍 Central South University Common Characteristics of tapeworm They are flat in cross section ·Hermaphroditic Live in the intestines Life cycles are complex and can include multiple intermediate hosts No mouth,no digestive system,have microthrix They have suckers and teeth that grasp the host. Behind a short neck are repeated parts of the worm,each containing reproductive structures with eggs and sperm, which can be released with the host's feces The pieces give the worm a ribbon-like structure, beneficial for absorbing nutrients from the intestine
• They are flat in cross section • Hermaphroditic • Live in the intestines • Life cycles are complex and can include multiple intermediate hosts • No mouth, no digestive system, have microthrix • They have suckers and teeth that grasp the host. • Behind a short neck are repeated parts of the worm, each containing reproductive structures with eggs and sperm, which can be released with the host's feces. • The pieces give the worm a ribbon-like structure, beneficial for absorbing nutrients from the intestine Common Characteristics of tapeworm
Morphology --Adult
Morphology --------Adult
求刻斯■固传取 Central South University 中5lex (looks like the“head) body neck Small,short,Can develop new segments strobilus Immature proglottid Immature productive structure that can extend for only a few Mature proglottid mature productive proglottids or structure thousands Gravid proglottid Full of eggs scolex neck strobila
body scolex neck strobilus Immature proglottid Mature proglottid Gravid proglottid Small,short,Can develop new segments Immature productive structure mature productive structure Full of eggs (looks like the “head”) that can extend for only a few proglottids or thousands scolex neck strobila
ity Scolex Scolex of Diphvllobothrium latum The scolex structure varies among species of tapeworms. a.Diphyllobothrium latum has a scolex with elongated,slit-like attachment organs (bothria) b.Taenia saginata has four muscular SUCKERS C. Taenia solium has similar I.com/product_info.php muscular SUCKERS and a ROSTELLUM with rows of chitinous hooks of Taen
Scolex of Diphyllobo thrium la tum. The scolex structure varies among species of tapeworms. a. Diphyllobothrium latum has a scolex with elongated, slit-like attachment organs (bothria) b. Taenia saginata has four muscular SUCKERS. c. Taenia solium has similar muscular SUCKERS and a ROSTELLUM with rows of chitinous hooks. Scolex of Taenia Solium. http://www.denniskunkel.com/product_info.php ?products_id=813 Scolex of Taenia Saginata Scolex
承侧酬圆传取 Strobila In most cestodes the scolex is tiny when compared to the strobila which makes up most of the actual "worm' The strobila consists of a linear series of proglottids Tape worms are hermaphrodites and each proglottid carries a set of female and male reproductive organs Taenia mature proglottids *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.) http://www.denniskunkel.com/product in 弹r0ducs0813 by P.W.Pappas and S.M.Wardrop)
Strobila *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.) http://www.denniskunkel.com/product_in fo.php?products_id=813 • In most cestodes the scolex is tiny when compared to the strobila which makes up most of the actual “worm” • The strobila consists of a linear series of proglottids • Tape worms are hermaphrodites and each proglottid carries a set of female and male reproductive organs