Intestinal Taeniasis and cysticercosis
肠绦虫病 Intestinal Taeniasis
病原学 猪肉绦虫 Taenia solium 牛肉绦虫 Taenia saginata 短膜壳绦虫 Hymenolepis nana 长膜壳绦虫 Hymenolepis diminuta 阔节裂头绦虫 Diphyllobothrium latum 犬复孔绦虫 Dipylidium caninum
Morphology Adult tapeworms have three major parts: The scolex The neck The proglottids
Morphology of proglottids tegument microvilli Two muscle layers The nervous system The excretory system There is no digestive system. Male and female gonads
Characteristics of T.saginata and T. solium T. saginata T. Solium Scolex big small square ball 4 suckers 4 suckers no hooks rostellum with hooks Segment 1000-2000 <1000 Length 4-8m 2-4m Egg radially striate radially striate Mature segment Ovary 2 large lobes 1 small and 2 large Gravid segment Uterine branch 15-30 7-12
Life cycle
Epidemiology 1.传染源:病人 2.传播途径:食入 3人群易感性:普遍 4.流行情况:
Pathogenesis obstruction tissue invasion
Clinical Picture subclinical The finding of proglottids fullness, diarrhea, constipation, appetite.
诊断 1 流行病学史 2 临床表现 3 实验室检查 卵Eggs 节片graved proglottid 头节scolex
治疗 1.albendazole 14-15 mg/kg /d 2.Praziquantel 15-20mg/kg once
Children and pigs in the village of Huancyao in Peru, an area of high cysticercosis transmission