Phylum Platyminthes (扁形动物门） Class Trematoda（吸虫纲） Order Digenea （复殖目）
General characters species of flukes
Flukes endemic in china
• Clonorchis sinensis 华支睾吸虫 • Paragonimus westermani 卫氏并殖吸虫 • Schistosoma japonicum 日本血吸虫 • Fasciolopsis buski 布氏姜片吸虫 • Pagumogonimus skrjabini 斯氏狸殖吸虫
shape Sesame like, broadly ovoid
shell With a distinct convex operculum
Containin a miracidium inside the egg
g
Liver flukemorphology
2.egg size color shape shell Containin
华支睾吸虫(Clonorchis sinensis) 肝吸虫(liver fluke）
introduction
Firstly found in a Indian Chinese’s bile duct in 1874.
causing Clonorchiasis
华支睾吸虫(Clonorchis sinensis)
Medical helminth
Nemotoda Cestoda Trematoda
Liver Fluke.Vocabulary
Dioecism [dai‘i:sizəm]雌雄异体 Hermaphroditic [hə:mæfrɔ‘ditik]雌雄同体 Miracidium [‘mairə‘sidiəm]毛蚴 Sporocyst [‘spɔ:rə‘sist]胞蚴 Encyted metacercaria [‘metəsə:’kɛəriə]囊蚴 Rediae 雷蚴 Cercariae 尾蚴 Encyst-excyst 成囊-脱囊
Liver Fluke.Vocabulary
Bile 胆汁 Clonorchiasis [’kləunɔ:’kaiəsis] 肝吸虫病 Intrahepatic bile duct 肝胆管 Pancreatic 胰腺的 Gall bladder 胆囊 Faeces [’fi:si:z] 粪便 Diarrhoea [’daɪə ’rɪə]腹泻 putrescent[pju:’tresnt] 坏死
• Leave-shaped,flat
• Hermaphroditic (except Schistosome)
• have mouth but no anus • With oral sucker and ventral sucker • Most fluke’s egg has a operculum
Uterus 子宫 Overy 卵巢 Intestine branch
Spermary睾丸
10-25×3-5mm
Liver flukemorphology
1.Adult worm
Liver flukemorphology
2.egg
size
29×17um，
color Light yellowish-brown
Mophology Life cycle
asexual generation
metagenesis
Sexual generation
General characters species of flukes
More than 30 species of flukes parasitic in human body, all belong to
Miracidium
Liver flukemorphologyother stages
3.Other stage
sporocyst
Liver flukemorphologyother stages
3.Other stage
rediae
Generation cell Unmature Cercariae
Liver Fluke.Vocabulary
Hepatocirrhosis [’hepətəusi’rəusis] 肝硬化 Atrophy [’ætrəfi]萎缩 ascites [ə’saiti:z]腹水
Trematodes, Flukes
General characters
General characters Mophology
肝吸虫(liver fluke）
• Morphology • Life cycle • Pathogenesis • Diagnosis • Prevalence • Prophylaxis
Liver flukeMorphology
1.Adult worm
Oral sucker Gullet 咽 Ventral sucker
Liver flukemorphologyother stages
3.Other stage
Cercariae
Liver flukemorphologyother stages
3.Other stage
Fresh water fish
Encysted metacercariae in fish
卵盖operculum 肩峰shoulder
卵壳 shell 毛蚴 miracidium
疣状突起 tiny knob
g
Liver flukemorphology
2.egg
蠕虫卵中我最小， 形似芝麻棕黄色。 上有盖来下有疣， 肩峰明显内毛蚴。
Liver flukemorphology
3.Other stage
General characters
Mophology Life cycle
Definitive hostபைடு நூலகம்
Adult worms
eggs
Second intermediate host
Miracidia
cercaria Sporocyst
Rediae First
intermediate host
General characters