曼氏迭宫绦虫 Spirometra mansoni

Spirometra mansoni 曼氏迭宫绦虫 General introduction DIstributed worldwide, mainly in southeast Asia LArval infection of S. mansoni may cause serious clinical disease ---sparganosis sparganum (From: Parasite of the Month)

Spirometra mansoni 曼氏迭宫绦虫 General introduction ※Distributed worldwide, mainly in southeast Asia. ※Larval infection of S. mansoni may cause serious clinical disease ---Sparganosis

Morphology X Adult worm measures 60-100 cm in length X Scolex is elongated and spoon-shaped. It is characterized by the presence of two sucking grooves X Consists of about 1000 proglottids X Gravid proglottids are similar with mature proglottids

Morphology ※ Adult worm measures 60-100 cm in length ※ Scolex is elongated and spoon-shaped. It is characterized by the presence of two sucking grooves. ※ Consists of about 1000 proglottids. ※ Gravid proglottids are similar with mature proglottids

卵黄 睾丸 生殖孑 于宫 阴道 输精 系的 子官 卵巢 卵模 Gravid proglottid

Gravid proglottid

Egg 52-78um×31-44um Light yellow in color Operculum

Egg 52-78 µm ×31-44 µm Light yellow in color Operculum

Plerocercoid/ Sparganum tape-like, unsegmented bod white in color Infective stage cm

Plerocercoid / Sparganum tape-like, unsegmented body white in color Infective stage

The Life Cycle of Spirometra mansoni Life cvcle Scolex Requires two s普 Adult intermediate hosts and Gravid one definitive host proglottids final host Immatul adult DOG MAN CA Coracidium the second the first Six-hooked intermediate host intermediate host oncosphere Plerocercoid Procercoid

Life cycle Requires two intermediate hosts and one definitive host

Definitive host: dog cat etc 4. 1st intermediate host: fresh water copepod o 2nd intermediate host: frog .o Transport(paratenic/transfer) host: snake, bird, mammal . Human can serve as the second intermediate host transport host and even the definitive host (rarely) o Infective stages: plerocercoid /sparganum(transport host), procercoid( the second intermediate host

❖ Definitive host: dog, cat etc ❖ 1 st intermediate host: fresh water copepod ❖ 2 nd intermediate host: frog ❖ Transport (paratenic/transfer) host: snake, bird, mammal ❖ Human can serve as the second intermediate host, transport host and even the definitive host (rarely) ❖ Infective stages： plerocercoid / sparganum(transport host), procercoid (the second intermediate host)

.s Mode of infection *drinking-water by ingesting copepods infected with procercoid t ingesting larvae contained in raw or undercooked meat of animals infected with sparganum a by larval transfer(applying the flesh, such as frog or snake, as poultice on the eye or wound) In Vietnam, Thailand and part areas of China, frogs are popularly believed to have an antiphlogistic effect, and their muscles are applied as poultices. This custom is responsible for ocular sparganosis

❖ Mode of Infection: ☆drinking-water by ingesting copepods infected with procercoids. ☆ ingesting larvae contained in raw or undercooked meat of animals infected with sparganum ☆ by larval transfer (applying the flesh, such as frog or snake, as poultice on the eye or wound). In Vietnam, Thailand and part areas of China, frogs are popularly believed to have an antiphlogistic effect, and their muscles are applied as poultices. This custom is responsible for ocular sparganosis

SSE ODICINAIES CUM JUGODE RANA