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Sarcocystosis (sarcosporidiosis) 

Sarcocystosis (sarcosporidiosis)
Sarcocystosis (sarcosporidiosis)

John E. Cooper


August 28, 2014: This chapter has been re-evaluated and remains up-to-date. No changes have been necessary.


Epidemiology—recent possible outbreak in travellers from Tioman island, west Malaysia.

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date: 24 September 2021

Sarcocystosis is characterized by the invasion of muscles and sometimes other tissues by protozoa of the genus Sarcocystis, of which S. hominis (intermediate host domestic cattle) and S. suihominis (domestic pig) are the most significant to humans, to whom they are transmitted by ingestion of uncooked beef or pork. Humans serve as either intermediate or final host: (1) intermediate host—presence of cysts in muscle is usually asymptomatic, but may cause myositis or myopathy; detected on clinical examination or muscle biopsy; (2) final host—may be asymptomatic or cause fever and gastrointestinal upset; oocysts or sporocysts can be detected in faeces. There is no specific treatment. Prevention is by not eating uncooked meat from any animal....

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