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Second Recorded Case of Human Infection by Echinococcus Oligarthrus
The paper reviews a previously published case of hydatid disease in the human heart of a Brazilian person who died of tetanus. Based on present knowledge about the distinguishing characteristics of Echinococcus granulosus, E. vogeli, and E. oligarthrus, it was recognized that the infection was due to E. oligarthrus, mainly based the morphologic features of the hooklets of the protoscolex. This is the second human infection due to E. oligarthrus and the first showing wall features of cysts. Therefore, some human infections of polycystic hydatid disease observed outside the range of the bush dog, the only definitive host of E. vogeli (Panama to Northern Argentina), may be due to E. oligarthrus rather than to E. vogeli.