Furthermore , infections by E. vogeli and E. oligarthrus ( polycystic echinococcosis ) are considered to be the rarest form of echinococcosis .
Unlike the previous two species of Echinococcus , E. vogeli and E. oligarthrus are limited to Central and South America .
Infections by E. vogeli and E. oligarthrus ( polycystic echinococcosis ) are considered to be the rarest form of echinococcosis .
Unlike the previous two species of Echinococcus , E. vogeli and E. oligarthrus are limited to Central and South America .