O'Grady J P, Yeager C H, Esra G N, Thomas W
J Am Vet Med Assoc. 1982 Dec 1;181(11):1348-50.
Four captive lowland gorillas (Gorilla gorilla gorilla) were subjected to abdominal ultrasonic scanning. Evidence of progressive infection by the enzootic parasite Echinococcus vogeli was observed in all 4 of them. Ultrasonic scanning revealed abdominal disease, with evidence of both hepatic and bowel involvement. Three gorillas subsequently died. Necropsy results validated the ultrasonic diagnoses.