Fig. 3
From: Cystic echinococcosis in northern Tanzania: a pilot study in Maasai livestock-keeping communities
Example images of active (a, b) and inactive (c) echinococcal cysts diagnosed by ultrasound in communities of Ngorongoro. a 13-cm CE3a cyst showing detached parasitic membranes (arrow) but also small daughter cysts (arrowhead). b 4.5-cm CE2 cysts characterized by daughter cysts filling the entire cyst. c 5.6-cm CE4 cyst characterized by the “ball of wool” appearance of the folded parasitic membranes in the pseudo-solid matrix filling the cyst cavity. See section Prevalence of abdominal cystic echinococcosis in humans for description of cyst stages