Medical Microbiology

Platyhelmintha(syn.Platyhelminthes) 567

EchinococcusgranulosusandE.multilocularis:LifeCycles

1a

1b

2

4b^3

4a

3a

5

Fig. 1 0. 9 1a,bAdultparasitesinfinalhosts:E.granulosusindogs,E.multilocularis

inredfoxes(also:dogs,cats,andothercarnivores); 2 gravidproglottidscontaining

eggs; 3 Echinococcuseggs,infectionofnaturalintermediatehostorhumans

(accidentalhost)(3a); 4 naturalintermediatehosts:ofE.granulosus:sheep,cattle,

horses,andotherungulates(4a);ofE.multilocularis:rodents(4b); 5 metacestodes

intheliversofintermediatehosts.

Reddotsinhumanhost:mostfrequentlocationofmetacestodes(seetext).

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Kayser, Medical Microbiology © 2005 Thieme