Hepatic alveolar echinococcosis in dogs is an extremely
rare diagnosis in North America. To the best of the authors’
knowledge, only 1 case has previously been diagnosed: in
British Columbia (6). However, in parts of central Europe this
is an emerging issue, in both dogs and humans, associated with
increasing fox populations especially in inner urban areas (5).
Why the current case developed hepatic alveolar echinococcosis
is unclear. However, data from Europe indicate that this clinical
presentation occurs in dogs either as a result of ingestion of a
large number of eggs from the environment, or as a result of an
intestinal infection with the adult tapeworm (i.e., subsequent
to ingestion of an infected rodent) and release of eggs into the
intestinal lumen (7). Since the owners of the dog described here
indicated that “the dog would eat just about anything,” either
route of infection is a possibility for this case. However, either
route would be novel in Ontario. Furthermore, cases of hepatic
alveolar echinococcosis typically are only reported in highly
endemic areas.
Hepatic alveolar echinococcosis in dogs is an extremelyrare diagnosis in North America. To the best of the authors’knowledge, only 1 case has previously been diagnosed: inBritish Columbia (6). However, in parts of central Europe thisis an emerging issue, in both dogs and humans, associated withincreasing fox populations especially in inner urban areas (5).Why the current case developed hepatic alveolar echinococcosisis unclear. However, data from Europe indicate that this clinicalpresentation occurs in dogs either as a result of ingestion of alarge number of eggs from the environment, or as a result of anintestinal infection with the adult tapeworm (i.e., subsequentto ingestion of an infected rodent) and release of eggs into theintestinal lumen (7). Since the owners of the dog described hereindicated that “the dog would eat just about anything,” eitherroute of infection is a possibility for this case. However, eitherroute would be novel in Ontario. Furthermore, cases of hepaticalveolar echinococcosis typically are only reported in highlyendemic areas.
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