I've actually been shown Hydatids - the last time our vet showed us some he'd collected via his work - as part of puppy pre-school and why you worm your dog.
They're more commonly known as tape worms in Australia and people and dogs can get them. And some very deluded people have been known to take them as a "weight loss aid" - fine if they lodge in the gut but they tend not to discriminate and will quite happily lodge anywhere in the body including the brain which really messes with a person's ability to think clearly.
Given that none of our cities are entirely wildlife free - or even sheep free (seen those big transport trucks full of them? And people like to buy sheep manure for their gardens... there is the potential for Hydatids anywhere. Foxes also carry Hydatids and they live right through Australian urban areas.