First, breathe. Yes crypto is a nasty collection killer but it's also fortunately fairly rare.
Second, crypto is a totally different parasite from pinworms, and just because your AFT had one doesn't mean he has the other.
Third, since the AFT came with worms, extend his quarantine to six months and have another fecal done at three and six months; my vet only charges $25 for those as follow-ups if there was an earlier office visit.
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