You'll get several opinions here. They are probably all good. Remember you are getting this advice over the internet where it is fair to challenge anything you hear.
My take is:
“quarantined for 3-6 months (my disgression)” - good.
“my other snakes shouldn't come into contact with anything it has touched” – good
“breathed” - possible, not probable. The air born pathogens are more probable if your animal room / cage location is hot, humid, and stagnant. It’s more probable that your other captives may infect your new animal!
“ticks” are very obvious. Just pick them off with tweezers. Don’t bother with “Boy Scout First aid techniques”. Antiseptic and Neosporin can’t hurt.
“ mites?” – possible – several commercial products and procedures are good. – I also assume that your friend who collected the animal did not expose it to parasites or pathogens from his collection, including snake bags.
However, if it’s not broke, don’t fix it.
It’s been my experience that good husbandry is best, especially dry cages.
Like most parasites, it’s important that they don’t kill their hosts to continue their life cycles in nature. In a cage that has warm humid places and a convenient host, they can overpopulate and cause allot of damage.
Watch carefully around the eye sockets and under chin shields. Use a good light and a magnifying glass.
“I also know a fecal is in order.” - good – Even a vet who is not great with reptiles, can generally give you a definitive fecal float. (Some exceptions, of course)
“Is that all?” –
The best you can do is know your enemy.
Being a hobbyist with no product or services to hawk here, I have found one of the most practical, down to earth, easy to understand, starting books on parasites, your most probable enemy with animals from a North American temperate climate, is
“Understanding Reptile Parasites”
by Roger J. Klingenberg D.V.M.
(ISBN 1-882770-21-8).
When you’re comfortable with that, if you want more, there are several more technical books that can be recommended.
Summary –
Pay attention to the animal.
Stay with your probabilities, not all possibilities.
Weigh your advice, and “trust the force”.
Don’t be afraid to make mistakes – just learn from them.
Good Luck, You'll do fine.
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Regards, Bill McGighan