The parasitic mite Varroa destructor influences flight behavior, orientation and returning success of forager honeybees (Apis mellifera) infested as adults. As impaired orientation toward the nest entrance might be due to deficiency in recognition and responsiveness to stimuli in the environment, we examined effects of V. destructor on sensory responsiveness, nonassociative and associative learning of honey bee foragers -- "The parasitic mite Varroa destructor affects non-associative learning in honey bee foragers" by Jasna Kralj
the short answer is yes.Didn't Seeley find that the bee that survived in the relative isolation of the Arnot Forrest(with mites) would not survive in a bee yard with other hives?
For instance, take a bee yard with 25 hives, if say 5 hives are choosen to be natural, are their chances of survival lessened by being in close proximity to bees that are being treated.No because the ones being treated should have less mites by being treated.All hives will have some mites.Keep your hives strong,60,000 bees you will have no CCD,keep a strong laying queen.Weak queen,weak hive. Or is there some other issue with mixing treated and natural hives?NO