mosquitos, no class
that would concern me too!
although mosquitos are easy to raise, and can be excellent feeders, i would view wild visiting mosquitos as a concern.
not all mosquitos are cross biters, but those that are are considered to be "bridge vectors" of disease, meaning they bite an infected host and then go bite something else.
lets face it, most mosquitos are blood suckers, and the biggest problem with that is, that they have no class whatsoever, and arent picky about their meals. they will just as readily bite a rotten, septic corpse, as they will a healthy human, so the point is, no telling where it was just prior to biting your cham.
dont get me wrong, not trying to cause a panic (the xanthoman would never do that lol!)
that being said, whats done is done, the most common serious diseases of mosquito transmission (in the us), would likely be some form of equine encephalitis, or west nile, both are fairly rare in humans, and years of obsessive cham googling, i have never come across a suspected cham case of either. still, it would bother me, especially if i had an animal as exquisite as that one.
they are attracted to standing water, like yard ponds, watering troughs, or old tires etc. so, if you have anything like that in close proximity, you may be able to at least reduce your future incidents by either moving or getting rid of it.
most mosquitoes arent attracted to bug lights so a bug zapper wouldnt really do any good, but if cash isnt an issue you may want to consider a "mosquito magnet", they can all but rid a fairly large parcel of land , in fairly short order. you might try "allofcraigs.com" there was recently one in there for fairly cheap. i think the smallest size is 1/4 acre, they use a propane flame about the size of a bic lighter flame to heat a small square wafer of ox piss, when they are attracted to the source, they get vacuumed into a cloth bag (requires 110v also)they usually harvest hundreds of mosquitoes a day. just a thought. jmo