Microfungus???

[mrs.TF]

Hello there,
My little collection grew last week with 5 orchids, somebody gave them to me..one blc., one lc., one iwan., one vanda, one doritis..
Now, at a close inspection, I did found several not so good things..
The doritis has some sunken spots which I don't know what they are..
Vanda has snails, another one has these yellow spots, some other has another type of spots, some yellow, some brown..
It seems to me that it is looking like this..

Image Viewer

The new ones are separated from the rest, so I really hope that if it is the microfungus, it will not spread..
Three of them have buds..so if I were to throw them, I would be very sad..


Thanks a lot.