Here's the info on Virus.

Many virus diseases infect Orchids but diagnosis can be difficult; virus symptoms often resembles less serious problems.

Symptoms:
Black, red or yellow spots or steaks appear on leaves. Flowers may have white or brown streaks or mosaic patterns.

Treatment:
Have plant tested to confirm diagnosis. Plant viruses are incurable; destroy infected plants. Plants may carry visruses without showing symptoms, so always sterilize tools before use on each plant.

Check also "leaf spot" fungus such as Cercospora or Colletotrichum.

Symptoms:
Leaves have sunken, purplish brown or black spots. Spots start as yellow areas on leaf undersides, becoming more visible on both sides of leaf as they darken.

Treatment:
Take plant outdoors and spray with a fungicide containing benomyl. Remove badly damaged leaves. Leaves with a few spots may be left on plant. It is a rare orchid that doesn't have a spot or two.

From "All About Growing Orchids" by Ortho

For more info on Orchids, please visit the
American Orchid Society's website at

http://orchidweb.org/

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Amor est vitae essentia.
Love is the essence of life.