Could be fusarium wilt on a oncidium?

[jrguevar]

Hi everyone! Now I would like to show/ask about a plant they gave me as a gift last weekend; Ive read somewhere that when you make a cut in a plant section and find a red/maroon ring around the cross section you made, Its one of the symptoms for fusarium wilt, the plant they gave me was relatively big and, and Ive found various sections like the one pictured. So its posible that all the plant is infected? any advice about it?... its a oncidium stenoglossum, at 1250m in the tropics