There is no known disease called "cockatoo" that affects humans. The term "cockatoo" refers to a type of bird, not a disease. It's possible you may be thinking of a different term or have encountered misinformation.
Cockatoos are known to carry some bacteria and parasites, but these are generally not harmful to humans. However, it's always best to practice good hygiene when interacting with birds, such as washing your hands thoroughly after handling them.
If you are concerned about a specific health issue, it's essential to consult a medical professional for accurate information and diagnosis.