I don't think hospitals have any motivation to hide antibiotic-resistant infections ("superbugs") specifically. HOWEVER, the motive to hide hospital-acquired infections[0] is clear!
Here's some mud in the water: what's the difference between a HAI with some bug that is easily killed by antibiotics vs. an antibiotic resistant bug?
As for "tracking it in secret", that's one way to put it, but it will cloud your thinking. :) Your own medical records--specifically blood test lab results--have your name, address, and phone number on them. Consider replacing the word 'secret' with 'private' and re-working the whole thought.