Sorry to nit pick but I have a pdf of the 4th edition primarily for ease of access but also for looking things up. The word disease is mentioned 29 times. The first is on page 64 as follows:
"Resentment is the “number one’’ offender. It destroys
more alcoholics than anything else. From it stem all
forms of spiritual disease, for we have been not only
mentally and physically ill, we have been spiritually
sick."