Thrush can be an early sign, and also occur at anytime in a person with HIV. People who do not have HIV can also get thrush, which is an overgrowth of the yeast,candida. Since people with HIV are much more prone to infection, these individuals are more susceptible than a healthy person to contract thrush, and to have it manifest inside the body in places like lungs and esophagus, in addition to oral thrush and vagina, where it most often occurs in otherwise healthy individuals.
Thrush is common in HIV patients, cancer patients, babies, and people of all ages. en.wikipedia.org It is not always a symptom of aids, but a sign of a weak immune system.