The appearance of watery stools does not necessarily indicate the early stages of AIDS. It could be viral gastroenteritis or food intolerance. It is not feasible to diagnose AIDS based solely on the symptom of watery stools, as AIDS symptoms are not very typical or specific. To rule out or confirm an AIDS infection, one can undergo HIV antibody or nucleic acid testing. In the early stages of AIDS, HIV nucleic acid testing is often able to detect the infection.