I agree exactly with the advice you had on the urology forum. Your own statement is exactly correct: if caused by an STD, urine cloudiness would be due to pyuria (white blood cells). Cloudy urine without WBC is never due to infection of any kind, but generally is related to fluid and food intake and urine acid/alkalinity balance. The most common specifiuc cause is phosphate crystals, which clears with urine acidification -- exactly as you described on the urology forum. Your statement on that forum about chlamydia altering urine acid-alkaline balance is untrue; I have never heard of such a thing.
If you are at risk for STD (unprotected sex with new or multiple partners, etc), then for peace of mind you might visit your local health department STD clinic or your primary care provider and request a urine test for chlamydia and gonorrhea. You can expect negative results -- but if positive, it is unrelated to your cloudy urine.
You really should drop this entire line of reasoning. In my 30+ years in the STD business, I have never seen or heard of any case of gonorrhea or chlamydia that presented with cloudy urine as a symptom. Technically WBCs in the urine could make it cloudy, but usually not. The inflammation in these STDs is limited to the urethra; after washout by bladder urine, there would not be enough WBC to make the urine cloudy. And if there were, that would mean very dramatic urethral inflammation, which would have to be apparent as a very obvious abnormal discharge of pus from the penis. Even in standard UTI, the urine usually is only faintly cloudy, if at all.
Rely on the lab test results for chlamydia and gonorrhea when you receive them. Forget everything else.
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