Does drinking alcohol in reasonable amount by healthy individual (non alcoholic) having UTI helps to kill bacteria in the urinary tract (in order to get rid of them quicker)?
To begin answering your question,
Does drinking alcohol in reasonable amount by healthy individual (nonalcoholic) having UTI helps to kill bacteria in the urinary tract (in order to get rid of them quicker)?
We have to clarify that EtG detects ethyl glucuronide which is a byproduct of ethanol and remains in the urine for several day. The presence of ethyl alcohol in urine is significantly shorter somewhere between 8-12 hours (reference).
So what does this mean? Well, in order to "kill" the bacteria causing the UTI it must be exposed to a minimal inhibitory concentration of ethyl alcohol for a certain amount of time. Depending on the bacteria causing the infection this concentration and exposure time varies.
So if the concentration of ethyl alcohol was high enough and the flow of your urination and micturition long enough, maybe, but is unlikely to have much effect.
Drinking alcohol does not seem to be effective treatment for urinary tract infections.
In this study, drinking 0.85 g ethanol/kg body weight (60 g ethanol or ~150 mL of 40% ABV spirit by a 70 kg person) resulted in 1 g of ethanol in the urine. 1 g of ethanol in 200 mL of urine = 0.5% alcohol.
According to CDC:
In the healthcare setting, “alcohol” refers to two water-soluble chemical compounds—ethyl alcohol and isopropyl alcohol...These alcohols are rapidly bactericidal rather than bacteriostatic against vegetative forms of bacteria; they also are tuberculocidal, fungicidal, and virucidal but do not destroy bacterial spores. Their cidal activity drops sharply when diluted below 50% concentration, and the optimum bactericidal concentration is 60%–90% solutions in water (volume/volume).
In this study, the minimal inhibitory concentrations (MIC) and antimicrobial effects of ethanol on Listeria monocytogenes in tryptic soy broth was determined. Ethanol at concentrations up to 1.25% did not inhibit growth, but growth was strongly inhibited in the presence of 5% ethanol.
According to BJPS, the minimal inhibitory concentration of ethanol is 4-9%.
A typical symptom of urinary tract infection is frequent and burning urination. Alcohol irritates the bladder, so it can make the symptoms worse (Mayo Clinic).