[Long-term monitoring of leukocyturia and bacteriuria after acute obstructive pyelonephritis]

The generally accepted standard of antibiotic therapy aimed at causative agent does not exclude the risk of acute obstructive pyelonephritis (AOP) to become chronic after the end of antibiotic therapy, resulting in a high incidence of relapses. To assess the outcomes of the AOP, we undertook a prospective clinical trial. MATERIALS AND METHODS: The study comprised 51 consistently selected patients (12 men and 39 women) with AOP occurred as a result of unilateral ureteric calculus obstruction. Inclusion criteria for the study were as follows: no history of urological diseases, including urinary stones; the first presentation to the urologist with AOP; the level of the bladder bacteriuria before the drainage of the obstructed kidney more or equal 103 CFU/ml. Bladder urine samples were collected for bacteriological examination by catheterization. At one, 3 and 6 months after completion of the treatment of AOP, the patients underwent a general clinical examination, and midstream specimens of urine were collected from the patients for bacteriological analysis to control leukocyturia and bacteriuria. RESULTS: Eradication of causative uropathogens from urine occurred within 6 months in 96.1% of patients, and at that point, leukocyturia persisted in 23.5% of the patients. The decrease in detecting uropathogens in the urine was accompanied by an increase in the frequency of the presence in the urine of other aerobes and anaerobes, i.e., no sterile urine cultures were obtained from any patient. The rates of eradication of uropathogens were associated with the patients age, the duration of the pre-hospital stage of AOP, and the complicated course of AOP.

[Antimicrobial resistance of uropathogens in patients with acute obstructive pyelonephritis]

RELEVANCE

Acute pyelonephritis is known to be the most complicated and severe urinary tract infection occurring in all age groups and accounting for 14% of all kidney diseases. The generally recognized standard antibiotic therapy cannot completely prevent the progression of the disease to its chronic form after relief of its acute manifestations thus leading to a high incidence of relapses. The aim of our study was to investigate the spectrum of uropathogens and their antibiotic sensitivity in acute obstructive pyelonephritis.

MATERIALS AND METHODS

The study comprised 72 patients who underwent semi-rigid ureteroscopy and ultrasonic lithotripsy for ureteral stones. In all patients, bladder urine samples collected by a transurethral catheter were tested bacteriologically using an extended set of culture media within 3 hours after hospital admission. Antibiotics used in antibiotic sensitivity testing for all uropathogens, were grouped into 4 classes (carbapenems, fluoroquinolones, cephalosporins, penicillins). Etiotropic treatment was started upon the availability of the spectrum of microbial patterns, the level of bacteriuria and antibioticogram of uropathogens, 5-6 days after administering initial empirical antibiotic therapy.

RESULTS

The study patients had a high detection rate (83.3%) of canonical uropathogens in the bladder urine identified due to using an extended set of culture media, with a bacteriuria of more or equal 103 CFU/mL. Given the results of local antibiograms, a rational antimicrobial therapy should include carbapenems, namely ertapenem or meropenem as initial empirical antibiotics. Using fluoroquinolones as the first line treatment can lead to an inadequate effect in 15.0 to 67.0% of the cases. The findings of the antibiotic resistance testing of uropathogens to cephalosporins and semisynthetic penicillins showed that they should not be used as initial empirical antibiotic therapy for acute obstructive pyelonephritis in the given department of urology.

[Is bacteriological testing of bladder urine informative in acute obstructive pyelo- nephritis?]

The problem of the etiology and pathogenesis of acute obstructive pyelonephritis (OOP) remains one of the challenging issues of modern urology. Etiological agents of pyelonephritis can be both gram-negative and gram-positive opportunistic bacteria mostly belonging to the normal flora in humans. The generally accepted diagnostic work-up involves a bacteriological testing of not pelvic urine, but of bladder urine collected by a transurethral catheter or midstream specimens of urine collected from the patients. The aim of our study was to compare the microbiota of bladder and pelvic urine in patients with OOP.

MATERIALS AND METHODS

The study comprised 72 sequentially selected patients (12 men and 60 women) with OOP associated with ureteral stones. Mean age of patients was 53.7+/-0.5 years. All patients underwent bacteriological examination of the bladder urine collected by a transurethral catheter and pelvic urine obtained after relieving stone-related ureteral obstruction. Urinary diversion was performed using j-j stent and PCN in 64 and 8 patients, respectively. Preoperative prophylactic antibiotics were administered routinely. Bacteriological testing of urine was carried out using an extended set (9-10) of culture media. Empirical antibiotic therapy was initiated only after the restoration of urine outflow from the kidney and continued for 5-6 days until the availability of bacteriological testing results.

RESULTS

Levels of bacteriuria with Enterobacteria, gram-positive pathogens and NAB in two urine samples did not differ significantly (p>0.05). There was a wide range of bacteriuria from 101 to 106 CFU/ml of most microorganisms except @Proteus spp., S. aureus. In bladder urine, the rates of bacteriuria of more or equal 104 CFU/ml for E. coli, Klebsiella spp. and Proteus spp. were 90.9%, 72.7% and 100.0%, respectively. For the remaining microorganisms, predominant bacteriuria was less or equal 103 CFU/ml. In pelvic urine, the rates of bacteriuria of more or equal 104 CFU/ml for E. coli, Klebsiella spp. and Proteus spp. was 71.8%, 40.0% and 66.7%, respectively. Other uropathogens in the pelvic urine mainly had a bacterial count of less or equal 103 CFU/ml. Only the concentration of Corynebacterium spp. in the pelvic urine significantly (p=0.023) differed from that of the bladder urine. There were no significant differences between microbiota of bladder and pelvic urine depending on duration of OOP except higher rates of Corynebacterium spp. in the bladder urine.

[Internal optic urethrotomy in urethral strictures complicates subsequent reconstructive surgery]

The results of open reconstructive operations performed in 86 patients with traumatic urethral stricture show that the efficacy of these operations and frequency of complications are lower in using urethroplasty as a primary treatment while primary internal optic urethrotomy significantly reduces possibility of effective surgery without complications.