Acute pyelonephritis focusing on perfusion defects on contrast enhanced computerized tomography(CT) scans and its clinical outcome

Ascending renal infection following experimental candiduria by Candida tropicalis in immunocompromised mice

The present study evaluated renal infection resulting from the implantation of C. tropicalis in the bladder of immunosuppressed mice. Yeasts were implanted in two manners: planktonic and via preformed biofilm on a small catheter fragment (SCF). Renal histopathology and cultures was performed 72 and 144 h after cystotomy was carried out in mice from three groups: group I contained non-contaminated mice implanted with a sterile SCF; group II mice received a sterile SCF plus a yeast suspension containing 1 × 107 yeasts/mL in a planktonic form; group III mice were implanted with a SCF containing preformed C. tropicalis biofilm. Viable yeasts were found in the kidneys of mice from both groups II and III. However, after 72 h the planktonic cells (group II) invaded more quickly than the sessile cells (group III). Over a longer period (144 h), group III exhibited a more invasive infection (50% of the animals presented renal infection and the renal fungal load was 3.2 log10 CFU/g tissue) than in group II, where yeasts were not found. C. tropicalis introduced into the bladder in two ways (in planktonic or biofilm form) were able to reach the kidney and establish a renal fungal infection, causing interstitial disorders. The data of the present study therefore support the hypothesis of an ascending pathway for renal infections by C. tropicalis. Furthermore, the biofilm resulted in a greater and progressive risk of renal infection, attributed to the slow detachment of the yeasts.

Acute Pyelonephritis - Correlation of Clinical Parameter with Radiological Imaging Abnormalities

INTRODUCTION

Pyelonephritis (PN) is a suppurative infection of the kidney, most commonly due to bacterial infection and may be either acute or chronic. Acute PN (APN) subdivided into uncomplicated and complicated. Severity of PN cannot be assessed by clinical or laboratorial parameters alone, radiological imaging such as Ultrasound (USG) abdomen, Computed Tomography (CT) is required to know the nature, extent and severity of disease and for planning interventions.

AIM

The aim of this study was to compare clinical and biochemical parameters with radiological findings (USG/CT) among patients diagnosed to have PN.

MATERIALS AND METHODS

The medical records of all patients admitted with PN at the Institute of Nephrourology, Bangalore from January 2016 to December 2016 were reviewed. Their clinical and biochemical parameter were compared with radiological findings. Statistical analysis was performed with Statistical Package for the Social Sciences (SPSS) Version 15.0.

RESULTS

There were 100 patients diagnosed with PN in the study period. Mean age of patient was 48.7 years and PN was common among females (62%). Classical triad of PN was present in 87% of patients. Acute kidney injury was present in 47% of patients. Diabetes (69%) was the most common comorbid condition. Positive urine culture was found in 24% of patients. USG abdomen was performed in all patients and it was suggestive of APN in 66% cases. CT abdomen was available for 74% and it revealed PN in 70%, of patients. Among these Emphysematous PN (EPN) was found in 4% and renal abscess in 3% of patients. In this study, USG findings of PN were correlated with triad of PN symptoms and those who had PN for the first time.

CONCLUSION

In this study, majority of the patients presented with clinical triad of PN-fever, flank pain and dysuria. Urine culture was positive only in few cases. USG was able to diagnose large number of PN cases except emphysematous change and renal abscess which was detected by CT. The detection of PN was better with CT when compared to USG.

Acute Pyelonephritis and Renal Abscesses in Adults—Correlating Clinical Parameters with Radiological (Computer Tomography) Severity

Introduction: The aim of this study is to evaluate the correlations between clinical and biochemical parameters with radiological severity of CT diagnosed acute pyelonephritis (APN) and renal abscesses, thereafter defining clinical predictors to identify patients with severe APN or renal abscesses. Materials and Methods: The inpatient medical records of all patients diagnosed with APN or renal abscesses admitted over one year were reviewed. Patients with CT imaging performed were classified into 3 groups—mild APN, severe APN and renal abscesses. Clinical and biochemical parameters were correlated with radiological severity. Results: One hundred and thirty patients were included in the study. Male gender, older age, presence of diabetes mellitus and unobstructing renal stones were significantly associated with severe APN or renal abscesses. Clinical and biochemical parameters that were associated with more severe disease include a higher leucocyte count and C-reactive proteins, left neutrophil shift, thrombocytosis or thrombocytopenia, low serum albumin, acute renal impairment and bacteremia. The percentage of patients had positive urine and blood cultures were 40.8% and 30.7% respectively. Of these patients, 97.9% had severe APN or renal abscesses on CT imaging had diabetes mellitus (DM), hypotension, acute renal failure or leucocyte count of >20K. Conclusion: Our study showed a good correlation between clinical and radiological severity in adult patients with APN and renal abscesses. Patients with severe APN or renal abscesses were likely to be diabetics presenting with hypotension, acute renal impairment and a leucocyte count of greater than 20K. Key words: Computer topography (CT), Pyelonephritis, Renal abscess, Severity