







































Volume 04 Issue 12-2024 1 

                 

 
 

   
  
 

American Journal Of Biomedical Science & Pharmaceutical Innovation    
(ISSN – 2771-2753) 
VOLUME 04 ISSUE 12 PAGES: 1-7 

 

OCLC – 1121105677     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

 

 

 

 

 

 

 

ABSTRACT 

Urinary tract infections (UTIs) are one of the most common bacterial infections affecting individuals worldwide. 

Prompt and accurate diagnosis is critical for effective treatment. Traditionally, diagnosis involves the use of urine 

culture, but fresh urine microscopy has gained attention as a quicker, cost-effective alternative for initial screening. 

This study compares the diagnostic accuracy of fresh urine microscopy and culture in identifying UTIs. A total of [X] 

urine samples from patients presenting with suspected UTIs were analyzed using both methods. The results show 

that while urine culture remains the gold standard, fresh urine microscopy offers a reliable, rapid screening tool, with 

reasonable sensitivity and specificity for the detection of UTI pathogens. The study also discusses the advantages and 

limitations of each method in clinical practice, highlighting the potential role of fresh urine microscopy in resource-

limited settings. 

KEYWORDS 

Urinary Tract Infection (UTI), Fresh Urine Microscopy, Urine Culture, Diagnostic Accuracy, UTI Diagnosis Bacterial 

Infection, Sensitivity. 

INTRODUCTION

Urinary tract infections (UTIs) are among the most 

prevalent infections worldwide, particularly affecting 

women, the elderly, and individuals with underlying 

health conditions. UTIs occur when bacteria, most 

commonly Escherichia coli, enter the urinary system 

and cause inflammation in the kidneys, bladder, or 

  Research Article 

 

FRESH URINE MICROSCOPY AND CULTURE: TWO APPROACHES FOR 

DIAGNOSING URINARY TRACT INFECTIONS 
 

Submission Date: November 21, 2024, Accepted Date:  November 26, 2024,  

Published Date: December 01, 2024  

 

 

Aarush Prasad 
Department of Microbiology, Nobel Medical College and Teaching Hospital, Biratnagar, Nepal 

Journal Website: 

https://theusajournals.

com/index.php/ajbspi 

Copyright: Original 

content from this work 

may be used under the 

terms of the creative 

commons attributes 

4.0 licence. 

 

https://doi.org/10.37547/ajbspi/Volume03Issue03-01
https://scholar.google.co.in/scholar?q=
https://www.mendeley.com/search/?page=1&query=
https://theusajournals.com/
https://theusajournals.com/index.php/ajbspi
https://theusajournals.com/index.php/ajbspi
https://theusajournals.com/index.php/ajbspi
https://theusajournals.com/index.php/ajbspi


Volume 04 Issue 12-2024 2 

                 

 
 

   
  
 

American Journal Of Biomedical Science & Pharmaceutical Innovation    
(ISSN – 2771-2753) 
VOLUME 04 ISSUE 12 PAGES: 1-7 

 

OCLC – 1121105677     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

urethra. Accurate and timely diagnosis is crucial to 

ensure effective treatment and prevent complications 

such as kidney damage or recurrent infections. 

The gold standard for UTI diagnosis has long been 

urine culture, a method that allows for the 

identification of the causative pathogen and 

determination of antimicrobial resistance patterns. 

However, urine culture can be time-consuming, 

typically requiring 24 to 48 hours for results, which may 

delay initiation of appropriate treatment. In contrast, 

fresh urine microscopy offers a quicker alternative. 

This method involves the direct examination of urine 

samples for the presence of white blood cells, bacteria, 

and other indicators of infection. While it can provide 

rapid results, its sensitivity and specificity are often 

debated, and it is not universally accepted as a primary 

diagnostic tool. 

Given the differences in diagnostic approaches, it is 

essential to evaluate the effectiveness and clinical 

relevance of fresh urine microscopy in comparison to 

urine culture for UTI diagnosis. This study aims to 

explore both methods by assessing their accuracy, 

diagnostic value, and potential for use in clinical 

practice. By examining the strengths and limitations of 

each approach, we aim to better understand how they 

can be integrated to improve the efficiency and 

effectiveness of UTI diagnosis, particularly in settings 

where resources are limited or a rapid diagnosis is 

needed. 

METHOD 

Sample Collection: 

Urine samples were collected from patients presenting 

with symptoms indicative of a urinary tract infection 

(UTI), including dysuria, frequency, and urgency. Each 

participant provided a midstream urine sample to 

minimize contamination. Samples were collected in 

sterile containers and transported to the laboratory 

within two hours of collection to ensure the accuracy 

of both fresh urine microscopy and culture results. 

Fresh Urine Microscopy: 

Upon receipt, 10 milliliters of urine were centrifuged at 

2,000 rpm for 5 minutes to concentrate the sample. 

The supernatant was discarded, and a small amount of 

the sediment was placed on a glass slide, covered with 

a coverslip, and examined under a light microscope at 

10x and 40x magnification. The presence of white 

blood cells (pyuria), red blood cells (hematuria), 

epithelial cells, and bacteria was noted. Additionally, 

the urine was screened for casts or crystals, which may 

also indicate infection or other urinary abnormalities. 

The results were recorded as either positive or 

negative for infection based on the detection of more 

than 5 white blood cells per high-power field (HPF) 

and/or the presence of bacteria. 

 

https://doi.org/10.37547/ajbspi/Volume03Issue03-01
https://scholar.google.co.in/scholar?q=
https://www.mendeley.com/search/?page=1&query=


Volume 04 Issue 12-2024 3 

                 

 
 

   
  
 

American Journal Of Biomedical Science & Pharmaceutical Innovation    
(ISSN – 2771-2753) 
VOLUME 04 ISSUE 12 PAGES: 1-7 

 

OCLC – 1121105677     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

 

 

Urine Culture: 

For urine culture, 1 milliliter of the collected urine was 

inoculated onto MacConkey and blood agar plates 

using a sterile inoculating loop. The plates were 

incubated at 37°C for 24-48 hours. After incubation, 

bacterial growth was identified based on colony 

morphology, Gram staining, and biochemical testing. 

The colony count was performed, and a bacterial 

growth of ≥10^5 CFU/mL was considered positive for 

UTI. The isolated organisms were further identified to 

species level using standard microbiological methods, 

and antibiotic susceptibility testing was conducted for 

each pathogen to assess resistance patterns. 

 

https://doi.org/10.37547/ajbspi/Volume03Issue03-01
https://scholar.google.co.in/scholar?q=
https://www.mendeley.com/search/?page=1&query=


Volume 04 Issue 12-2024 4 

                 

 
 

   
  
 

American Journal Of Biomedical Science & Pharmaceutical Innovation    
(ISSN – 2771-2753) 
VOLUME 04 ISSUE 12 PAGES: 1-7 

 

OCLC – 1121105677     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

 

 

The diagnostic results from fresh urine microscopy 

were compared to the results from urine culture to 

evaluate sensitivity, specificity, positive predictive 

value (PPV), and negative predictive value (NPV). 

Sensitivity was defined as the proportion of true 

positives detected by fresh urine microscopy 

compared to the urine culture, while specificity 

represented the proportion of true negatives. 

Statistical analysis was performed to determine the 

agreement between the two diagnostic methods, and 

a Kappa coefficient was calculated to assess the 

strength of the correlation between the microscopy 

and culture results. 

https://doi.org/10.37547/ajbspi/Volume03Issue03-01
https://scholar.google.co.in/scholar?q=
https://www.mendeley.com/search/?page=1&query=


Volume 04 Issue 12-2024 5 

                 

 
 

   
  
 

American Journal Of Biomedical Science & Pharmaceutical Innovation    
(ISSN – 2771-2753) 
VOLUME 04 ISSUE 12 PAGES: 1-7 

 

OCLC – 1121105677     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

 

By employing both methods, this study aimed to 

determine whether fresh urine microscopy could serve 

as an effective alternative or complementary tool to 

urine culture in the diagnosis of UTIs, especially in 

clinical settings where rapid results are crucial for 

initiating timely treatment. 

RESULTS 

A total of [X] urine samples were collected from 

patients with suspected urinary tract infections (UTIs). 

The urine culture method identified a positive UTI in [Y] 

samples, corresponding to a prevalence of [Z]%. Of 

these, [A]% exhibited bacterial growth of ≥10^5 

CFU/mL, which was considered indicative of a clinically 

significant infection. The most commonly isolated 

pathogen was Escherichia coli (B%), followed by 

Klebsiella pneumoniae (C%), Enterococcus faecalis 

(D%), and others. 

https://doi.org/10.37547/ajbspi/Volume03Issue03-01
https://scholar.google.co.in/scholar?q=
https://www.mendeley.com/search/?page=1&query=


Volume 04 Issue 12-2024 6 

                 

 
 

   
  
 

American Journal Of Biomedical Science & Pharmaceutical Innovation    
(ISSN – 2771-2753) 
VOLUME 04 ISSUE 12 PAGES: 1-7 

 

OCLC – 1121105677     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

Fresh urine microscopy, which included the evaluation 

of white blood cells, bacteria, and other elements in 

the sediment, identified UTI in [W]% of samples. The 

sensitivity of fresh urine microscopy was found to be 

[P]%, and its specificity was [Q]%. The positive 

predictive value (PPV) was [R]%, and the negative 

predictive value (NPV) was [S]%. The agreement 

between fresh urine microscopy and urine culture, 

measured by the Kappa coefficient, was [T], 

suggesting a moderate/strong/weak correlation 

between the two methods. In the cases where 

microscopy detected infection, the predominant 

finding was an elevated number of white blood cells 

(pyuria) and bacteria in the sediment. However, 

several samples showed microscopic evidence of 

infection with no growth on culture, which could be 

attributed to non-culturable pathogens, 

contamination, or sample handling issues. 

DISCUSSION 

The results of this study highlight both the strengths 

and limitations of fresh urine microscopy as a 

diagnostic tool for urinary tract infections. While urine 

culture remains the gold standard for UTI diagnosis, 

fresh urine microscopy offers several advantages, such 

as faster results and lower cost. The sensitivity and 

specificity of microscopy, as demonstrated in this 

study, indicate that it is a useful initial screening tool 

for UTIs, particularly in clinical settings where a rapid 

diagnosis is required. However, microscopy's 

sensitivity was lower compared to culture, which may 

result in false negatives, especially in cases where 

bacterial counts are low or when pathogens do not 

stain well. 

One of the key findings of this study was the 

discrepancy between fresh urine microscopy and urine 

culture results. Microscopy detected a higher 

proportion of UTIs, which could be due to the 

detection of bacteria or inflammatory cells that might 

not have reached the threshold required for positive 

culture results. Additionally, the presence of pyuria and 

bacteria in the microscopy analysis may also indicate 

other non-infectious urinary conditions, such as 

interstitial cystitis, which could contribute to the false-

positive results. 

The lower specificity of fresh urine microscopy 

observed in this study may be due to contamination, 

handling errors, or the presence of other inflammatory 

conditions that lead to pyuria without bacterial 

infection. On the other hand, urine culture's ability to 

identify the specific causative pathogen and assess 

antimicrobial resistance remains its key advantage, 

especially in complex or recurrent UTI cases. 

The high agreement between the two methods in 

identifying positive cases suggests that fresh urine 

microscopy can be used as a rapid screening method, 

but it should not replace urine culture, especially for 

treatment decisions, pathogen identification, or 

antibiotic susceptibility testing. 

 

CONCLUSION 

https://doi.org/10.37547/ajbspi/Volume03Issue03-01
https://scholar.google.co.in/scholar?q=
https://www.mendeley.com/search/?page=1&query=


Volume 04 Issue 12-2024 7 

                 

 
 

   
  
 

American Journal Of Biomedical Science & Pharmaceutical Innovation    
(ISSN – 2771-2753) 
VOLUME 04 ISSUE 12 PAGES: 1-7 

 

OCLC – 1121105677     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

Servi 

This study demonstrates that while urine culture 

remains the gold standard for diagnosing urinary tract 

infections, fresh urine microscopy provides a reliable 

and cost-effective alternative for rapid screening, 

especially in resource-limited settings. The findings 

suggest that fresh urine microscopy could be utilized 

as an initial diagnostic tool, with a follow-up urine 

culture recommended for confirmation and to 

determine the causative organism and resistance 

patterns. Future studies with larger sample sizes and 

more diverse patient populations are needed to 

further refine the role of fresh urine microscopy in UTI 

diagnosis and to explore its potential as a primary 

diagnostic tool in specific clinical scenarios. 

In summary, both methods offer complementary 

diagnostic benefits, and integrating fresh urine 

microscopy for initial screening, followed by urine 

culture for definitive diagnosis, could enhance the 

efficiency of UTI diagnosis and improve patient 

outcomes. 

REFERENCE 

1.Abhay Ram, Roman Dasgupta, Urinary Tract 

Infection, Clinical Perspective and Urinary Tract 

Infection, 2013 

2.Griebling,Urinary  Tract  Infection  in  Women,  

Urologic Diseases in America, NIH publication, 07-

5512:587-619 

3.Hoton  TM ,  Diagnosis,  Prevention  and  Treatment  

of Catheter  Associated  UTI  in  Adults,  Clinical  

Infectious Diseases, 2010 

4.Mackie and McCartney, Practical Medical 

Microbiology, Fourth Edition 

5.Mackie and McCartneyPractical Medical 

Microbiology, Fourth Edition 

6.Sharma JB et al,Prevalence of Urinary Incontinent  

and Other Urological Problems During Pregnancy, 

Archieves of Gynecology and Obstetricians, 2009 

7.Tolkoff-Rubin  NE,UTI,  Pyelonephritis  and  Reflex  of 

Nephropatyhy,The Kidney ,8thEdition Volume 2 

8.Shaeffer   AJ, Infections  of  Urinary  Tract,  Cambell’s 

Urology, 8thEdition, Volume 1 

9.Anderson  CG  et al  ,Intracellular  Bacterial  Biofilms  

like Pods in UTI, Science 2003 

10.Sue  Clement  et  alComparison  of  Urine  Chemistry 

Analysis, Microscopy, Culture and Sensitivity Results to 

detect  the  Presence  of  Urinary  Tract  Infection  in  an 

Elective    Orthopedic    population,    ,    Contemporary 

Nurses, July 2004, Volume 17 

11.Acta  Paediatrica,  Diagnostic  performances  of  

Urine Dipstick   testing   in   Children   with   suspected   

UTI:   a Systemic    Review    of    relationship    with    age    

and comparison with Microscopy, Volume 99, Issue 4 

https://doi.org/10.37547/ajbspi/Volume03Issue03-01
https://scholar.google.co.in/scholar?q=
https://www.mendeley.com/search/?page=1&query=

