Bacteria in the urine what does it mean, causes and treatment

Normally, a healthy individual has no bacteria or infections in the kidneys and urinary system, and the urine ought to not consist of any microbes. The look of bacteria in the urine is called bacteriuria. This condition does not constantly have scientific symptoms, it is typically discovered just throughout lab research study.

What does the look of bacteria in urine mean?

Bacteriuria usually accompanies inflammatory illness of the kidneys and urinary system. It can be accompanied by scientific symptoms throughout the advancement of illness; in the early phases of infection, the procedure can be asymptomatic and without concomitant modifications in other lab criteria.

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How hazardous is bacteriuria

Bacteriuria is a condition that typically precedes the advancement of contagious and inflammatory illness of the genitourinary device, specifically in females.

This condition boosts the probability of the danger of illness by 8 times, in the future, cystitis and pyelonephritis in such clients take place 5-10 times more frequently. The existence of microorganisms in the urinary organs throughout pregnancy is specifically undesirable – the danger of pyelonephritis increases 20-25 times, the probability of early birth and fetal poor nutrition boosts.

Types of bacteria in urine

Most typically, opportunistic microbes are discovered in the urine, which can be causative representatives of contagious and inflammatory illness of the urinary system.

The most typical bacteria discovered in urine are:

  • E. coli.
  • However.
  • Citrobacteria.
  • Klebsiella.
  • Pseudomonas aeruginosa.
  • Enterococcus.

Escherichia coli (E. coli) is the reason for bacteriuria in about 90% of cases; comparable microorganisms from the Escherichia group are typically discovered. This kind of bacteria lives in the end areas of the gastrointestinal system, excreted in the feces. They can increase in the urine and in the wall of the urinary organs, triggering swelling, are delicate to lots of antimicrobial representatives.

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Pseudomonas aeruginosa is among the “problem” microorganisms that are resistant to lots of prescription antibiotics: penicillins, nitrofurans. Sensitive to ciprofloxacin.

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Less typically, staphylococci and streptococci are discovered in the urine – pathogens of purulent sores of the skin and soft tissues.

In contagious illness with urine, particular microbes can be launched – the causative representatives of leptospirosis, typhoid fever and paratyphoid fever.

Asymptomatic bacteriuria

The detection of bacteria in the urine in the lack of problems about the performance of the urinary organs is called asymptomatic bacteriuria, which is discovered primarily throughout regular screening evaluations.

Causes of look

Bacteria more frequently go into the urinary system rising from the outside. This is helped with by an offense of the outflow of urine, offense of the guidelines of individual health and endocrine illness (diabetes mellitus). In females, sex and pregnancy likewise matter.

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The frequency of detection of bacteria in urine increases substantially in the existence of foreign things in the urinary system: catheters, stents, stones.

Much less typically, hematogenous and lymphogenous spread of microorganisms is possible. In this case, they are brought into the kidneys with the circulation of contaminated blood or lymph from other foci of infection, and then go into the urine.


The state of asymptomatic bacteriuria is not accompanied by any scientific symptoms, for that reason it is called “asymptomatic”, that is, not accompanied by indications of illness.

This condition might be accompanied by a modification in other lab criteria – pyuria (the look of leukocytes) and epithelial cells.


In order to discover bacteria in urine, scientific and bacteriological research study techniques are utilized: microscopy of urinary sediment, shot on bacterial microbial plants. An antibiotic vulnerability test is carried out to figure out efficient infection control representatives.

To evaluate the causes of bacteriuria, it is necessary to consider other indications of basic scientific analysis discovered by microscopy. A concomitant, even minor, boost in the variety of leukocytes, epithelial cells and mucous is particular of contagious swelling. If all indications are regular, then bacteria normally appear due to inadequate health or offense of the guidelines for gathering product.

The essential part of the research study is to develop a connection in between the recognized bacteriuria and the function of opportunistic microorganisms in the development of a contagious and inflammatory procedure. For this, a thorough re-study is performed and all the information gotten are considered: the variety of colony-forming systems, the range and variety of the separated plants, the outcomes of the re-study.

Quantifying the degree of bacteriuria assists identify infection from contamination of product throughout collection or storage. At the exact same time, the level of sensitivity of various techniques is not the exact same: for bacteriological shot, it is 1000 live bacteria (or colony-forming systems) per milliliter (103/ml), if the material of microorganisms is less, then the culture will not grow on a nutrition medium.

With a bacterioscopic evaluation of the urine centrifugate, smaller sized quantities of microorganisms can be discovered, depending upon the thoroughness of the microscopy. In this case, non-viable bacteria can likewise be considered, however they cannot be counted.

A reading of 103 CFU/ml is thought about appropriate, normally suggesting contamination of the product; a single decision of 104 CFU/ml might likewise be because of technical mistakes. Twice detection of 104-105 CFU in a milliliter of urine currently suggests the existence of infection.

Detection of bacteriuria often needs extra research studies to leave out other pathology of the genitourinary sphere in aging: females require to figure out the recurring volume of the bladder, males – prostate-specific antigen.


In most cases, if bacteria exist in the urine, antibiotic treatment is required. The option of a treatment program is identified by the scientific symptoms of pathology.

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Therapy for inflammatory illness

With a recognized medical diagnosis of kidney or urinary system illness, complex treatment is carried out utilizing an antibiotic, which is recommended considering basic suggestions and information on the level of sensitivity of pathogens.

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Most typically, fluoroquinolone anti-bacterial drugs consisting of ciprofloxacin and levofloxacin are utilized. Penicillin prescription antibiotics, cephalosporins, fosfomycin, and nitrofurans can be utilized. The dose and period of treatment are identified by the type of the illness and the efficiency of treatment.

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Treatment of asymptomatic bacteriuria

This condition does not constantly need the consultation of anti-bacterial representatives. In some cases, just routine tracking of the indication and extra evaluation of the client are needed.

If it is required to utilize prescription antibiotics, it is required to consider the outcomes of a bacteriological research study, and often an antibiogram.

Antibiotic treatment is performed in the following scenarios:

  • Childhood.
  • Pregnancy.
  • Condition after surgical treatment on the urinary system.
  • Installation of a Folley catheter.

For kids, prescription antibiotics are recommended just based upon the outcomes of plants sowing for level of sensitivity and just when microbes are discovered in a quantity of more than 105/ml in 2 research studies in a row, performed with a period of 3-7 days. Empirical antibiotic prescribing is not practiced.

During pregnancy, if pathogens of the digestive tract group and hemophilic staphylococcus are discovered, Nitrofurantoin, Amoxicillin, Biseptol and cephalosporin drugs in oral kinds (Cefpodoxime, Cephalexin, Cefuroxime) can be utilized. The course of admission is from 3 days to 1 week. If another plants is recognized, the culture result for antibiotic level of sensitivity is considered.

After urological operations and catheterization of the urinary bladder, Biseptol is recommended for 3 days in a double dosage to eliminate the microflora of the digestive tract group. In other cases, it is preferable to consider the level of sensitivity information, normally the least expensive resistance of microbes to nitrofurans, fluoroquinolones and fosfomycin is discovered.

In other cases, in the lack of scientific symptoms, prescription antibiotics are not needed. It is possible to utilize phytopreparations: Kanefron, Uronephron, Cyston, preparation of lingonberry leaf, kidney tea.

Svetlana Borszavich

General practitioner, cardiologist, with active work in therapy, gastroenterology, cardiology, rheumatology, immunology with allergology.
Fluent in general clinical methods for the diagnosis and treatment of heart disease, as well as electrocardiography, echocardiography, monitoring of cholera on an ECG and daily monitoring of blood pressure.
The treatment complex developed by the author significantly helps with cerebrovascular injuries and metabolic disorders in the brain and vascular diseases: hypertension and complications caused by diabetes.
The author is a member of the European Society of Therapists, a regular participant in scientific conferences and congresses in the field of cardiology and general medicine. She has repeatedly participated in a research program at a private university in Japan in the field of reconstructive medicine.