How do you tell if a urinalysis is contaminated?
A contaminated urine specimen can give a large amount of false data on a dipstick test. Greater than five epithelial cells on microscopic evaluation is likely a sign of contamination.
What are contaminants in urine culture?
Contamination is likely if only small numbers of bacteria or several bacterial species grow in urinary cultures. Lactobacilli, Corynebacteria species, Gardnerella, alpha-haemolytic streptococci, and aerobes are considered urethral and vaginal contaminants.
What does a dirty urine sample mean?
This usually indicates an infection that needs an antibiotic for treatment. No growth, or a negative result, indicates there is no infection present. If the test results show the growth of several different types of bacteria, it likely means that the urine sample was contaminated during the collection process.
Can Yourinalysis wrong?
A strong odor may be the result of a concentrated specimen rather than a urinary tract infection. Dipstick urinalysis is convenient, but false-positive and false-negative results can occur.
What is the cause of dirty urine?
Abnormal urine color may be caused by infection, disease, medicines, or food you eat. Cloudy or milky urine is a sign of a urinary tract infection, which may also cause a bad smell. Milky urine may also be caused by bacteria, crystals, fat, white or red blood cells, or mucus in the urine.
What happens if urine is contaminated?
A contaminated sample may lead to a false-positive urine culture result. In a non-contaminated urine specimen, only a single bacterial growth is identified as the source of the infection. Mixed bacterial flora with two or more microorganisms makes interpretation of the urine culture more difficult and prone to error.
What does urine contaminated with mixed flora mean?
Because “mixed flora”* implies that at least 2 organisms are present in addition to the identified organism, the urine culture does not meet the criteria for a positive urine culture with 2 organisms or less. Such a urine culture cannot be used to meet the NHSN UTI criteria.
Does contaminated urine mean infection?
Why is my urine brown and smelly?
Share on Pinterest Brown urine is a symptom of dehydration. Dehydration occurs when the body lacks enough water to function properly. A person can become dehydrated for many reasons, including excessive sweating, urinating, and not drinking enough fluids. Darker or brown urine is a symptom of dehydration.