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A positive test for nitrites in the urine is called nitrituria. This test is commonly used in diagnosing urinary tract infections (UTIs). A positive nitrite test indicates that the cause of the UTI is a Gram-negative organism, most commonly Escherichia coli. The reason for nitrites' existence in the presence of a UTI is due to a bacterial ...
Symptomatic: up to 10% of women a year [6][7] Bacteriuria is the presence of bacteria in urine. [1] Bacteriuria accompanied by symptoms is a urinary tract infection while that without is known as asymptomatic bacteriuria. [1][2] Diagnosis is by urinalysis or urine culture. [3] Escherichia coli is the most common bacterium found. [1]
A urinary tract infection (UTI) is an infection that affects a part of the urinary tract. [1] Lower urinary tract infections may involve the bladder (cystitis) or urethra (urethritis) while upper urinary tract infections affect the kidney (pyelonephritis). [10] Symptoms from a lower urinary tract infection include suprapubic pain, painful ...
Pyelonephritis is inflammation of the kidney, typically due to a bacterial infection. [ 3 ] Symptoms most often include fever and flank tenderness. [ 2 ] Other symptoms may include nausea, burning with urination, and frequent urination. [ 2 ] Complications may include pus around the kidney, sepsis, or kidney failure.
A urine test strip or dipstick is a basic diagnostic tool used to determine pathological changes in a patient's urine in standard urinalysis. [1] A standard urine test strip may comprise up to 10 different chemical pads or reagents which react (change color) when immersed in, and then removed from, a urine sample.
Staphylococcus saprophyticus is identified as belonging to the genus Staphylococcus using the Gram stain and catalase test. It is identitified as a species of coagulase-negative staphylococci (CoNS) using the coagulase test. Lastly, S. saprophyticus is differentiated from S. epidermidis, another species of pathogenic CoNS, by testing for ...
nitrite reductase. Nitrite reductase refers to any of several classes of enzymes that catalyze the reduction of nitrite. There are two classes of NIR's. A multi haem enzyme reduces NO 2− to a variety of products. Copper containing enzymes carry out a single electron transfer to produce nitric oxide.
The presence of nitrites, which causes a pink color on the reagent strip pad, therefore acts as an indicator of urinary tract infection. [51] The nitrite test is quite specific, meaning that someone is likely to have a UTI if it is positive, but it is not sensitive; a negative result does not reliably indicate that the subject does not have a UTI.