Infrequent complications associated with ovarian cysts include: Ovarian torsion. Cysts that enlarge can cause the ovary to move, increasing the chance of painful twisting of your ovary (ovarian torsion). Symptoms can include an abrupt onset of severe pelvic pain, nausea and vomiting. Ovarian torsion can also decrease or stop blood flow to the ovaries.
Urease is a hydrolytic enzyme that attacks the nitrogen and carbon bond in amide compounds such as urea and forms the alkaline end product ammonia. The presence of urease is detectable when the organisms are grown in a urea broth medium containing the pH indicator phenol red. As the substrate urea is split into its products, the presence of ammonia creates an alkaline environment that causes the phenol red to turn to deep pink.
The UA dipstick is very helpful. Leukocyte esterase has a sensitivity of 75% and. specificity of 98% for the detection of a UTI. [25] A positive nitrite test has a specificity. of 90% but a sensitivity as low as 30% for a UTI. [25] Combination of the 2 tests leads to. a more accurate detection of a UTI with sensitivity of up to 88%.