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The difference between the two approaches lies in the number of tubes used when performing the procedure. The two-step reaction requires that the reverse transcriptase reaction and PCR amplification be performed in separate tubes. The disadvantage of the two-step approach is susceptibility to contamination due to more frequent sample handling. [19]
Renal replacement therapy (RRT) is therapy that replaces the normal blood-filtering function of the kidneys. It is used when the kidneys are not working well, which is called kidney failure and includes acute kidney injury and chronic kidney disease .
Reptilase time (RT) is a blood test used to detect deficiency or abnormalities in fibrinogen, [1] [2] especially in cases of heparin contamination. Reptilase , an enzyme found in the venom of Bothrops snakes , has activity similar to thrombin .
The volume of the blood sample collection is very important in experimental animals. All nonterminal blood collection without replacement of fluids is limited up to 10% of total circulating blood volume in healthy, normal, adult animals on a single occasion and collection may be repeated after three to four weeks.
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Commonly tested tissues are brain homogenates and lymph tissues; however, prions have also been detected in skin and blood samples. [11] [12] [13] Certain tissues can be difficult to test for prions. For example, blood samples tend to have low levels of circulating intracellular prions and have inhibitors of the assay. [14]
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RT-LAMP does not require thermal cycles (unlike PCR) and is performed at a constant temperature between 60 and 65 °C. RT-LAMP is used in the detection of RNA viruses (groups II, IV, and V on the Baltimore Virus Classification system), such as the SARS-CoV-2 virus [ 4 ] and the Ebola virus .