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The plaque reduction neutralization test is used to quantify the titer of neutralizing antibody for a virus. [1] [2] The serum sample or solution of antibody to be tested is diluted and mixed with a viral suspension. This is incubated to allow the antibody to react with the virus. This is poured over a confluent monolayer of host cells.
However, serum therapy is today still used as the first line of defence during an outbreak as it can relatively quickly obtained. [19] [20] Serum therapy was shown to reduce mortality in patients during the 2009 swine flu pandemic [21] and the Western African Ebola virus epidemic. [22] It is also being tested as possible treatment for COVID-19.
Concentration and sterility of the serum were checked carefully, and the serum was filtered many times. Protein content was decreased in order to use the serum for humans. After the blood sampling, the horses could rest for three to four weeks and received extra food to recover the blood loss.
This technique makes many copies of the virus genome using virus-specific probes. Variations of PCR such as nested reverse transcriptase PCR and real time PCR can also be used to determine viral loads in patient serum. This is often used to monitor treatment success in HIV cases.
Virus quantification is counting or calculating the number of virus particles (virions) in a sample to determine the virus concentration. It is used in both research and development (R&D) in academic and commercial laboratories as well as in production situations where the quantity of virus at various steps is an important variable that must be monitored.
Also sometimes called the Norwalk virus or winter vomiting bug, norovirus is an extremely contagious virus. It is a common cause of illness outbreaks on cruise ships, where more than 90% of ...
Several recalls were issued in 2024 for Ford Motor Company vehicles.. The recall report data is from Jan. 1, 2024, to Dec. 27, 2024. The U.S. Department of Transportation (DOT) compiles data from ...
A general procedure for HA is as follows, a serial dilution of virus is prepared across the rows in a U or V- bottom shaped 96-well microtiter plate. [5] The most concentrated sample in the first well is often diluted to be 1/5x of the stock, and subsequent wells are typically two-fold dilutions (1/10, 1/20, 1/40, etc.).
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