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Influenza A virus subtype H1N1 (A/H1N1) is a subtype of influenza A virus (IAV). Some human-adapted strains of H1N1 are endemic in humans and are one cause of seasonal influenza (flu). [ 1 ] Other strains of H1N1 are endemic in pigs ( swine influenza ) and in birds ( avian influenza ). [ 2 ]
Hemagglutinin is a class I fusion protein, [1] [2] having multifunctional activity as both an attachment factor and membrane fusion protein. Therefore, HA is responsible for binding influenza viruses to sialic acid on the surface of target cells, such as cells in the upper respiratory tract or erythrocytes , [ 3 ] resulting in the ...
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.).
[1] [2] For clinicians, RIDTs serve as a first-line test that can be confirmed (especially if negative) by traditional diagnostic tests. RIDTs also allow clinicians to promptly start antiviral treatment in high-risk populations, to formulate effective infection control measures, and to make informed decisions regarding diagnostic investigations.
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.
Test Strips: The system consists of a plastic strip containing 20 small reaction tubes (microtubes), each containing different dehydrated substrates. Rehydration and Inoculation: To perform the test, the microtubes are rehydrated with a bacterial suspension. Each microtube is designed to detect specific enzymatic activities or carbohydrate ...
A test strip is a band/piece/strip of paper or other material used for biological testing. Specifically, test strip may refer to: Food testing strips; Glucose meter test strip; Lipolysis test strip; Urine test strip; Universal indicator pH test strips; It may also refer to: Teststrip, an art gallery in Auckland, New Zealand
Immunoaffinity chromatography is also the basis for immunochromatographic test (ICT) strips, which provide a rapid means of diagnosis in patient care. Using ICT, a technician can make a determination at a patient's bedside, without the need for a laboratory. [18] ICT detection is highly specific to the microbe causing an infection. [19]