Control for virus detection assays based on...

C - Chemistry – Metallurgy – 12 – Q

Patent

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C12Q 1/68 (2006.01)

Patent

CA 2689108

The invention provides a method for the accurate quantification of a virus in a sample, by reverse transcription polymerase chain reaction (RT-PCR), which comprises: adding a known concentration of a Mengo virus to the sample as control for the nucleic acids extraction step, said Mengo virus being a mutant strain with the same growth properties than those of the wild-type Mengo virus, and with non-pathogenic capacity; performing a nucleic acids extraction to obtain a nucleic acids suspension; analyzing the nucleic acids suspension by RT-PCR with primers and probes; quantifying the amplimers resulting from the RT-PCR; determining the concentration of the virus in the sample by comparison of the value obtained with an appropriate standard curve; and determining the concentration of the Mengo virus by comparison of the value obtained with an appropriate standard curve.

La présente invention concerne une méthode de quantification exacte d'un virus dans un échantillon, par une technique de transcription inverse-amplification en chaîne par polymérase (RT-PCR) qui consiste à ajouter une concentration connue d'un virus Mengo à l'échantillon en tant que témoin pour l'étape d'extraction d 'acides nucléiques, ledit virus Mengo étant une souche mutante ayant les mêmes propriétés de croissance que le virus Mengo de type sauvage et un pouvoir non pathogène; à effectuer une extraction d'acides nucléiques pour obtenir une suspension d'acides nucléiques; à analyser la suspension d'acides nucléiques par RT-PCR avec des amorces et des sondes; à quantifier les amplimères résultant de la RT-PCR; à déterminer la concentration du virus dans l'échantillon en comparant la valeur obtenue à une courbe standard appropriée; et à déterminer la concentration du virus Mengo en comparant la valeur obtenue à une courbe standard appropriée.

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