Abstract: A portable diagnostic device for performing the diagnosis of pathogens, such as viruses, bacteria, microorganisms, etc., by rapidly detecting their nucleic acids in a biological sample to be tested. Also, the use of the portable diagnostic device and the methods for detection of at least one nucleic acid sequence of interest implemented with the aid of the portable diagnostic device.

Abstract: Method for the diagnosis or the screening of an arbovirus infection and preferably a flaviviridae infection and more preferably a flavivirus infection, reagents useful in said method and their applications. Said method comprises: (i) contacting a sample from the subject or animal with a solid support sensitized with an Ig binding protein which is directed against a specific class of Ig molecules of the subject or animal species under consideration and (ii) incubating the immunocomplex formed in (i) with a detector molecule consisting of a hybrid protein comprising at least an arboviral ED3 domain and an alkaline phosphatase (PhoA), the detection of said immunocomplex being the sign of the presence of an arbovirus in said sample.

Abstract: The present invention relates to reagentless fluorescent biosensors which comprise at least one ankyrin repeat and a fluorophore and are specific for at least one target; the method for preparing such reagentless fluorescent biosensors comprises the following steps: (a) identifying the residues (R1) of the paratope of the biosensor by mutagenesis of all, or of a subset, of the residues of the biosensor, and determining variations in at least one measurable chemical or physical parameter of interaction with said at least one target; wherein said variations are due to each mutation or to groups of mutations; (b) selecting the cysteine residues, or the residues to be mutated to cysteine, from the residues (R2) of the biosensor which are located adjacent to the residues of the paratope; (c) mutating by site-directed mutagenesis at least one of the residues (R2) selected in (b) to a cysteine residue when said residue is not naturally a cysteine residue; and (d) coupling the S? atom of at least one cystein residue

Abstract: Method for the diagnosis or the screening of an arbovirus infection and preferably a flaviviridae infection and more preferably a flavivirus infection, reagents useful in said method and their applications. Said method comprises: (i) contacting a sample from the subject or animal with a solid support sensitized with an Ig binding protein which is directed against a specific class of Ig molecules of the subject or animal species under consideration and (ii) incubating the immunocomplex formed in (i) with a detector molecule consisting of a hybrid protein comprising at least an arboviral ED3 domain and an alkaline phosphatase (PhoA), the detection of said immunocomplex being the sign of the presence of an arbovirus in said sample.