An analytical kit for searching for and identifying Human Papilloma Virus (HPV) in a sample, comprises: specific primers for ampliflying genic sequences comprisedin L1 region and E6/E7 regions of HPV; at least one chip comprising oligonucleotidic probes specific for said genic sequences, said probes being arranged for being hybridized with said genic sequences after said amplification; colorimetric means arranged for detecting said hybridization; an analytical kit for searching for and identifying an enteric virus in a sample, said enteric virus being selected from a group comprising: Enterovirus, EV71, Coxsachievirus A16, HAV, HEV, Norwalk Virus, Rotavirus, Adenovirus, comprises: specific primers for ampliflying specific genic sequences of said enteric virus; at least one chip comprising oligonucleotidic probes specific for said genic sequences, said probes being arranged to be hybridized with said genic sequences after said amplification; colorimetric means arranged for detecting said hybridization; an analytical kit for searching for and identifying a bacterium in a sample, said bacterium being selected from a group comprising: Chlamydia pneumoniae, Legionella pneumophila, Mycoplasma pneumoniae, comprises: specific primers for ampliflying specific genic sequences of said bacterium; at least one chip comprising oligonucleotidic probes specific for said genic sequences, said probes being arranged to be hybridized with said genic sequences after said amplification; colorimetric means arranged for detecting said hybridization.