RT Journal Article T1 Point-of-Care Diagnostic Test for Rapid Detection of Infectious Laryngotracheitis Virus by Loop-Mediated Isothermal Amplification and Nanoprobes A1 Cea Callejo, Pablo A1 Trenado, Claudia A1 El Mansouri, Elías A1 Gómez-Lucía Duato, María Esperanza A1 Domenech Gómez, Ana María A1 Biarnés, Mar A1 Cuenca, J. Marco A1 Sánchez Llatas, Christian J. A1 Madrid González, Ricardo A1 Benítez Rico, Laura AB Infectious laryngotracheitis virus (ILTV), a DNA virus classified as Gallid alphaherpesvirus 1, causes a highly contagious respiratory disease in chickens, leading to significant economic losses and health risks for the poultry industry. The rapid detection of ILTV is essential to control its spread and prevent outbreaks. Traditional diagnostic methods like PCR are costly, require specialized personnel, and delay response efforts. To address this, we developed a point-of-care diagnostic test combining loop-mediated isothermal amplification (LAMP) with DNA nanoprobes on respiratory swabs. LAMP targets the ILTV-glycoprotein E (gE) gene, enabling rapid nucleic acid amplification at 65 °C without extraction, making it suitable for on-site detection. DNA nanoprobes provide a colorimetric readout visible to the naked eye. Gold nanoparticles drive this readout, as their red color, based on localized surface plasmon resonance, persists in the presence of ILTV DNA through DNA-DNA hybridization, ensuring reliable detection. The assay achieved 100% sensitivity and specificity for ILTV-gE, with a detection limit of 200 copies per reaction, allowing for the early identification of infections. The results are available within 45 min, enabling prompt measures to control ILTV spread. Cost-effective and user-friendly, this method enhances disease management and biosecurity in poultry farms. PB MDPI SN 1661-6596 YR 2025 FD 2025-02-25 LK https://hdl.handle.net/20.500.14352/119121 UL https://hdl.handle.net/20.500.14352/119121 LA eng NO Cea-Callejo, P.,Trenado, C., El Mansouri, E., Gomez-Lucia, E., Doménech, A., Biarnés, M., Cuenca, J.M., Sánchez-Llatas, C.J., Madrid, R., Benítez,(2025) L. Point-of-Care Diagnostic Test for Rapid Detection of Infectious Laryngotracheitis Virus by Loop-Mediated Isothermal Amplification and Nanoprobes. Int. J. Mol. Sci., 26, 1971. https://doi.org/10.3390/ijms26051971 NO Author Contributions:Conceptualization, P.C.-C., R.M. and L.B.; formal analysis, P.C.-C., C.T. and R.M.; investigation, P.C.-C., C.T., E.E.M., M.B., J.M.C. and C.J.S.-L.; methodology P.C.-C., R.M. and L.B.; writing—original draft, P.C.-C., A.D., R.M. and L.B.; writing—review and editing, P.C.-C., C.T., E.G.-L., A.D., R.M. and L.B.; resources, E.G.-L., A.D., M.B. and J.M.C.; funding and acquisition, A.D. and L.B.; supervision, A.D., R.M. and L.B.; project administration, R.M. and L.B. All authors have read and agreed to the published version of the manuscript. NO Ministerio de Ciencia, Innovación y Universidades (España) NO Comunidad de Madrid DS Docta Complutense RD 5 abr 2025