SciELO - Scientific Electronic Library Online

vol.39 issue2First molecular characterization of Leishmania infantum species in patients infected with visceral leishmaniasis in Misiones province, Argentina author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google



Print version ISSN 0120-4157


BETTIN-MARTINEZ, Alfonso et al. Evaluation of a loop-mediated isothermal amplification method for the rapid detection of human respiratory syncytial virus in children with acute respiratory infection. Biomédica [online]. 2019, vol.39, n.2, pp.415-426. ISSN 0120-4157.


Human respiratory syncytial virus (hRSV) is the most frequent cause of acute respiratory infection of the lower respiratory tract in children under the age of five. The development of molecular techniques able to identify hRSV is one of the current challenges in the field of clinical research.


To evaluate the ability of an isothermal amplification method to rapidly detect hRSV in children with acute respiratory infection.

Materials and methods:

We collected 304 nasopharyngeal swab samples from children with symptoms of acute respiratory infection who attended the emergency unit at Hospital de la Universidad del Norte in Barranquilla from April, 2016, to July, 2017. After extracting viral RNA from the samples, we evaluated the ability of the reverse transcriptase-loop-mediated isothermal amplification (RT-LAMP) M assay to rapidly detect hRSVA and hRSVB compared to other molecular techniques: quantitative PCR (qPCR), reverse transcriptase-LAMP L assay, and as a standard, the multiplex nested reverse transcriptase polymerase chain reaction (nested RT-PCR).


The RT-LAMP M assay had a sensitivity of 93.59% and a specificity of 92.92%, and a concordance of 0.83 ± 0.036 as compared with the nested RT-PCR test. While the Kappa index of the RT-LAMP M assay was higher than the values for the RT-LAMP L assay and the qPCR, the values of the latter two methods were in agreement (0.75 ± 0.043 and 0.71 ± 0.045, respectively).


Due to the shorter running times, lower costs and better performance of the RT-LAMP M assay, it can be considered as a useful clinical tool for the detection of RSVA.

Keywords : Respiratory tract infections; respiratory syncytial viruses; child.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )