Imagen de Portada
Código QR

Enhanced detection of Leptospira in cattle : Comparative performance of loop-mediated isothermal amplification, polymerase chain reaction and serological methods

Leptospirosis is a globally distributed zoonotic disease. This study aimed to evaluate the performance of loop-mediated isothermal amplification (LAMP) in detecting Leptospira DNA in bovine samples compared to conventional lipL32 PCR and serological methods. A total of 464 serum, 96 urine, and 31 or...

Descripción completa

Autores principales: Hamer, Micaela, Saraullo, Vanina Rosa, Esteban, Micaela, Sanchez, Maria Cristina, Brihuega, Bibiana Felicitas, Martinez, Mara Leila
Formato: Artículo
Lenguaje:Inglés
Publicado: Elsevier 2025
Materias:
PCR
Agglutination Tests
Leptospirosis
Cattle
Isothermal Processes
Immunological Techniques
Leptospira
Reacción de Aglutinación
Ganado Bovino
Proceso Isotérmico
Técnicas Inmunológicas
Acceso en línea:http://hdl.handle.net/20.500.12123/24460
https://www.sciencedirect.com/science/article/abs/pii/S0378113525002974
https://doi.org/10.1016/j.vetmic.2025.110662
Sumario:Leptospirosis is a globally distributed zoonotic disease. This study aimed to evaluate the performance of loop-mediated isothermal amplification (LAMP) in detecting Leptospira DNA in bovine samples compared to conventional lipL32 PCR and serological methods. A total of 464 serum, 96 urine, and 31 organ samples were analyzed using LAMP, lipL32 PCR, and the microscopic agglutination test (MAT). The results showed that 52.8 % of sera tested positive exclusively by MAT, indicating past exposure, while 1.2 % tested positive by molecular techniques, suggesting early infection. In urine samples, LAMP detected leptospiral DNA in 62.5 % of cases, highlighting its potential for identifying asymptomatic carriers. Among organ samples from aborted fetuses, 22.6 % were positive by both molecular techniques, supporting Leptospira as a potential cause of fetal loss. Notably, LAMP exhibited a high diagnostic sensitivity (100 %, 95 % CI: 93.5–100 %) and specificity (95.4 %, 95 % CI: 93.2–97.0 %), outperforming lipL32 PCR in DNA detection. Additionally, Cohen’s Kappa index (0.792) indicated substantial agreement between LAMP and lipL32 PCR. Given its higher sensitivity, rapid turnaround, and affordability, LAMP represents a valuable tool for improving leptospirosis diagnosis, particularly in resource-limited settings. These findings underscore the importance of integrating molecular and serological techniques for a more accurate detection of Leptospira infection in cattle.

Ejemplares similares