ISSN 2756-3413
African Journal of Virology Research ISSN 2756-3413 Vol. 18 (3), pp. 001-004, March, 2024. Available online at www.internationalscholarsjournals.org © International Scholars Journals
Full Length Research Paper
Synergistic LAMP assays for identifying hoof swabs in dairy cattle affected by footrot
Sun D. B., Wu R., Guo D. H.*, He X. J., Zheng J. S., Wang J. F., Lin Y. C., Han X., Wang Y. Q. and Guo T. T.
College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing High-tech Industrial Development Zone, Daqing 163319, P. R. China.
Accepted 1 November, 2023
Abstract
To investigate the presence of Fusobacterium necrophorum (F. necrophorum) and Dichelobacter nodosus (D. nodosus) in dairy cattle footrot, a loop -mediated isothermal amplification method for detection of D. nodosus (Dn-LAMP) was developed and evaluated using species-specific16S rRNA gene as target gene. The Dn-LAMP showed no cross reaction with several common pathogens from cattle, and detection limit of the Dn-LAMP was 10 cfu/mL of D. nodosus. Amplicons of the Dn-LAMP could be detected by visual inspection. 189 hoof swabs from footrot-infected dairy cows in Heilongjiang province of China were detected using Dn -LAMP and Fn-LAMP for diagnosis of F. necrophorum, respectively. In 189 hoof swabs, 9 were positive for D. nodosus, and 95 were positive for F. necrophorum. These data suggested that combination of Dn -LAMP with Fn-LAMP will have a potential use for etiology investigation of footrot in dairy cattle.
Key words: Dichelobacter nodosus, Fusobacterium necrophorum, LAMP.