The gene of RNA viruses, encoding RNA-directed RNA polymerase (RdRp) is relatively conserved due to its crucial function in viral genome replication and transcription making it a useful target for genetic diversity study and PCR detection. In this study, we investigated the genetic diversity of 21 tilapia lake virus (TiLV) genome segment 1 sequences predictively coding for RdRp subunit P1. Those sequences were obtained from infected fish samples collected in Ecuador, Israel, Peru, and Thailand between 2011 and 2019 (nine sequences from this study and 12 sequences from GenBank).
A presentation given at The World Organisation for Animal Health (OIE) held the 4th Global Conference on Aquatic Animal Health from 2 to 4 April 2019, in Santiago, Chile. Tilapia is very important for food and nutrition security, livelihoods and income for rural households in Asia and Africa. Importance attached to biosecurity and health management must be at the same level as for shrimps and salmon. This calls for a massive change in the way farmers, researchers and policy makers treat carps and tilapia with respect to overall biosecurity and health management.