%0 Journal Article %A Jose Luis Bellod Cineros %A Ole Lund %T KmerFinderJS: A client-server method for fast species typing of bacteria over slow Internet connections %D 2017 %R 10.1101/145284 %J bioRxiv %P 145284 %X Motivation KmerFinder is a program based on K-mer statistics for identifying bacterial species in whole genome data, that as a web server that have been used more than 10.000 times. Kmer-FinderJS is a development of the KmerFinder that benefits from the downsampling of data using a prefix filtering used by KmerFinder, to minimize amount of data that needs to be transferred between the client and the server.Results KmerFinderJS replaces the python based hash structure for holding the databases with a true Key-value database. These improvements are shown to lead to a many-fold speed up of species identification with the internet transfer speeds that are realistic to expect today. It is also shown that the method can find the true content of an artificial metagenomic cocktail with no false positives.Availability The method is freely available at https://cge.cbs.dtu.dk/services/KmerFinderJS/ and as a source code at https://bitbucket.org/genomicepidemiology/kmerfinderjsContact cisneros{at}cbs.dtu.dkSupplementary information Supplementary data are available at biorxiv online. %U https://www.biorxiv.org/content/biorxiv/early/2017/06/02/145284.full.pdf