diff --git a/etc/reapply_species_strain_map.pl b/etc/reapply_species_strain_map.pl
new file mode 100755
index 000000000..96beb6113
--- /dev/null
+++ b/etc/reapply_species_strain_map.pl
@@ -0,0 +1,144 @@
+#!/usr/bin/perl -w
+
+# Lookup the taxon ID associated with each gene in all CursDBs using
+# Config::get_species_taxon_of_strain_taxon()
+# If the lookup returns a result, change the Organism of the genes
+# to the result of the call
+# Then also update the organism of the corresponding genes in the TrackDB
+
+###########################
+# START OF BOILERPLATE CODE
+
+use strict;
+use warnings;
+use Carp;
+use feature ':5.10';
+
+use File::Basename;
+
+BEGIN {
+  my $script_name = basename $0;
+
+  if (-f $script_name && -d "../etc") {
+    # we're in the scripts directory - go up
+    chdir "..";
+  }
+};
+
+use lib qw(lib);
+
+use Canto::Config;
+use Canto::TrackDB;
+use Canto::Track;
+use Canto::Track::LoadUtil;
+use Canto::Meta::Util;
+
+my $app_name = Canto::Config::get_application_name();
+
+$ENV{CANTO_CONFIG_LOCAL_SUFFIX} ||= 'deploy';
+
+my $suffix = $ENV{CANTO_CONFIG_LOCAL_SUFFIX};
+
+if (!Canto::Meta::Util::app_initialised($app_name, $suffix)) {
+  die "The application is not yet initialised, try running the canto_start " .
+    "script\n";
+}
+
+my $config = Canto::Config::get_config();
+my $schema = Canto::TrackDB->new(config => $config);
+
+my $track_schema = Canto::TrackDB->new(config => $config);
+
+# END OF BOILERPLATE CODE
+#########################
+
+
+# A collection of IDs of genes that need to have their organisms
+# updated in the TrackDB.  We populate this map while iterating over
+# the CursDBs
+my %genes_to_update = ();
+
+
+my $proc = sub {
+  my $curs = shift;
+  my $curs_schema = shift;
+  my $track_schema = shift;
+
+  my $organism_rs = $curs_schema->resultset('Organism');
+
+  # orig taxon ID to new taxon ID map
+  my %taxon_map = ();
+
+  # first find all Organisms in this session that need updating,
+  # capturing them into %taxon_map
+  while (defined (my $organism = $organism_rs->next())) {
+    my $orig_taxonid = $organism->taxonid();
+    my $lookup_taxonid =
+      $config->get_species_taxon_of_strain_taxon($orig_taxonid);
+
+    if (defined $lookup_taxonid && $orig_taxonid != $lookup_taxonid) {
+      my $new_org = $curs_schema->resultset('Organism')
+        ->find_or_create({ taxonid => $lookup_taxonid });
+      $taxon_map{$orig_taxonid} = $new_org;
+    }
+  }
+
+  my $gene_rs = $curs_schema->resultset('Gene')
+    ->search({}, { prefetch => 'organism' });
+
+  # Iterate over genes and update the Organism based on %taxon_map
+  while (defined (my $gene = $gene_rs->next())) {
+    my $gene_taxonid = $gene->organism()->taxonid();
+
+    my $new_org = $taxon_map{$gene_taxonid};
+
+    if (defined $new_org) {
+      $genes_to_update{$gene->primary_identifier()} = 1;
+
+      print "updating ", $gene->primary_identifier(), " in CursDB\n";
+      print "  $gene_taxonid -> ", $new_org->taxonid(), "\n";
+      $gene->organism($new_org);
+      $gene->update();
+    }
+  }
+};
+
+my $load_util = Canto::Track::LoadUtil->new(schema => $schema);
+
+
+my $txn_proc = sub {
+  # iterate over CursDBs
+  Canto::Track::curs_map($config, $track_schema, $proc);
+
+  # update organisms of genes in the TrackDB
+  for my $gene_primary_identifier (keys %genes_to_update) {
+    my $gene = $track_schema->resultset('Gene')
+      ->find({ primary_identifier => $gene_primary_identifier },
+             { prefetch => 'organism' });
+    if (defined $gene) {
+      my $props_rs = $gene->organism()->organismprops()->search({}, { prefetch => 'type' });
+      my $orig_taxonid;
+      while (defined (my $prop = $props_rs->next())) {
+        if ($prop->type()->name() eq 'taxon_id') {
+          $orig_taxonid = $prop->value();
+          last;
+        }
+      }
+      if (!defined $orig_taxonid) {
+        die "internal error: can't find taxon ID for $gene_primary_identifier\n";
+      }
+      my $new_taxonid =
+        $config->get_species_taxon_of_strain_taxon($orig_taxonid);
+      my $new_organism =
+        $load_util->find_organism_by_taxonid($new_taxonid);
+
+      print "updating ", $gene->primary_identifier(), " in TrackDB\n";
+      $gene->organism($new_organism);
+      $gene->update();
+    }
+  }
+};
+
+$track_schema->txn_do($txn_proc);
+
+exit 0;