Ports along the Gulf Coast of the US with the highest relative likelihood of arrival (φj) by Ae. aegypti and Ae. albopictus via the international maritime trade network given a constant transmission potential (λ) of 0.5.

The total number of arrivals of fully cellular container ships at each port was strongly correlated with relative likelihood of arrival by both Ae. aegypti (r2 = 0.999, P > 0.0001) and Ae. albopictus (r2 = 0.999, P > 0.0001) during this time frame. This was reflective of the high connectivity between ports, which implies high risk for movement of Aedes spp. mosquitoes between these cities. While Houston seems to play a role as a hub for international arrivals, New Orleans and Mobile receive a great number of shipments from domestic ports, including Houston. Count data represents arrivals by fully cellular container ships from January 1st to December 31st, 2012.