In the summer of 2007, an outbreak of Chikungunya virus (CHIKV) started in the urban areas of Castiglione di Cervia (Latitude 44 degrees 15 ' 35.70" N, Longitude 12 degrees 15 ' 47.08" E) and Castiglione di Ravenna (Latitude 44 degrees 15 ' 33.97" N, Longitude 12 degrees 15 ' 17.97" E), Italy, with secondary foci in other Emilia-Romagna urban areas. At the end of the outbreak a total of 217 confirmed cases were reported (45.6% males, 54.4% females). Aedes albopictus was identified as the mosquito vector species responsible of the outbreak. To estimate the dispersion of infected female mosquitoes, a spatio-temporal analysis on geocoded human case residences was performed using a Geographic Information System (QGIS 3.10). The mean distance between the primary and secondary cases after 7-14 days from the start of the outbreak ranged from 71.58 m (+/- 32.26 SD) to 83.07 m (+/- 32.26 SD) while the maximum distance ranged from 130.50 m to 174.93 m. The results obtained from this analysis can be useful to better understand the dynamics of the outbreak and to provide evidence-based data for planning emergence vector control activities focused on imported cases, to avoid the spread of the virus.
