Table 2.

Incidence of DF cases in Hermosillo and Nogales, per 100,000 person years

Year	Hermosillo	Nogales
2006	22.6	1.4
2007	15.4	0.5
2008	92.0	No cases reported
2009	22.2	1.9
2010	504.0	1.9
2011	26.3	1.0
2012	12.3	No cases reported
2013	33.1	1.8

Incidence is calculated based on reported DF cases (probable and confirmed cases are both included). Data were obtained from the Sonoran Health Department. Calculations were made using the 2010 census for total population in Hermosillo (715,061) and Nogales (212,533). During 2006–2013, all reported cases in Nogales were traced to travel to DF-endemic areas.