Distribution of inspected and <i>A. aegypti</i>-infested container categories in Santa Cruz city.

<p>A) Proportions of container categories inspected (potential breeding sites with water) and infested with <i>A. aegypti</i> larvae and/or pupae during the six epidemics together. B) Probability of sampling an <i>A. aegypti</i>-infested container of each category within each of the four concentric areas Ca1–Ca4; this probability (Pp) is the probability of sampling a category of container × the probability of the container category being positive, expressed as a percentage.</p

Monthly number of dengue cases and confirmation rates in Santa Cruz city.

<p>Dengue cases and confirmation rates were calculated monthly for the entire city and within each concentric area (Ca1–Ca4) for the six epidemics together (E02–E07). The confirmation rate was expressed as a percentage: dengue cases (IgM positive) / suspected cases. Patients missing data on the onset of the symptoms (36) or location (240) were deleted from the analysis.</p

Distribution of dengue cases in Santa Cruz city.

<p>Left: overall dengue cases 2002–2008 (six epidemic cycles); right: annual dengue cases (October–September) from E02 to E07. The five quantile classes are similar for all maps and have been defined from overall data. Ua01–Ua36 = urban areas; C1–C4 = concentric areas.</p

Distribution of dwellings positive for <i>A. aegypti</i> larval and pupae stages in Santa Cruz city.

<p>Percentage of dwelling infestation by <i>A. aegypti</i> larvae and/or pupae per Ua (34 Uas have data). Left: for the 6 epidemics. Right: for each epidemic (October–September). The five quantile classes are similar for all maps and have been defined from overall data (<i>N</i> = 189).</p

Distribution of suspected and dengue cases and dengue incidence among gender and age classes in Santa Cruz city from 2002 to 2008.

<p>^aFrom 2001 INE census (<i>N</i> = 1,162,949 in 2001) adjusted by annual growth rates of 4.33%, 4.22%, 4.09%, 3.97%, 3.88% and 3.78%, respectively, from E02 (2003 population data) to E07 (2008 data).</p><p>^bThere were six missing data for gender and 314 for age.</p><p>Distribution of suspected and dengue cases and dengue incidence among gender and age classes in Santa Cruz city from 2002 to 2008.</p

Clinical symptoms reported for dengue cases and unconfirmed cases in Santa Cruz city from 2002 to 2008.

<p>Clinical symptoms reported for dengue cases and unconfirmed cases in Santa Cruz city from 2002 to 2008.</p

Distribution of confirmation rates of dengue cases in Santa Cruz city.

<p>The intensity of the green color of each urban unit (Ua) increases according to a scale of the confirmation rate of dengue cases expressed in percent: left: combined data from the first three epidemics E02–E04 (2002–2005), right: combined data from the last three epidemics E05–E07 (2005–2008). The cumulative number of suspected cases are noted in each urban area for the six epidemics together (E02–E07) in the left picture. The differences of the confirmation rates between the three first epidemics and the last three per Ua, expressed as a percentage, are presented in the right picture.</p

Temporal and spatial variations in dengue confirmation rates during the six epidemics 2002–2008 in Santa Cruz city.

<p>^aThere were 161 undated data</p><p>^bThere were 705 unlocalized data.</p><p>Temporal and spatial variations in dengue confirmation rates during the six epidemics 2002–2008 in Santa Cruz city.</p

Distribution of dengue cases during the low-transmission periods in Santa Cruz city.

<p>The data reported during early (October–December) plus late (July–September) low-transmission periods are presented for the 35 inhabited Uas and for the six epidemics together (E02–E07). The circles are proportional to the number of dengue cases. The Uas are colored according to the number of years with at least one dengue case (varied from 0 to 5).</p

Dwelling and container infestations with <i>Aedes aegypti</i> in Santa Cruz city.

<p>The dwelling infestation rate was significantly higher during the 7 months of the rainy season (October–April: 8.9%) than during the beginning of the dry season (May–June: 7.5%, χ² = 20.5, d.f. = 1, <i>P</i> < 0.01). The container infestation rate did not differ between these periods (3.0% vs. 3.2%, χ² = 3.3, d.f. = 1, <i>P</i> = 0.07). No data were available for the last months of the dry season (July–September).</p><p>Dwelling and container infestations with <i>Aedes aegypti</i> in Santa Cruz city.</p