Table 3. Infestation indices, Fortaleza, 2011–2015.
| Parameter | Mean | SD | Range | |||||
| a. Sample-based Entomological Surveys (January cycle) | ||||||||
| LIA (%) | 2011 | 1.80 | 1.04 | (0–5.29) | ||||
| LIRAa (%) | 2012 | 0.80 | 0.76 | (0–3.45) | ||||
| 2013 | 1.18 | 0.94 | (0–4.62) | |||||
| 2014 (excluded from analysis) | 2.11 | 1.76 | (0–12.5) | |||||
| 2015 | 1.42 | 1.19 | (0–6.45) | |||||
| b. Strategic Points (targeted surveillance) | ||||||||
| Class | Year | Number of sites | Positivity (% infested) | Proximity (% areal proportion) | ||||
| Mean | SD | Range | Mean | SD | Range | |||
| Construction | 2011 | 658 | 10.89 | 20.26 | (0–100) | 1.75 | 4.20 | (0–43.6) |
| 2012 | 838 | 6.87 | 14.60 | (0–100) | 1.35 | 3.28 | (0–27.3) | |
| 2013 | 1,115 | 6.96 | 14.17 | (0–100) | 1.99 | 4.19 | (0–31.4) | |
| 2014 | 1,225 | 7.79 | 16.03 | (0–100) | 1.13 | 3.06 | (0–27.8) | |
| 2015 | 1,089 | 9.64 | 18.82 | (0–100) | 1.70 | 4.11 | (0–37.0) | |
| Average | 985 | 8.43 | 16.78 | — | 1.58 | 3.81 | — | |
| Fabrication | 2011 | 128 | 9.60 | 20.79 | (0–100) | 0.48 | 1.62 | (0–16.0) |
| 2012 | 138 | 8.37 | 20.03 | (0–100) | 0.45 | 1.43 | (0–16.0) | |
| 2013 | 162 | 9.88 | 20.33 | (0–100) | 0.56 | 1.56 | (0–16.2) | |
| 2014 | 155 | 10.18 | 22.54 | (0–100) | 0.38 | 1.37 | (0–16.2) | |
| 2015 | 143 | 9.79 | 21.23 | (0–100) | 0.38 | 1.26 | (0–9.2) | |
| Average | 145.2 | 9.56 | 20.98 | — | 0.45 | 1.46 | — | |
| Recyclables | 2011 | 277 | 8.05 | 18.46 | (0–100) | 0.76 | 2.21 | (0–23.3) |
| 2012 | 292 | 4.43 | 13.64 | (0–100) | 0.46 | 1.55 | (0–18.4) | |
| 2013 | 325 | 4.38 | 11.16 | (0–100) | 0.56 | 1.77 | (0–18.4) | |
| 2014 | 323 | 5.96 | 14.75 | (0–100) | 0.47 | 1.49 | (0–14.5) | |
| 2015 | 284 | 5.18 | 15.41 | (0–100) | 0.41 | 1.52 | (0–18.4) | |
| Average | 300.2 | 5.60 | 14.68 | — | 0.53 | 1.73 | — | |
| Scrapyard | 2011 | 333 | 9.74 | 21.61 | (0–100) | 0.86 | 2.45 | (0–37.7) |
| 2012 | 352 | 7.43 | 18.32 | (0–100) | 0.67 | 1.87 | (0–18.0) | |
| 2013 | 397 | 7.40 | 16.81 | (0–100) | 0.78 | 2.06 | (0–23.3) | |
| 2014 | 406 | 7.94 | 18.30 | (0–100) | 0.51 | 1.49 | (0–13.8) | |
| 2015 | 364 | 9.33 | 21.26 | (0–100) | 0.62 | 1.63 | (0–10.8) | |
| Average | 370.4 | 8.37 | 19.26 | — | 0.69 | 1.93 | — | |
| Tires | 2011 | 975 | 5.62 | 12.71 | (0–100) | 1.84 | 3.66 | (0–30.2) |
| 2012 | 1,042 | 3.46 | 8.41 | (0–100) | 1.34 | 2.92 | (0–22.4) | |
| 2013 | 1,200 | 3.65 | 9.24 | (0–100) | 1.44 | 2.98 | (0–19.5) | |
| 2014 | 1,110 | 5.87 | 14.20 | (0–100) | 0.85 | 2.14 | (0–19.8) | |
| 2015 | 829 | 7.61 | 16.78 | (0–100) | 0.88 | 2.03 | (0–18.7) | |
| Average | 1,031.2 | 5.24 | 12.27 | — | 1.27 | 2.83 | — | |
| Others | 2011 | 236 | 15.29 | 24.36 | (0–100) | 1.33 | 3.22 | (0–40.6) |
| 2012 | 226 | 10.73 | 22.10 | (0–100) | 0.87 | 2.49 | (0–32.3) | |
| 2013 | 284 | 11.29 | 21.55 | (0–100) | 1.04 | 2.88 | (0–42.5) | |
| 2014 | 303 | 11.22 | 21.88 | (0–100) | 0.64 | 1.79 | (0–22.3) | |
| 2015 | 262 | 11.84 | 22.29 | (0–100) | 0.79 | 2.24 | (0–19.4) | |
| Average | 262.2 | 12.07 | 22.44 | — | 0.93 | 2.58 | — | |
| Total | 2011 | 2,607 | 8.38 | 12.02 | (0–100) | 6.59 | 8.48 | (0–70.15) |
| 2012 | 2,888 | 5.38 | 9.36 | (0–100) | 4.88 | 6.89 | (0–54.77) | |
| 2013 | 3,483 | 5.84 | 9.09 | (0–100) | 5.99 | 7.50 | (0–42.46) | |
| 2014 | 3,522 | 6.78 | 12.46 | (0–100) | 3.80 | 5.55 | (0–35.08) | |
| 2015 | 2,971 | 8.91 | 14.47 | (0–100) | 4.58 | 5.92 | (0–38.78) | |
| Average | 3,094.2 | 7.06 | 11.48 | — | 5.17 | 6.87 | — | |