Volume 28, Number 7—July 2022
Research
Effect of Agroecosystems on Seroprevalence of St. Louis Encephalitis and West Nile Viruses in Birds, La Pampa, Argentina, 2017–2019
Table 2
Number of positive/total SLEV/WNV samples collected per site, seroprevalence in birds, and environmental and biological variables in study of effect of agroecosystems on seroprevalence of SLEV and WNV in birds, La Pampa, Argentina, 2017–2019*
Site | SLEV | %, (95% CI) | WNV | % (95% CI) | TC, km2 | AA, km2, | UD, km | WD, km | DA† | SA‡ | CA§ |
---|---|---|---|---|---|---|---|---|---|---|---|
LP1 | 18/63 | 28.57 (17.8–41.3) | 4/63 | 6.35 (1.7–15.4) | 0.17 | 6.89 | 8.95 | 2.13 | 56 | 0 | 15 |
LP2 | 17/100 | 17 (10.2–25.8) | 6/100 | 6 (2.2–12.6) | 0.22 | 6.83 | 2.04 | 2.06 | 109 | 50 | 40 |
LP3 | 6/78 | 7.69 (2.8–15.9) | 2/78 | 2.56 (0.3–8.9) | 0.51 | 6.55 | 3.25 | 7.17 | 115 | 0 | 18 |
LP4 | 5/107 | 4.67 (1.5–10.5) | 0/107 | 0 (0–3.4) | 0.89 | 6.17 | 12.98 | 3.22 | 196 | 0 | 46 |
LP5 | 0/104 | 0 (0–3.5) | 0/104 | 0 (0–3.5) | 0.11 | 6.95 | 2.45 | 0.59 | 22 | 120 | 150 |
LP6 | 0/101 | 0 (0–3.5) | 1/101 | 0.99 (0.02–5.4) | 0.47 | 6.59 | 7.95 | 6.31 | 926 | 53 | 520 |
LP7 | 1/85 | 1.17 (0.6.3) | 2/85 | 2.35 (0.2–8.2) | 0.36 | 6.7 | 5.28 | 3.45 | 186 | 0 | 255 |
LP8 | 0/71 | 0 (0–5) | 0/71 | 0 (0–5) | 0.04 | 7.02 | 5.2 | 0.62 | 37 | 5 | 30 |
LP9 | 1/73 | 1.37 (0.03–7.3) | 0/73 | 0 (0–4.9) | 0.48 | 6.57 | 0.36 | 1.34 | 120 | 50 | 27 |
LP10 | 1/89 | 1.12 (0.02–6.1) | 0/89 | 0 (0–4) | 0.1 | 6.96 | 1.16 | 0.83 | 73 | 20 | 32 |
LP11 | 4/60 | 6.66 (1.8–16.1) | 3/60 | 5 (1–13.9) | 0.03 | 7.03 | 9.3 | 0.05 | 82 | 40 | 27 |
LP12 | 7/88 | 7.95 (3.2–15.7) | 3/88 | 3.41 (0.7–9.6) | 0.004 | 7.06 | 12.56 | 0.32 | 47 | 30 | 37 |
*AA, agricultural area; CA, cowbird abundance; DA, dove abundance; SA, sparrow abundance; SLEV, St. Louis encephalitis virus; TC, tree coverage; UD, distance to the closest urban settlement; WD, distance to the nearest water body; WNV, West Nile virus, †No. eared doves (Zenaida auriculata) + Picui ground doves (Columbina picui) + spot-winged pigeons (Patagioenas maculosa). ‡No. house sparrows (Passer domesticus). §No. grayish baywings (Agelaioides badius) + shiny cowbirds (Molothrus bonariensis).
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