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Volume 14, Number 4—April 2008
Letter
West Nile Virus in Birds, Argentina
Luis Adrián Diaz*
, Nicholas Komar†, Andres Visintin*, María Julia Dantur Juri‡, Marina Stein§, Rebeca Lobo Allende‡, Lorena Spinsanti*, Brenda Konigheim*, Javier Aguilar*, Magdalena Laurito*, Walter Almirón*, and Marta Contigiani*
, Nicholas Komar†, Andres Visintin*, María Julia Dantur Juri‡, Marina Stein§, Rebeca Lobo Allende‡, Lorena Spinsanti*, Brenda Konigheim*, Javier Aguilar*, Magdalena Laurito*, Walter Almirón*, and Marta Contigiani*
Table
Prevalence of West Nile virus–neutralizing antibodies among birds grouped by taxonomic family, sampled in Chaco, Córdoba, and Tucumán Provinces, Argentina, 2004–2006*
| Bird family | No. positive | No. tested | % Positive (95% CI) | Range of PRNT80 titer† |
|---|---|---|---|---|
| Cardinalidae | 2 | 54 | 3.7 (1.0–12.5) | 80–160 |
| Columbidae | 4 | 270 | 1.5 (0.6–3.8) | 80–1,280 |
| Dendrocolaptidae | 4 | 17 | 23.5 (9.6–47.3) | 320–2,560 |
| Falconidae | 3 | 5 | 60.0 (23.1–88.2) | 320–2,560 |
| Furnariidae | 12 | 201 | 6.0 (3.4–10.1) | 80–1,280 |
| Icteridae | 3 | 137 | 2.2 (0.7–6.2) | 40–320 |
| Passeridae | 1 | 87 | 1.1 (0.2–6.2) | 40 |
| Phasianidae | 2 | 8 | 25.0 (7.1–59.1) | 320 |
| Polioptilidae | 2 | 7 | 28.6 (8.2–64.1) | 80–640 |
| Troglodytidae | 1 | 17 | 5.9 (1.0–27.0) | 80 |
| Turdidae | 8 | 132 | 6.1 (3.1–11.5) | 40–1,280 |
| Tyrannidae | 1 | 370 | 0.3 (0.05–1.5) | 160 |
*Most of these families are of the order Passeriformes except for Falconidae (Falconiformes), Phasianidae (Galliformes), and Columbidae (Columbiformes). CI, confidence internal, determined by the Wilson score method for binomial proportions, without continuity correction.
†PRNT, plaque-reduction neutralization test. Titers are expressed as inverse of dilution.
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