Volume 17, Number 10—October 2011
Dispatch
Outbreak of West Nile Virus Infection in Greece, 2010
Kostas Danis
, Anna Papa, George Theocharopoulos, Georgios Dougas, Maria Athanasiou, Marios Detsis, Agoritsa Baka, Theodoros Lytras, Kassiani Mellou, Stefanos Bonovas, and Takis Panagiotopoulos
, Anna Papa, George Theocharopoulos, Georgios Dougas, Maria Athanasiou, Marios Detsis, Agoritsa Baka, Theodoros Lytras, Kassiani Mellou, Stefanos Bonovas, and Takis PanagiotopoulosTable 1
Characteristics of 197 patients with West Nile neuroinvasive disease. Greece, July–October 2010*
| Characteristic | No. patients | Incidence per 100,000 population | Risk ratio (95% CI) |
|---|---|---|---|
| Age group, y | |||
| <20 | 4 | 0.18 | Reference |
| 20–29 | 3 | 0.20 | 1.08 (0.24–4.84) |
| 30–39 | 6 | 0.34 | 1.87 (0.53–6.63) |
| 40–49 | 9 | 0.55 | 3.03 (0.93–9.82) |
| 50–59 | 18 | 1.27 | 6.93 (2.35–20.49) |
| 60–69 | 29 | 2.44 | 13.31 (4.68–37.84) |
| 70–79 | 85 | 8.01 | 43.74 (16.05–119.2) |
| >80 |
43 |
9.63 |
52.62 (18.89–146.6) |
| Sex | |||
| F | 88 | 1.59 | Reference |
| M |
109 |
1.97 |
1.26 (0.95–1.67) |
| Place of residence | |||
| Urban | 110 | 1.38 | Reference |
| Rural |
87 |
2.92 |
2.12 (1.60–2.80) |
| Districts in Central Macedonia | |||
| Chalkidiki | 4 | 3.99 | 0.76 (0.28– 2.09) |
| Thessaloniki | 60 | 5.27 | Reference |
| Pieria | 9 | 7.02 | 1.33 (0.66–2.69) |
| Serres | 21 | 11.15 | 2.12 (1.29–3.48) |
| Kilkis | 12 | 13.92 | 2.64 (1.42–4.91) |
| Imathia | 39 | 27.06 | 5.14 (3.43–7.69) |
| Pella | 41 | 28.26 | 5.37 (3.61–7.98) |
| Total |
186 |
15.00 |
NA |
| Other districts (region) | |||
| Etoloakarnania (western Greece) | 1 | 0.46 | 0.09 (0.01–0.63) |
| Kozani (Western Macedonia) | 1 | 0.65 | 0.12 (0.02–0.89) |
| Kavala (Eastern Macedonia) | 1 | 0.71 | 0.14 (0.02–0.98) |
| Larissa (Thessalia) |
8 |
2.80 |
0.53 (0.25–1.11) |
| Total in Greece | 197 | 1.76 | NA |
*Incidence rates were calculated by using 2008 mid-year population estimates of the Hellenic Statistical Authority as the denominator. CI, confidence interval; NA, not applicable.
