Table 1.

AIV prevalence in white storks, cattle egrets, and gulls sampled in two landfills in South-Central Spain.

	Ciconia ciconia		Bubulcus ibis		Laridae		Total
Variables	AIV+/N	% Prev (CI)	AIV+/N	% Prev (CI)	AIV+/N	% Prev (CI)	AIV+/N	% Prev (CI)
Taxa*
	1/689	0.15 (0.03–0.82)	1/116	0.86 (0.15–4.72)	5/381	1.31 (0.56–3.03)	7/1186	0.60 (0.30–1.21)
AIV subtype	H11N9		H16N3		H16N3 × 2, H11N9, H11N3
Month
September-2014	0/26	0.00 (0.00–12.87)	0/10	0.00 (0.00–27.75)	0/0	0.00 (0.00–0.00)	0/36	0.00 (0.00–9.64)
October-2014	0/98	0.00 (0.00–3.80)	1/35	2.86 (0.51–14.53)	3/75	4.00 (1.37–11.11)	4/208	1.92 (0.75–4.84)
November-2014	0/91	0.00 (0.00–4.05)	0/30	0.00 (0.00–11.35)	0/46	0.00 (0.00–7.71)	0/167	0.00 (0.00–2.25)
December-2014	0/135	0.00 (0.00–2.77)	0/34	0.00 (0.00–10.15)	1/69	1.45 (0.26–7.76)	1/238	0.42 (0.07–2.34)
January-2015	1/127	0.80 (0.14–4.33)	0/0	0.00 (0.00–0.00)	0/71	0.00 (0.00–5.13)	1/198	0.50 (0.09–2.80)
February-2015	0/126	0.00 (0.00–2.96)	0/7	0.00 (0.00–35.43)	1/60	1.67 (0.30–8.86)	1/193	0.52 (0.09–2.87)
March-2015	0/86	0.00 (0.00–4.30)	0/0	0.00 (0.00–0.00)	0/60	0.00 (0.00–6.02)	0/146	0.00 (0.00–2.60)
Migratory period
Southward migration	0/26	0.00 (0.00–12.87)	0/10	0.00 (0.00–27.80)	0/0	0.00 (0.00–0.00)	0/36	0.00 (0.00–9.64)
Wintering	0/324	0.00 (0.00–1.17)	1/99	1.01 (0.18–5.50)	4/190	2.11 (0.82–5.30)	5/613	0.82 (0.35–1.89)
Northward migration	1/339	0.30 (0.05–1.65)	0/7	0.00 (0.00–35.43)	1/191	0.52 (0.09–2.90)	2/537	0.37 (0.10–1.34)

N, number of collected samples; AIV, number of AIV-positives in rRT-PCR and AIV subtypes; CI, 95% confidence interval.

*Significant variables with p < 0.05.