Table 2. Results of virus neutralization tests performed to determine if the anti-flavivirus antibodies found in the egg extracts or chick sera were specific to West Nile (WNV), Usutu (USUV), tick-borne encephalitis (TBEV), or Meaban viruses.

Country	Sample	Colony	Year	ELISA (N)	WNV (N)	USUV (N)	TBEV (N)	Meaban virus (N)
France	Egg extracts	Corrège	2009	1(32)	0 (1)	0 (1)	0 (1)	1 (1)
			2010	1 (32)	0 (1)	0 (1)	0 (1)	-
		Villeneuve	2009	1 (32)	0 (1)	0 (1)	0 (1)	1 (1)
Spain	Egg extracts	L'Escala	2010	4 (6)	0 (2)	0 (2)	0 (2)	2 (2)
		Medes	2009	14 (38)	0 (14)	0 (2)	0 (2)	14 (14)
			2010	24 (49)	0 (22)	0 (3)	0 (4)	22 (22)
			2011	33 (49)	0 (33)	0 (3)	1* (3)	33 (33)
			2012	34 (51)	0 (34)	-	-	34 (34)
	Chick sera	Medes	2009	0 (59)	-	-	-	-
			2010	3 (120)	0 (3)	-	-	3 (3)
			2011	0 (76)	-	-	-	-
			2012	13 (246)	3* (13)	-	-	13 (13)
	Adult sera	Medes	2009	1 (1)	0 (1)	-	-	1 (1)
			2012	1 (1)	0 (1)	-	-	1 (1)
Algeria	Egg extracts	Jijel	2010	1 (31)	0 (1)	0 (1)	-	0 (1)

The numbers indicate the number of positive samples titer values ≥20).

The sample size is indicated in parentheses. The * indicates samples in which titer values were equal to 20 for WNV or TBEV whereas they were ≥20 for Meaban virus.