TABLE 2.

WN IgM-capture ELISA P/N ratios for chickens and other birds^a from New York City boroughs trapped and surveyed in September 1999

Species	P/N
Chicken	3.45
Chicken	2.87
Chicken	3.04
Chicken	1.66
Chicken	1.52
Chicken	1.95
Chicken	2.32
Chicken	4.34
Chicken	3.23
Chicken	4.46
Chicken	1.22
Chicken	2.72
Chicken	1.57
Chicken	2.27
Chicken	1.49
Chicken	1.27
Chicken	2.48
Chicken	2.52
Chicken	1.56
Chicken	1.78
Chicken	4.45
Chicken	4.97
Chicken	3.15
Chicken	1.82
Chicken	1.45
Chicken	3.02
Chicken	2.19
Chicken	2.34
Chicken	1.5
Canada goose	1.05
Canada goose	8.01c
Canada goose*	0.74Canada goose	0.82
Canada goose	-b
Domestic goose	0.76
Domestic goose	0.81
Domestic goose	0.60
Domestic goose	0.77
Domestic goose	0.70
Domestic goose	0.76
Domestic goose	5.98c
Mallard duck	0.86
Domestic turkey	0.74
Wild turkey	0.65
Rock dove	1.04
Rock dove	0.71
Rock dove	0.71
Rock dove	0.84
Rock dove	0.78
Rock dove	0.89
Rock dove	0.70
Rock dove	0.48
Rock dove	0.56
Rock dove	0.65
Rock dove	0.60
Rock dove	1.02
Rock dove	0.94
Mourning dove	0.58
House sparrow	1.20
House sparrow	-b
House sparrow	1.62
House sparrow	-b
House sparrow*	1.48
House sparrow	-b

^aThese birds had reciprocal 90% PRNT titers of ≥40, with the exception of the birds marked with an asterisk, which had titers of 10. A P/N of 2.0 is considered a positive result.

^b-, uninterpretable result due to background reaction on normal antigen.

^cA positive P/N ratio was confirmed by a repeat test.