TABLE 1 .

Demographic characteristics of study participants^a

Characteristic	No.	%
Gender
Male	47	49
Female	47	49
Unknown	1	1
Age (yrs)
20–29	24	25
30–39	35	37
40–49	15	16
50–59	10	11
60–69	9	9
70–79	1	1
Unknown	1	1
Race/ethnicity
White, non-Latino	87	92
Latino	1	1
Asian/Pacific Islander	2	2
Other/multiracial	5	5
Experience (yrs)
<1 year	6	6
1–2 years	8	8
2–5 years	14	15
>5 years	67	71
Work experience
Banding and measuring	89	94
Bleeding	60	63
Cloacal swabbing	22	23
Sample collection and preparation	12	13
General care	1	1
Surgery	0
Otherb	7	7
Avian species handledc
Passerines	81	85
Raptors	21	22
Waterfowl	16	17
Shorebirds	16	17
Poultryd	7	7.4
Othere	12	13
Handling season (North America)
Spring	78	82
Summer	85	89
Fall	55	58
Winter	50	53

^aThe total number of participants was 95; the values in the table omit missing data (e.g., no answer was given).

^bSpecified work experience included experimental infections, catch and release, and nest monitoring.

^cParticipants could indicate exposure to more than one avian species.

^dPoultry handling reported included both occupational and recreational exposure.

^eSpecified avian species handled included other sea birds, such as those belonging to the order Pelecaniformes.