Table 4.

Number of observations and seroprevalence per age group in pastoral and ranching herds

	Pastoral		Ranching
Age	No. sampled	% Positive (95% CI)	No. sampled	% Positive (95% CI)
<1 year	143	42.0 (33.9–50.0)	14	0
1–2 years	203	51.2 (44.4–58.1)	20	15 (−0.6 to 30.6)
2–3 years	143	66.4 (58.7–74.2)	13	0
>3 years	803	78.8 (76.0–81.7)	82	12.2 (5.1–19.3)