2012 Brucellosis Surveillance in Hunter-Killed Elk

Brucellosis Surveillance in Hunter-Killed Elk

Monitor brucellosis in non-feedground herds Surveillance geared toward hunter-killed cow

elk› 6000 – 8000 Blood collection kits mailed to

hunters in target hunt areas (limited quota) › ~600 – 900 useable samples (40-50-50)

Statewide coverage every 4-5 years

2012 Surveillance

Developed with WLSB input/support Surrounding DSA / northeastern quarter Increased sample collections

› Hunter Management Coordinators› Blood/tissue sample technician› Opportunistic sampling

~10,000 Blood collection kits

2012 Surveillance Results

1,437 samples received › 894 (62%) suitable for testing

8.9% seroprevalence in northern herd units› 13.3% in 2011, 15.3% in 2010

0% seroprevalence in southern herd units› 5.5% in 2011, 3.2% in 2010

Target Area Serology

Elk hunt areas surrounding positive cattle herds –cows only. ( ) = 2011 data

Hunt Area Seroprevalence Samples (adult ♀)

61 7.8% (11.8%) 179 (93)

62 23.1% (10.8%) 26 (37)

63 5.1% (12.8%) 39 (39)

Total 9.0% (11.8%) 244 (169)

Hunt Area 40

Positives› Bull harvested near Bear Creek drainage› Cow harvested on Bald Mountain › Moderate to strong titers

601 Blood sample kits mailed› 58 Samples returned – 26 suitable for testing› 13 Samples tested in 2006 – 40 in 2011

2013 Surveillance

Intensive surveillance in/around HA 40 Continue monitoring DSA

› Target areas within DSA (61 – 63)› Limited quota HA surrounding boarder

Increased sample collections› Hunter Management Coordinators› Opportunistic sampling

Continue statewide surveillance (southeast)