1
Chronic Wasting Disease (CWD) Sample Collection Interim Study
Justin Roach, DVMRod Hall, DVMOklahoma Department of Agriculture, Food & ForestryAnimal Industry Services
October 18, 2012
2
Disease Description Transmissible Spongiform Encephalopathy
of cervidae species Transmission routes from multiple bodily
fluids Long incubation periods Clinical Signs: Progressive weight loss,
neurological abnormalities, behavorial changes, excessive drinking & urination, profuse salivation
Invariably fatal
3
4
CWD Distribution in Wild Cervidae
5
Distribution in Captive Cervidae
6
Chronic Wasting Disease Herd Certification Program
Voluntary Program Participation is Free of Charge Required by Federal Code to participate in
interstate commerce Participants must have all deaths over 12
months of age sampled and tested for CWD In Oklahoma sampling can only be
performed by accredited veterinarians Federal code allows states to determine
who is eligible to perform sampling
7
CWD Diagnostics
No antemortem tests available Immunohistochemistry of obex and
medial retropharyngeal lymph nodes Obex is the best sample for clinical
animals MRPLNs are more critical in pre-
clinical diagnosis
8
Obex Collection Video
9
Medial Retropharyngeal Lymph Nodes Collection Video
10
11
12
FUTURE OF CWD PROGRAM
Our job is to protect the livestock and public of Oklahoma and assist our livestock producers to be as successful as possible
13
FUTURE OF CWD PROGRAM
Federal regulations were suspended in 2006
For the past 6 years ODAFF has set regulations based on the general guidance of the suspended Federal rules
14
FUTURE OF CWD PROGRAM
We have tried to help our producers while maintaining standards that enable our producers to sell cervids to other states
New Federal rule went into effect 8/7/2012
15
FUTURE OF CWD PROGRAM Federal oversight of the program will
be much more strict now Oklahoma will be in provisional status
for the first year of the review process If Oklahoma does not achieve and
maintain Consistent State Status our producers will not be able to sell deer to other states
16
FUTURE OF CWD PROGRAM The expertise required to collect
Medial Retropharyngeal Lymph Nodes is greater than just collecting the brain stem
Any test eligible animals not sampled properly may require 2 animals to be sampled in the next year
We have required Accredited veterinarians to take these samples
17
FUTURE OF CWD PROGRAM Accredited veterinarians have special
training to represent ODAFF and USDA in regulatory programs
They have helped us eradicate brucellosis, hog cholera, foot and mouth disease, and others
If producers are legally approved to take samples they must be approved by ODAFF by demonstrating sampling competancy
18
Questions?