Table 1

Experimental groups. Five groups of antigens, based on specific steps performed during processing

Processing steps
Bovine Group
Porcine Group
Ovine Group
Equine Group

Group 1 – untreated
B1
P1
O1
E1
Group 2 – after cleaning in increasing strengths of ethanol
B2
P2
O2
N/A
Group 3 – after cleaning in ethanol and methylene chloride
B3
P3
O3
N/A
Group 4 – after photooxidation process
B4
P4
O4
N/A
Group 5 – after sterilization with Gamma radiation
B5
P5
O5
E5

Hetherington et al. BMC Musculoskeletal Disorders 2005 6:36   doi:10.1186/1471-2474-6-36