The Indirect ELISA Trypanosoma evansi in Equids: Optimisation and Application to a Serological Survey including Racing Horses, in Thailand

Table 2

Results of ELISA T. evansi in 12 groups of mules, donkeys, and horses occasionally exposed to surra infection (# positive/# tested (seroprevalence %)) in Chang Mai.

Group number	Mules	Donkeys	Horses	Equines
Group 1	4/130 (3.1%)	—	—	4/130 (3.1%)
Group 2	1/123 (0.08%)	—	—	1/123 (0.08%)
Group 3	0/25 (0%)	—	—	0/25 (0%)
Group 4	—	—	0/13 (0%)	0/13 (0%)
Group 5	—	—	0/66 (0%)	0/66 (0%)
Group 6	0/49 (0%)	—	0/1 (0%)	0/50 (0%)
Group 7	—	—	0/79 (0%)	0/79 (0%)
Group 8	0/27 (0%)	—	0/21 (0%)	0/48 (0%)
Group 9	0/40 (0%)	—	—	0/40 (0%)
Group 10	0/7 (0%)	0/2 (0%)	0/31 (0%)	0/40 (0%)
Group 11	—	13/13 (100%)	19/19 (100%)	32/32 (100%)
Group 12	0/58 (0%)	0/26 (0%)	0/12 (0%)	0/96 (0%)
Global	5/459 (1%)	13/41 (31.7%)	19/242 (7.8%)	37/7412 (5%)