Table 3.
Frequency of SLEV-Specific Antibodies by ELISA in Horses by Age, Gender, and Origin
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Frequency of SLEV antibodies |
Frequency of SLEV antibodies |
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| Location type | CategoryAge (y) | No. tested | No. (%) positive by ELISA | Male (n=89) | Female (n=226) | Foreign bred (n=89) | Locally bred (n=207) | NA (n=19) | |||||
| Stud farm | <1 | 27 | 2 (7.4) | 12 | 1 (0.7) | 15 | 1 (6.7) | 1 | 0 (0.0) | 26 | 2 (7.7) | 0 | 0 (0.0) |
| 1–5 | 83 | 8 (9.6) | 37 | 4 (10.8) | 46 | 4 (8.7) | 23 | 4 (17.4) | 56 | 4 (7.1) | 4 | 0 (0.0) | |
| 6–10 | 128 | 17 (13.3) | 31 | 6 (19.4) | 97 | 11 (1.0) | 42 | 5 (11.9) | 82 | 12 (14.6) | 4 | 0 (0.0) | |
| >10 | 60 | 4 (6.7) | 5 | 0 (0.0) | 55 | 4 (7.3) | 21 | 1 (4.8) | 39 | 3 (7.7) | 0 | 0 (0.0) | |
| NA | 17 | 0 (0.0) | 4 | 0 (0.0) | 13 | 0 (0.0) | 2 | 0 (0.0) | 4 | 0 (0.0) | 11 | 0 (0.0) | |
| Subtotal | 315 | 31 (9.8) | 89 | 11 (12.4) | 226 | 20 (8.8) | 89 | 10 (11.2) | 207 | 21 (10.1) | 19 | 0 (0.0) | |
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Frequency of SLEV antibodies |
Frequency of SLEV antibodies |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Equestrian facility | CategoryAge (y) | No. tested | No. (%) positive | Male (n=29) | Female (n=12) | Foreign bred (n=8) | Locally bred (n=32) | NA (n=1) | |||||
| <1 | 0 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | |
| 1–5 | 10 | 2 (20.0) | 7 | 2 (28.6) | 3 | 0 (0.0) | 1 | 0 (0.0) | 9 | 2 (22.2) | 0 | 0 (0.0) | |
| 6–10 | 14 | 2 (14.3) | 10 | 1 (10.0) | 4 | 1 (25.0) | 4 | 0 (0.0) | 10 | 2 (20.0) | 0 | 0 (0.0) | |
| >10 | 16 | 4 (23.5) | 11 | 4 (36.4) | 5 | 0 (0.0) | 3 | 2 (66.7) | 13 | 2 (15.4) | 0 | 0 (0.0) | |
| NA | 1 | 0 (0.0) | 1 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | 1 | 0 (0.0) | |
| Subtotal | 41 | 8 (19.5) | 29 | 7 (24.1) | 12 | 1 (8.3) | 8 | 2 (25.0) | 32 | 6 (18.8) | 1 | 0 (0.0) | |
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Frequency of SLEV antibodies |
Frequency of SLEV antibodies |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Race track | CategoryAge (y) | No. tested | No. (%) positive | Male (n=82) | Female (n=68) | Foreign bred (n=24) | Locally bred (n=102) | NA (n=24) | |||||
| <1 | 0 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | |
| 1–5 | 113 | 7 (6.2) | 70 | 5 (7.1) | 43 | 2 (4.7) | 19 | 3 (15.8) | 90 | 4 (4.4) | 4 | 0 (0.0) | |
| 6–10 | 15 | 0 (0.0) | 12 | 0 (0.0) | 3 | 0 (0.0) | 4 | 0 (0.0) | 11 | 0 (0.0) | 0 | 0 (0.0) | |
| >10 | 1 | 0 (0.0) | 0 | 0 (0.0) | 1 | 0 (0.0) | 1 | 0 (0.0) | 0 | 0 (0.0) | 0 | 0 (0.0) | |
| NA | 21 | 3 (14.3) | 0 | 0 (0.0) | 21 | 3 (14.3) | 0 | 0 (0.0) | 1 | 0 (0.0) | 20 | 3 (15.0) | |
| Subtotal | 150 | 10 (6.7) | 82 | 5 (6.1) | 68 | 5 (7.4) | 24 | 3 (12.5) | 102 | 4 (3.9) | 24 | 3 (12.5) | |
| Total | 506 | 49 (9.7) | 200 | 23 (11.5) | 306 | 27 (8.8) | 121 | 15 (12.4) | 341 | 31 (9.0) | 44 | 4 (8.9) | |
SLEV, St. Louis encephalitis virus; ELISA, enzyme-linked immunosorbent assay; NA, not applicable due to unknown status.