Table 1.
Distribution of reactors of tuberculin skin tests at various cutoff points and antibovine tuberculosis antibody assay (according to region, sex, age, and herd size) in cattle in Cameroon.
| Variable/Label | Number of animals tested | SICCT-BT reactors (%) | SIT-BT reactors | SICCT BT doubtful/SIT-BT positive reactors (%) | SICCT BT doubtful/SIT BT doubtful responses (%) | Excess A* (%) | % of SICCT-BT doubtful and classed positive at inferior cutoff points (%) | Antibovine TB Ab reactors# (%±SE) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| T4 | T3 | T2 | XD4 | XD3 | XD2 | Xd4 | Xd3 | Xd2 | XD4 at ≥3 mm |
XD4 + XD3 at ≥2 mm |
|||||
| All animals | 807 | 3.59 | 8.92 | 11.77 | 13.14 | 3.72 | 0.87 | 0.50 | 5.08 | 2.60 | 0.12 | 4.46 | 2.97 | 3.84 | 37.17 ± 3.33 |
| Agroecological Regions | |||||||||||||||
| Adamawa plateaux | 363 | 0.28 | 0.28 | 0.55 | 0.55 | 0.28 | 0.28 | 0.00 | 0.28 | 0.28 | 0.28 | 0.00 | 0.00 | 0.28 | 29.75 ± 4.70 |
| Western Highlands | 444 | 6.31 | 15.99 | 20.95 | 23.42 | 6.53 | 1.35 | 0.90 | 9.01 | 4.50 | 0.00 | 8.11 | 5.41 | 6.76 | 43.24 ± 4.61 |
| Sex and Age | |||||||||||||||
| Female | 647 | 4.02 | 8.96 | 11.44 | 13.14 | 4.17 | 1.08 | 0.62 | 4.64 | 2.16 | 0.15 | 4.48 | 3.25 | 4.33 | 36.32 ± 3.71 |
| Male | 160 | 1.88 | 8.75 | 13.13 | 13.13 | 1.88 | 0.00 | 0.00 | 6.88 | 4.38 | 0.00 | 4.38 | 1.88 | 1.88 | 40.63 ± 7.61 |
| Young (o 4 years) |
481 | 3.33 | 8.32 | 11.02 | 11.85 | 3.33 | 0.42 | 0.21 | 4.99 | 2.49 | 0.00 | 3.53 | 2.91 | 3.33 | 38.46 ± 4.35 |
| Adult (>4 years) |
326 | 3.99 | 9.82 | 12.88 | 15.03 | 4.29 | 1.53 | 0.92 | 5.21 | 2.76 | 0.31 | 5.83 | 3.07 | 4.60 | 35.28 ± 5.19 |
| Herd sizes | |||||||||||||||
| Animals ≤ 40 | 169 | 5.92 | 10.06 | 12.43 | 13.02 | 6.51 | 1.18 | 0.59 | 2.96 | 1.78 | 0.00 | 4.14 | 5.92 | 7.10 | 28.99 ± 6.84 |
| Animals > 40 | 638 | 2.98 | 8.62 | 11.60 | 13.17 | 2.98 | 0.78 | 0.47 | 5.64 | 2.82 | 0.16 | 4.55 | 2.19 | 2.98 | 39.34 ± 3.79 |
T4, T3, T2, XD4, XD3, XD2, Xd4, Xd3, Xd2, and Excess A are as defined in Figure 2.
SICCT-BT: Single Intradermal Comparative Cervical Tuberculin skin test for the detection of bovine tuberculosis.
SIT-BT: Single Intradermal Tuberculin skin test for the detection of bovine tuberculosis.
Antibovine TB Ab: Antibovine tuberculosis antibody assay.
# Breed: Upgraded/Exotic = 42.03 ± 6.72; Gudali = 31.30 ± 4.10; Namchi = 22.58 ± 14.72; Red Bororo = 67.53 ± 10.46.
Management and production system: Extensive = 31.76 ± 4.13; Intensive = 75.00 ± 30.01; Semi-intensive = 44.69 ± 5.53;
Beef herds = 38.07 ± 3.70; Dairy herds = 33.10 ± 7.66.