Table 2.
Medians of the herd A. marginale seroprevalence, B. Bovis and B. bigemina. h distribution compared across 18 categoric factors of 28 properties from the Reconcavo Baiano region, State of Bahia, Brazil
| A. marginale seroprevalence | B. bovis h | B. bigemina h | |||||||
|---|---|---|---|---|---|---|---|---|---|
|
Independent variable (n)
Category (n) |
Median
(%) |
IQR
(%) |
p |
Median
(h) |
IQR
(%) |
p |
Median
(h) |
IQR
(%) |
p |
| Genetic composition (28) | 0.229 | 0.004 | 0.023 | ||||||
| European (10) | 22.5 | 9.75–25.8 | 0.002 | 0.002–0.002 | 0.003 | 0.002–0.003 | |||
| Indian (18) | 14 | 4-19.8 | 0.005 | 0.004-0.00675 | 0.004 | 0.003-0.00675 | |||
| Production system (28) | 0.149 | 0.064 | 0.194 | ||||||
| Beef (16) | 14 | 3.5–19.3 | 0.0045 | 0.00375–0.00625 | 0.004 | 0.003-0.00625 | |||
| Dairy (12) | 22.5 | 5.5–26.3 | 0.002 | 0.002-0.00525 | 0.003 | 0.002-0.00525 | |||
| Cattle reposition (14) | 0.44 | 0.948 | 0.218 | ||||||
| From Atlantic Forest biome (7) | 18 | 5-24.5 | 0.005 | 0.003–0.008 | 0.004 | 0.003–0.006 | |||
| From Caatinga biome (7) | 6 | 3–18 | 0.006 | 0.0025–0.007 | 0.007 | 0.005–0.01 | |||
| Tick infestation occurrence (28) | 0.336 | 0.624 | 0.542 | ||||||
| Part of the year (10) | 20.5 | 16.8–23.5 | 0.0045 | 0.0025–0.00575 | 0.0035 | 0.003-0.00575 | |||
| All through the year (18) | 11.5 | 4-24.5 | 0.0035 | 0.002-0.00575 | 0.0035 | 0.002–0.0065 | |||
| Criteria for acaricide treatments (28) | 0.361 | 0.466 | 0.367 | ||||||
| Systematic or prophylactic (9) | 18 | 4–20 | 0.004 | 0.002–0.007 | 0.004 | 0.003–0.006 | |||
| High tick infestation in cattle (19) | 16 | 5-26.5 | 0.004 | 0.002–0.005 | 0.003 | 0.0025–0.0055 | |||
| Injectable acaricide formulations (28) | 0.026 | 0.002 | 0.082 | ||||||
| Yes (22) | 11.5 | 4-19.8 | 0.005 | 0.00325-0.006 | 0.004 | 0.003-0.00675 | |||
| No (6) | 24 | 22.3–25.8 | 0.002 | 0.00125-0.002 | 0.003 | 0.00225-0.003 | |||
| Pour-on acaricide formulations (28) | 1.000 | 0.529 | 0.776 | ||||||
| Yes (22) | 17 | 4.5–23.8 | 0.004 | 0.002–0.006 | 0.0035 | 0.003-0.00575 | |||
| No (6) | 17.5 | 7-24.3 | 0.003 | 0.002-0.00475 | 0.003 | 0.002–0.0085 | |||
| Spray acaricide formulations (28) | 0.554 | 0.029 | 0.048 | ||||||
| Yes (19) | 18 | 4-25.5 | 0.002 | 0.002–0.005 | 0.006 | 0.004–0.007 | |||
| No (9) | 11 | 6–20 | 0.006 | 0.004–0.006 | 0.003 | 0.002–0.0045 | |||
| Use of avermectins (ivermectin - doramectin) (27) | 0.026 | 0.003 | 0.080 | ||||||
| Yes (22) | 11.5 | 4-19.8 | 0.005 | 0.00325-0.006 | 0.004 | 0.003-0.00675 | |||
| No (5) | 25 | 22–26 | 0.002 | 0.001–0.002 | 0.003 | 0.002–0.003 | |||
| Use of pyrethroids (27) | 0.676 | 0.572 | 0.480 | ||||||
| Yes (25) | 16 | 4–24 | 0.004 | 0.002–0.006 | 0.003 | 0.003–0.006 | |||
| No (2) | 19.5 | 19.3–19.8 | 0.005 | 0.0045–0.0055 | 0.005 | 0.0045–0.0055 | |||
| Use of amitraz (27) | 0.334 | 0.360 | 0.601 | ||||||
| Yes (1) | 25 | 25–25 | 0.002 | 0.002–0.002 | 0.005 | 0.005–0.005 | |||
| No (26) | 16 | 4-22.8 | 0.004 | 0.002–0.006 | 0.0035 | 0.003–0.006 | |||
| Use of fipronil (27) | 0.036 | 0.152 | 0.374 | ||||||
| Yes (13) | 6 | 2–20 | 0.005 | 0.002–0.007 | 0.004 | 0.003–0.006 | |||
| No (14) | 21 | 12.3–27.5 | 0.0035 | 0.002–0.005 | 0.003 | 0.00225–0.00575 | |||
| Use of organophosphates (27) | 0.732 | 0.466 | 0.972 | ||||||
| Yes (23) | 12 | 4-24.5 | 0.004 | 0.002–0.0055 | 0.004 | 0.003–0.0065 | |||
| No (4) | 18.5 | 17.5–19.3 | 0.005 | 0.0035–0.007 | 0.0035 | 0.003–0.0045 | |||
| Rotation of acaricide compound (27) | 0.579 | 0.459 | 0.818 | ||||||
| Yes (10) | 14 | 2.5–23.3 | 0.004 | 0.002-0.00475 | 0.0035 | 0.003-0.00475 | |||
| No (17) | 18 | 6–23 | 0.005 | 0.002–0.006 | 0.004 | 0.003–0.007 | |||
| Multiple acaricides classes used simultaneously (28) | 0.235 | 0.218 | 0.237 | ||||||
| Yes (12) | 16 | 3.5–20.3 | 0.0045 | 0.002–0.007 | 0.004 | 0.003–0.007 | |||
| No (16) | 20.5 | 6-26.3 | 0.0035 | 0.002–0.005 | 0.003 | 0.002-0.00525 | |||
| Use different products with same compound (27) | 0.607 | 0.487 | 0.551 | ||||||
| Yes (15) | 16 | 4-24.5 | 0.004 | 0.002–0.005 | 0.003 | 0.003–0.005 | |||
| No (12) | 14.5 | 5.5–20.5 | 0.0045 | 0.00275–0.00625 | 0.004 | 0.003–0.007 | |||
Note: Mann Whitney test. Variables with P values in bold were considered significative. Interquartile range, IQR. Herd inoculation rate, h