Table-5.
Chi-square value and percent of resistant strains presence in descending order for each significant disinfectant type (T) and frequency (F) of use or change.
| Floor (T) (Chi=8.008) | Hoof dip (T) (Chi=19.858) | Teat dip (T) (Chi=17.549) |
| Slaked lime (19.6%) | Formalin+CuSO4 (100%) | Iodophor (27.9%) |
| No (0) | CuSO4+ZnSO4 (40%) | No (14.3%) |
| Quick lime (0) | Formalin (23.8%) | NaOCl (0) |
| Wheel dip (T) (Chi=24.04) | CuSO4 (23.7%) | QACs (0) |
| Phenol (34.9%) | No (3%) | Milk line (T) (Chi=16.48) |
| Formalin (15%) | Hoof dip (F) (Chi=18.59) | NaOH+nitric acid+NaOCl (33.3%) |
| No (1.4%) | Per 250 cows (50%) | NaOH+nitric acid (22.7%) |
| Wheel dip (F) (Chi=20.964) | Per 500 cows (23.1%) | No (14.3%) |
| Monthly (42.9%) | Per 200 cows (22.2%) | Milk tanks (T) (Chi=17.857) |
| Weekly (26.8%) | No (3%) | NaOCl (29.2%) |
| No (1.4%) | General parlor (T) (Chi=19.36) | Peroxygen (23.1%) |
| Foot dip (T) (Chi=15.463) | Iodine (36.8%) | No (14.3%) |
| Phenol (38.5%) | NaOCl (24.1%) | Peracetic acid (0) |
| No (8.8%) | Peroxygen (23.1%) | H2O2 (0) |
| Formalin (0) | No (14.3%) | QACs (0) |
| Calf feeders (F) (Chi=18.359) | Peracetic acid (0) | Disinfectants rate use (Chi=28.473) |
| Between calves (29.3%) | H2O2 (0) | High (34.6%) |
| Daily (21.2%) | Low (1.3%) | |
| Random (0) | ||
| Weekly (0) |
No=Means that the farm does not use any disinfectant in this disinfection process. NaOCl=Sodium hypochlorite, QACs=Quaternary ammonium compounds