Table 2.
Bivariate analysis of factors associated to Theileria equi infection in tick samples, by real-time PCR, according to samples characteristics, as locality, identified species, developmental stage, and tick gender in the state of Rio de Janeiro, Brazil
| Tick samples characteristics | Real-time PCR | Bivariate | ||
|---|---|---|---|---|
| Number of animals sampled | Positives (%) | χ 2 | P | |
| Altitude | ||||
| <400 m (Seropedica) | 238 | 6.69 | − | 0.28a |
| >400 m (Petropolis) | 62 | 11.29 | ||
| Species | ||||
| Amblyomma cajennense | 191 | 9.95 | 3.96 | 0.07a |
| Dermacentor nitens | 104 | 3.85 | ||
| Developmental stage | ||||
| Adults | 274 | 8.39 | 2.36 | 0.31 |
| Nymphs | 21 | 0.00 | ||
| Larvae | 5 | 0.00 | ||
| Gender | ||||
| Male | 91 | 15.38 | 11.77 | 0.00 |
| Female | 183 | 4.92 | ||
| Amblyomma cajennense | ||||
| Male | 66 | 18.18 | 7.78 | 0.02 |
| Female | 121 | 5.79 | ||
| Nymphs | 4 | 0.00 | ||
| Dermacentor nitens | ||||
| Male | 25 | 8.00 | 1.91 | 0.38 |
| Female | 62 | 3.23 | ||
| Nymphs | 17 | 0.00 | ||
χ 2 value of chi-square test, P p value
aFisher’s exact test