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Table 1 The factors associated with Anaplasma phagocytophilum infection in dogs from municipalities of Itaguaí and Seropédica, Rio de Janeiro State, Brazil, as determined using multiple logistic regression

From: Molecular epidemiology of the emerging zoonosis agent Anaplasma phagocytophilum (Foggie, 1949) in dogs and ixodid ticks in Brazil

Variables related to the dogs and environment Real-time PCR Bivariate Multivariate
Dogs sampled Positives (%) χ2 P P OR CI 95%
Gender
Female 190 4.74 1.073 0.4093 - - -
Male 208 7.21      
Racial definition
Mixed Breed 285 5.26 1.042 0.4311 - - -
Defined Breed 113 7.96      
Age
< 2 years 130 3.08 3.971 0.1338 -a   
≥ 2 years 268 7.46    0.18 - 0.34-6.21
Dog size
Large 33 15.15 5.28 0.0553 0.04 2.43 1.51-12.67
Small/middle 365 5.21    -a   
History of tick infestation
Yes 332 7.23 - 0.0488b 0.01 2.86 1.98-14.87
No 66 0    -a   
Local access dog
Urban environment/yard/grazing 350 4.48 15.585 0.0003 -a   
Forest 48 18.75    0.006 3.51 1.52-16.32
Contact with other species
Yes 214 7.94 2.614 0.1599 0.15 - 0.67-10.02
No 184 3.80    -a   
Acaricide treatment
Yes 288 5.90 0.030 0.9500 - - -
No 110 6.36      
Dog’s habitat
Rural 233 6.44 0.165 0.8476 - - -
Urban 165 5.45      
Condition of environment hygiene where the dog lives
Unsatisfactory 223 8.97 6.999 0.0150 0.03 4.35 1.86-18.63
Satisfactory 165 2.42    -a   
Veterinary assistance
Yes 167 7.78 1.563 0.2999 - - -
No 231 4.76      
Tick infestation
Yes 206 7.77 2.273 0.1946 0.34 - 0.45-24.02
No 192 4.17    -a   
Presence of Amblyomma sp
Yes 82 14.63 13.493 0.0006 0.000 6.12 2.11-28.15
No 316 3.78    -a   
Presence of Rhipicephalus sanguineus sensu lato
Yes 170 5.29 0.284 0.7491 - - -
No 228 6.58      
  1. χ2 = Value of Chi-square Test, P = p value, OR = Odds Ratio, CI = Confidence Interval.
  2. aCategory reference.
  3. bG test.