Pathogen Variables Prevalence 95% CI p-value   Odds Ratio Lower Upper B. burgdorferi s.l. BCS 0.90 0.39 2.08 0.80   Goat/Sheep 0.56 0.20 1.55 0.27   Horse 1.99 0.47 8.38 0.35   Male 0.48 0.14 1.63 0.24   Castrated male 1.92 0.73 5.05 0.18   Elevation: 1110-1340 meters 0.02 0.01 0.08 <0.001 Anaplasma BCS 241.20 8.25 7049.00 0.00 phagocytophilum Male 0.61 0.34 1.11 0.11   Castrated male 2.38 1.01 5.60 0.05   Goat/Sheep 0.94 0.50 1.80 0.86   Horse 3.45 0.77 15.39 0.10   Elevation 1.01 1.01 1.02 < 0.001 SFG rickettsiae Goat/Sheep 4.22 1.56 11.40 <0.005   Horse 42.34 7.31 245.00 <0.001   Male 1.19 0.68 2.10 0.55   Castrated male 0.48 0.10 2.32 0.36   BCS 1.17 0.68 2.00 0.58   Elevation: SquareRoot 0.69 0.59 0.81 <0.001 Anaplasma ovis BCS 0.13 0.01 2.55 0.18 Elevation 1.00 0.99 1.01 0.60   Goat/Sheep 1883.00 4.01 884200.00 0.02   BCS × Elevation 1.00 1.00 1.00 0.28   Goat/Sheep * Elevation 1.00 0.99 1.00 0.05   Male 0.87 0.41 1.83 0.71   Castrated male 0.24 0.11 0.56 <0.001 BCS: body condition score; Goat/Sheep: indicates goat and sheep combined into one category

Table 5: Summary of logistic regression final models for each of four tick-borne pathogens, B.burgdorferi s.l., A. phagocyophilum and Rickettsia spp., with seroprevalence as outcome, and A.ovis infection as outcome, from four livestock species (n=436) sampled in five sites within two aimags in Mongolia in 2007 and 2008. Outcomes were positive or negative based on laboratory analyses. Reference categories are as follows: BCS: <2; Species: cattle; Gender: female.