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. 2024 May 26;15(6):385. doi: 10.3390/insects15060385

Table 1.

Variables associated with mixed blood meal analysis among 225 engorged adult female ticks.

No. Ticks Human Blood Meal Positive (N = 76) No. Ticks Human Blood Meal Negative (N = 149) p-Value OR 95% CI
Genus
Prostriata 33 (43.4%) 75 (50.3%) - - -
Metastriate 43 (56.6%) 74 (49.7%) 0.327 1.32 0.76 to 2.31
Species
Amblyomma americanum 11 (14.5%) 29 (19.5%) 0.356 0.70 0.33 to 1.49
Dermacentor variabilis 26 (34.2%) 34 (22.8%) 0.069 1.776 0.96 to 3.23
Amblyomma maculatum 0 (0.0%) 5 (3.4%) - - -
Ixodes scapularis 25 (32.9%) 64 (43.0%) 0.146 0.65 0.37 to 1.16
Ixodes kieransi 8 (10.5%) 11 (7.4%) 0.425 1.48 0.57 to 3.84
Haemaphyalis longicornis 6 (7.9%) 6 (4.0%) 0.230 2.04 0.64 to 6.56
Calendar Month
January 22 (28.9%) 44 (29.5%) 0.928 0.78 0.53 to 1.79
February 1 (1.3%) 12 (8.1%) 0.073 0.15 0.02 to 1.19
March 18 (23.7%) 18 (12.1%) 0.027 2.26 1.10 to 4.65
May 33 (43.4%) 74 (49.7%) 0.376 0.15 0.45 to 1.36
July 2 (2.6%) 1 (0.7%) 0.261 0.97 0.36 to 44.83
Location
Region
Lowcountry 25 (32.9%) 68 (45.6%) 0.068 0.58 0.33 to 1.04
PeeDee 18 (23.7%) 22 (14.8%) 0.101 1.79 0.89 to 3.59
Midlands 2 (2.6%) 1 (0.7%) 0.261 3.99 0.36 to 44.83
Upstate 31 (40.8%) 58 (38.9%) 0.787 1.08 0.62 to 1.90
County *
Aiken 2 (2.6%) 1 (0.7%) 0.261 3.99 0.36 to 44.83
Charleston 25 (32.9%) 68 (45.6%) 0.068 0.58 0.33 to 1.04
Clarendon 0 (0.0%) 4 (2.7%) - - -
Greenville 2 (2.6%) 12 (8.1%) 0.130 0.31 0.07 to 1.41
Greenwood 22 (28.9%) 40 (26.8%) 0.739 1.11 0.60 to 2.05
Horry 18 (23.7%) 18 (12.1.%) 0.027 2.26 1.10 to 4.65
Pickens 6 (7.9%) 6 (4.0%) 0.230 2.04 0.64 to 6.56
York 1 (1.3%) 0 (0.0%) - - -
Pathogen Testing
Overall Total Positives 37 (48.7%) 68 (45.6%) 0.665 1.13 0.65 to 1.97
Panola Mountain Ehrlichia 1 (1.3%) 6 (4.0%) 0.263 0.29 0.04 to 2.51
Ehrlichia ewingii 1 (1.3%) 4 (2.7%) 0.484 0.45 0.50 to 4.19
Ehrlichia chaffeensis 3 (3.9%) 1 (0.7%) 0.127 6.00 0.60 to 59.86
Rickettsia species 36 (24.2%) 66 (44.3%) 0.692 1.59 0.16 to 15.87
Rickettsia parkeri 17 (11.4%) 31 (20.8%) 0.920 1.04 0.47 to 2.32
Rickettsia rickettsii 0 (0.0%) 0 (0.0%) - - -
Rickettsia amblyommatis 24 (31.6%) 42 (28.2%) 0.686 1.19 0.52 to 2.72
Borrelia burgdorferi 0 (0.0%) 1 (0.7%) - - -
Anaplasma phagocytophilum 1 (1.3%) 0 (0.0%) - - -
Theileria orientalis 0 (0.0%) 0 (0.0%) - - -

* Category statistically significant overall by multinominal regression.