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Table 4 Trends of rates of seropositivity of antibodies against Ehrlichia spp. (EHR) and Orientia tsutsugamushi (STG) in small mammals in northern, central, southern, and eastern Taiwan from November 2004 to December 2008

From: Prevalence of antibodies against Ehrlichia spp. and Orientia tsutsugamushi in small mammals around harbors in Taiwan

  2004 (N = 11) 2005 (N = 439) 2006 (N = 391) 2007 (N = 278) 2008 (N = 529)   (trend)
Variable N % N % N % N % N % p value p value
EHR             
 Northern 0 0 2 0.46 16 2.81 12 4.32 14 0.95 0.0054 0.8555
 Central 0 0 2 0.46 4 1.02 0 0.00 0 0.00 0.1908 0.3183
 Southern 0 0 0 0.00 3 0.77 0 0.00 1 0.19 0.0845 0.8228
 Eastern 0 0 0 0.00 0 0.00 0 0.00 0 0.00 - -
 Total 0 0 4 0.91 23 5.88 12 4.32 15 2.84 0.0003 0.3306
p value   0.127 0.115 0.00007375 0.040   
STG             
 Northern 0 0 2 0.46 6 1.02 4 0.72 11 0.95 0.9432 0.6543
 Central 0 0 6 1.37 9 2.30 0 0.00 2 0.38 0.0440 0.3680
 Southern 0 0 4 0.91 4 0.77 10 3.60 12 2.27 0.0016 0.0023
 Eastern 0 0 1 0.23 1 0.77 2 1.44 7 2.46 0.7194 0.2352
 Total 0 0 13 2.96 20 4.86 16 5.76 32 6.05 0.1183 0.0264
 p value   0.245 0.005 0.008 0.167