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Table 4 Presence of T. cruzi in the digestive tracts of the triatomine species found in Caracas

From: Panstrongylus geniculatus and four other species of triatomine bug involved in the Trypanosoma cruzi enzootic cycle: high risk factors for Chagas’ disease transmission in the Metropolitan District of Caracas, Venezuela

   2007 2008 2009 2010 2011 2012 2013 Sub-total
Species Sex/Stage Neg Pos Neg Pos Neg Pos Neg Pos Neg Pos Neg Pos Neg Pos Neg Pos
P.s geniculatus Female 20 22 84 134 73 173 77 379 24 187 26 130 29 135 333 1160
  Male 14 11 61 103 71 115 122 368 13 122 23 75 10 80 314 874
  NIII 0 1 1 1 0 6 2 4 1 0 2 1 0 0 6 13
  NIV 0 5 5 2 6 7 2 8 1 0 4 4 3 7 21 33
  NV 0 1 0 1 3 3 2 3 1 2 1 2 0 0 7 12
  Sub-total 34 40 151 241 153 304 205 762 40 311 56 212 42 222 681 2092
T. maculata Female 0 0 0 0 1 0 1 2 0 1 0 1 1 0 3 4
  Male 0 0 1 0 0 0 0 0 1 1 0 1 0 0 2 2
  Sub-total 0 0 1 0 1 0 1 2 1 2 0 2 1 0 5 6
T. nigromaculata Female 0 0 0 1 1 2 2 2 0 0 1 0 0 0 4 5
  Male 0 0 0 0 0 0 2 3 1 0 0 0 0 0 3 3
  Sub-total 0 0 0 1 1 2 4 5 1 0 1 0 0 0 7 8
R. prolixus Male 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 1
  Sub-total 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 1
Total number of triatomines   34 40 152 242 156 307 210 769 42 313 57 214 43 222 694 2107
  1. Neg = No parasites observed under microscope examination.
  2. Pos = T. cruzi observed under microscope examination.