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Table 1 Entomologic indices at baseline study (1999–2000)

From: Impact of repeated ivermectin treatments against onchocerciasis on the transmission of loiasis: an entomologic evaluation in central Cameroon

Study period   No. of chrysops caught* BD TP Infection rate (%) Infective rate (%) MHL3 load
   S D S+D S D S+D S D S+D S D S+D S D S+D S D S+D
March   63 10 73 32.6 5.2 37.8 55.6 0.0 55.6 3.6 20.0 6.2 3.6 0.0 3.1 53.5 0.0 53.5
April   251 56 307 125.5 28.0 153.5 754.9 9.0 763.9 9.3 12.5 9.9 3.6 3.6 3.6 162.5 9.0 134.5
May   184 41 225 47.5 10.6 58.1 12.4 0.0 12.4 7.0 0.0 5.8 1.6 0.0 1.3 16.0 0.0 16.0
June   339 38 377 78.2 8.8 87.0 95.1 4.6 99.7 5.3 10.5 5.8 0.9 2.6 1.1 137.4 20.0 108
  Total 837 145 982 283.8 52.6 336.4 918 13.6 931.6 6.7 9.0 7.1 2.1 2.1 2.1 119.4 12.7 103.4
  p-value - - - -   0.94 - 0.89   -  
  1. *All the Chrysops were dissected except six C. silacea caught in March (2) and April (4); BD= biting densities; TP= transmission potential; MHL3= mean head L3 load; S= Chrysops silacea; D= Chrysops dimidiata; S+D= both species combined.