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Table 3 Development of prevalence and intensity after one and after two rounds of treatment with 400 mg albendazole*

From: Patterns of geohelminth infection, impact of albendazole treatment and re-infection after treatment in schoolchildren from rural KwaZulu-Natal/South-Africa

  Post-Treatment 1 Re-infection 1 Post-Treatment 2 Re-infection 2a Re-infection 2b
n = 801 790 803 739 731
Time of survey May/Jun 98 Aug 98 Oct/Nov 98 Feb 99 Apr/May 99
Weeks since last treatment 3 16 3 18 29
Prevalence (%)      
   Hookworm 21.2 24.8 10.1 24.6 36.7
   A. lumbricoides 1.0 4.3 0.7 3.0 8.6
   T. trichiura 54.6 50.9 44.0 44.8 43.4
Mean intensity (EPG)      
   Hookworm 77 184 14 65 139
   A. lumbricoides 55 115 3 59 351
   T. trichiura 227 215 116 174 175
  1. * Included are all pupils who participated in both treatments (n = 864) and in the respective survey (n given in table). Calculated using both samples that were obtained in each survey. Arithmetic mean EPG for all pupils including uninfected. The two treatments were administered in April and October 1998 respectively.