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