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Table 4 Percentage reduction in M. perstans prevalence and intensity in selected communities of Mamfe and Nwa surveyed before and under CDTI MDA

From: Update on the distribution of Mansonella perstans in the southern part of Cameroon: influence of ecological factors and mass drug administration with ivermectin

Regions Bioecological zones Health district Prevalence (%)    Geometric mean  
Before IVM MDA Under IVM MDA % reduction χ 2 P-value Before IVM MDA Under IVM MDA % reduction P-value
South west DERF Mamfe 64.60 49.73 23.02 0.7529 0.335 2,957.8 1,934.8 34.58 < 0.0001
DHERF 59.40 71.97 -21.16 10.6411 0.001 5,800.9 5,743.6 0.99 < 0.0001
North west FS Nwa 0.20 0.50 -150.00 0.0331 0.281 13.90 175.8 -1164.74 < 0.0001
  1. Abbreviations: DERF deciduous equatorial rainforest, DHERF dense humid equatorial rainforest, FS forested savanna, IVM MDA ivermectin mass drug administration (χ 2 test was used to compare prevalence rates before and under treatment; t-test was used to compare mean intensity of infection before and under treatment)