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Table 3 Blood feeding behavior of West Nile virus susceptible (S), resistant (R), or unexposed (UNEXP) Cx. pipiens following feeding on WNV WT, WNV MP20, or non-infectious bloodmeal

From: The evolution of virulence of West Nile virus in a mosquito vector: implications for arbovirus adaptation and evolution

  UNEXP WT S WT R MP20 S MP20 R
overall rate1 0.29 0.39 0.29 0.37 0.24
wk. 1 rate2 0.20 0.46a 0.32 0.63a 0.43
wks. 2–6 rate3 0.41 0.31 0.28 0.23 0.10b
mean wk. rate4 0.23 0.32 0.27 0.28 0.15
w/o bm5 0.58 0.41c 0.42c 0.61 0.58
bm/female6 0.66 0.87 0.77 0.59 0.41
engorge7 2.61 2.27 2.46 2.08 2.29
  1. 1proportion feeding throughout the study (total fed/total offered).
  2. 2proportion feeding at 7 days post infection.
  3. 3combined proportion feeding in weeks 2–6 of the study.
  4. 4 mean weekly feeding rates.
  5. 5 proportion of females not taking a bloodmeal throughout the study.
  6. 6 mean number of bloodmeals imbibed by individual mosquitoes.
  7. 7 mean level of engorgement (1–4).
  8. a significantly higher than unexposed (Chi-squared, p<0.05).
  9. b significantly lower than unexposed (Chi-squared, p<0.05).
  10. c significantly lower than all other groups (Chi-squared, p<0.05).