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Table 3 Generalized linear model output for vector competence and parasite dynamics

From: Capacity of mosquitoes to transmit malaria depends on larval environment

  Oocyst prevalence(n = 417) Sporozoite prevalence(n = 239) Oocyst intensity(n = 316) Plasmodium genomes per midgut(n = 316)
Factors WaldX2 d.f. p - value WaldX2 d.f. p - value WaldX2 d.f. p - value WaldX2 d.f. p - value
Intercept 104.07 1 <0.001 35.91 1 <0.001 2535.06 1 <0.001 14425.51 1 <0.001
Treatment 1.93 1 0.164 0.01 1 0.944 76.61 1 <0.001 43.42 1 <0.001
Replicate(treatment) 5.57 6 0.473 9.04 6 0.171 20.79 6 0.002 2.20 6 0.900
Block 35.91 1 <0.001 12.20 1 <0.001 79.3 1 <0.001 74.68 1 <0.001
Intensity N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. 114.83 1 <0.001
Treatment x block N.S. N.S. N.S. N.S. N.S. N.S. 33.79 7 <0.001 7.18 1 <0.001
Treatment x intensity N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. 16.15 1 <0.001
Block x intensity N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. 35.96 1 <0.001
  1. Bold indicates significance at α = 0.05. (Model fit assessed by value of deviance per degrees of freedom: oocyst prevalence = 1.379, sporozoite prevalence = 1.748, oocyst intensity = 1.422, genomes per midgut = 1.286).
  2. P-values are reported only for significant interactions and first order terms. Table reflects the final output of a backwards-eliminated full factorial model. Intensity is included as a covariate only for Plasmodium genomes, as it would be an inappropriate variable for all other parasite traits reported in this table. N.S. = not significtant, N.A. = not applicable.