The data file (in .csv format) contains 6 columns. The first column indicates which needle was used to inject symbionts (included as a random effect in the model). The second column indicates the genotype of the injected aphid (also included as a random effect). The third column shows which symbiont species (Regiella or Serratia) was injected into each aphid, and the fourth column gives the biotype of each aphid. The 5th column is the binary response variable that indicates whether an injected aphid's 10th offspring had a positive symbiont infection (as determined by PCR amplification). The 6th column is also a binary response variable indicating PCR amplification of the 10th offspring of a subset of aphids 3 generations after injection