Fig 2. The number of differentially expressed genes in naïve worker offspring of mother queens that were injected with heat killed Gram-positive bacterium (Arthrobacter globiformis) (trans-generational immunity treatment; AN), and worker offspring from naïve mother queens but themselves exposed to an immune stimulus of A. globiformis (induced immune response condition; NA).

The expression of these genes is measured relative to that of naïve worker offspring of naïve mothers (NN).