Figure 3

Host immune responses to MRSA infection. D. melanogaster AMP gene induction at 6, 18 and 24 hour post infection was calculated by qRT-PCR as fold change of the transcriptional level in the MRSA infected flies relative to the BHI broth-injected flies: (A) Drosomycin induction; (B) Diptericin induction; (C) Cecropin A1 induction. The asterisk indicates a statistically significantly difference (p = 0.03) between M92 and other MRSA strains in inducing host Cecropin A1 expression at 18 hours post infection (Student’s t-test).