FIG. 5.

Influence of pathogen species on mRNA abundance. (A) Relative copy numbers, as measured in samples infected with S. aureus (filled bars; n = 8), a spectrum of streptococcal and coryneform bacteria (hatched bars; n = 13), and those containing E. coli (white bars; n = 4, two of these had E. coli as the sole pathogen, and the others contained A. pyogenes as a second pathogen). (B) Magnitude of increased copy numbers in severely infected samples, expressed as multiples from the levels found in uninfected quarters (grouping of values is as in panel A) *, P < 0.05; **, P < 0.001.