a) Growth curves of S. aureus Newman and its isogenic transposon
mutant strain fphB:: ϕNΣ and Newman WT in TSB
with or without 1 μM JCP251, as indicated. Graph shows means of three
(WT) or two biologically independent cultures (WT +JCP251,
fphB:: ϕNΣ). b) Plots of total CFU
recovered from indicated organs of BALB/c mice 96 hours after intravenous
infection with S. aureus Newman WT or fphB::
ϕNΣ. Graphs show pooled data (median ± interquartile
range, WT: n=20, fphB:: ϕNΣ.
n=20) from 4 independent experiments. Significance was tested by
unpaired, two-tailed Mann-Whitney test. c–e) Plots of total CFU
recovered from indicated organs of BALB/c mice 96 hours after systemic infection
with S. aureus Newman WT and fphB::
ϕNΣ that were pretreated with JCP251 or vehicle for 60 min.
Graph shows pooled data (median ± interquartile range, sample size of
different groups is indicated in the graph) from 2 independent experiments.
Kruskal-Wallis test of analysis of variance among each of these datasets
revealed that only in the liver median CFU values vary significantly (liver:
p=0.0058, heart: p=0.1530, kidneys p=0.0956). Pairwise
significance testing within the liver dataset (as indicated in c) was done by
unpaired, two-tailed Mann-Whitney test.