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. 2016 Aug 30;7:1344. doi: 10.3389/fmicb.2016.01344

Table 6.

Effects of Usnic acid and four natural extracts on selected virulence-related promoters.

Genus species Extract spa srtA psm hla cap8 pvl clfA fnbB
Usnea subfloridana L125 −− −− −− −−− −−
Usnea subfloridana L314 +++ + −− −− ++ −− −− /
Usnea filipendula AE63 +++ −− −− ++ −−− −− +
Usnea rigida AE66A ++ −− −− + −−− −−
Compound Usnic acid +++ + + −− −− /
Control DMSO / / / / / / / /

+, induction effect; −, repression effect; /, no effect.