Evidence-qualified scientific claims with scope and limitations
Updated September 12, 2026
IncX1 and IncU clinical plasmids differ ~1,500-fold in conjugation frequency in biofilms, matching spatial-structure model predictions of fast edge transfer vs. slow constrained invasion — bracketing both regimes in one factorial design can identify whether the bottleneck is mating-pair formation, maintenance cost, or spatial access.
AMP resistance converges on surface-charge and membrane changes (lipid A acylation, MprF lysinylation, D-alanylation) plus sequestration and efflux — evidence includes mprF hot-spot SNPs raising daptomycin MICs (while dual SNPs collapse resistance, implying a low mutational escape ceiling) and lpxM deletion lowering polymyxin MICs 16-fold.
In vitro coculture shows Collinsella aerofaciens protects Bacteroides thetaiotaomicron from deoxycholic acid via vitamin B6/PLP exchange and DCA sequestration — but the interaction may be incidental bioaccumulation rather than evolved mutualism, and results come from a two-species system at one DCA concentration (quality rated 60%, generality 40%).
The claim that penicillin-binding protein affinity predicts the rate of Gram-positive staining loss is rated only 30% likely: PBP affinity predicts killing, but staining loss depends on LytA autolysin–driven lysis, and no direct evidence links the two — decoupling them could make Gram staining a rapid proxy for both PBP targeting and autolysin status.
Microampere wireless electrostimulation was reported to increase mycelial density on solid culture, but quality is rated 30% (n=1 dish per condition, no statistics) and the aluminum foil required for delivery is itself antifungal — a confound potentially inseparable from the measured effect.
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