NTRK1 and infection: Ktr/Trk systems are key players for the homeostasis of bacterial cell physiology, encasing osmotic resistance, cellular fitness during host infection (Alkhuder et al., 2010; Stingl et al., 2007) and antimicrobial resistance (Diskowski et al., 2015; Gries et al., 2013; Su et al., 2009).