Overexpression of the <i>adeB</i> Efflux Pump Gene in Tigecycline-Resistant <i>Acinetobacter baumannii</i> Clinical Isolates and Its Inhibition by (+)Usnic Acid as an Adjuvant oleh Nagaraju Bankan, Fathimunnisa Koka, Rajagopalan Vijayaraghavan, Sreekanth Reddy Basireddy, Selvaraj Jayaraman