particles as antimicrobial agents. In the present study, the
antibacterial efficacy of methanolic extracts of lichens
namely Parmotrema pseudotinctorum (des. Abb.) Hale and
Ramalina hossei H. Magn and G. Awasthi and silver
nanoparticles singly and the combination of silver
nanoparticles and lichen extracts was studied. The objective
of the investigation was to evaluate synergistic antibacterial
effect of lichen extracts and silver nanoparticles, if any,
against bacteria causing food poisoning.