Natural Antibacterial and Antibiofilm Agents from Heliotropium indicum: A Strategy against Multidrug- Resistant Bacteria

The emergence of multidrug-resistant (MDR) bacteria has become a
major global health challenge due to the increasing failure of
conventional antibiotics. Medicinal plants are gaining significant
attention as alternative sources of novel antimicrobial agents.
Heliotropium indicum L., a medicinal plant belonging to the family
Boraginaceae, has been traditionally used in folk medicine for the
treatment of infections, wounds, and inflammatory diseases.
Phytochemical studies have revealed that the plant contains several
bioactive compounds including alkaloids, flavonoids, phenolic
compounds, tannins, saponins, and terpenoids. These secondary
metabolites contribute to the plant’s antimicrobial and therapeutic
properties. Several experimental studies have demonstrated that
extracts of Heliotropium indicum exhibit significant antibacterial
activity against both Gram-positive and Gram-negative bacteria such
as Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa,
and Klebsiella species. In addition to antibacterial effects, the plant
has shown potential antibiofilm activity by inhibiting bacterial
adhesion, disrupting established biofilms, and interfering with quorum sensing mechanisms. These activities are particularly
important in combating multidrug-resistant pathogens that rely on
biofilm formation for survival and persistence. The present chapter
provides an overview of the phytochemical constituents, antibacterial
mechanisms, and antibiofilm potential of Heliotropium indicum,
highlighting its potential as a promising source of novel antimicrobial
agents against multidrug-resistant bacteria.