This chapter is an updated review of the literature published since 1980s
about compounds with antiviral properties isolated from red seaweed (Rhodophyta). It
integrates findings from molecular, experimental and cellular researches to show an
overview of potential antiviral agents derived from Rhodophyta and their promising
application in viral therapy. Extracts of and/or compounds isolated from red seaweed,
mainly polysaccharides, play a protective role against different viruses such as human
immunodeficiency virus, herpes simplex virus, influenza virus, cytomegalovirus, and
others. The main target of the antiviral action of these algal compounds is the initial
binding of pathogens to the host cells.
Keywords: Agars, antiviral activity, carrageenans, extracts, galactans, mannans,
marine, natural, polysaccharides, rhodophyta, viruses.
