The present review focus on the antiviral and antibacterial potential of seaweeds associated organisms. A large number of seaweeds and associated microorganism extracts and/or extracellular products have been found to have antibacterial activity, the antibacterial activity of aquatic microalgae was reported for Chlorella vulgaris. The antiviral effects of polysaccharides from marine algae toward mumps virus and influenza B virus were reported . Subsequently, polysaccharides fractions from extracts of red algae were found to inhibit herpes simplex virus (HSV) and other viruses. Compounds extracted from algae have in vitro or in vivo activity against a wide range of retroviruses, including herpes viruses (HSV-1, HSV-2, HCMV), togaviruses (Sindbis virus, Semliki Forest virus), paramyxoviruses (RSV), rhabdoviruses (vesicular stomatitis virus [VSV]), and human immune deficiency viruses (SIV, HIV) and also to on antimicrobial, antiprotozoal activity. Parasitic protozoans are single-celled organisms causing serious tropical diseases worldwide in both humans and animals. Malaria, trypanosomiasis and leishmaniasis are among the major parasitic diseases, seaweeds and associated microorganisms showed promising biopotential against them.
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