Antiviral Agents/pharmacology; Cytomegalovirus/drug effects; Deoxy Sugars/pharmacology; HIV-1/drug effects; Herpesvirus 1, Human/drug effects; Mannans/pharmacology; Seaweed; Animals; Anti-HIV Agents/chemistry; Anti-HIV Agents/isolation & purification; Anti-HIV Agents/pharmacology; Antiviral Agents/chemistry; Antiviral Agents/isolation & purification; Cell Line; Cell Wall/chemistry; Chlorocebus aethiops; Cytomegalovirus/physiology; Deoxy Sugars/chemistry; Deoxy Sugars/isolation & purification; Drug Synergism; HIV-1/physiology; Herpesvirus 1, Human/physiology; Humans; Mannans/chemistry; Mannans/isolation & purification; Vero Cells; Virus Replication/drug effects; Zidovudine/pharmacology