Aqueous extracts (AE) of chyrocline flaccida exhibit true antiviral activity in vitro against different members of the Herpesvirus family (herpes simplex virus type 1 and 2, human cytomegalovirus, bovine herpesvirus and lower activity with pseudorabies virus). The extract had no activity against some RNA (naked and enveloped) viruses and adenoviruses. The extract was not virucidal but its antiviral index (AI) was sufficiently high to justify further analysis. A preliminary characterization indicates that an early step of viral replication was affected by the aqueous extract.
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García et al. (1995) studied this question.
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