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2008/739 Antiviral immune responses in abalone and influence of potential abiotic and biotic factors
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2008/739 Antiviral immune responses in abalone and influence of potential abiotic and biotic factors



By Vinh Dang

Severe mortality of abalone caused by a herpesvirus (AbHV) has been reported in Australia. The manifestation of disease involves an interaction between virus, environment and abalone immunity. This research aimed to investigate the presence of antiviral activity in abalone Haliotis laevigata (greenlip), H. rubra (blacklip) and their hybrid.


A number of abalone organs were screened for anti-HSV-1 activity, but only the haemolymph (20%, v/v) and the lipophilic extract of digestive gland (3,000 μg ml-1) were found to substantially decrease the number and size of virus plaques. Sampling of wild-caught H. rubra showed a significant correlation between temperature and antiviral or antibacterial activity, with higher activity in summer than in winter months. The study showed that abalone have at least two antiviral compounds with different modes of action against viral infection. Humoral antiviral factors appear to be constitutively produced and are influenced by high temperature but not by diet or infection status.