Greater than 99% of Vibrio alginolyticus were cleared from the haemolymph of Penaeus monodon within 4 h of exposure to the heat-killed bacteria. Bactericidins and other humoral factors (possibly lectins) appear to be induced within 1 day post-treatment. The appearance of ‘lectins’ was short-lived and only detected in bacteria-treated shrimps. Bactericidins, however, peaked at day 2 and persisted in the haemolymph until day 5. They showed partial specificity. In addition, bactericidins were briefly induced at day 2 in control shrimps which had been injected with saline. Haemagglutinins active against sheep red blood cells were detected at a variety of titres in all groups of shrimps.
These results are discussed with reference to the responses of other crustacea and of insects to exposure to bacteria.
Adams, A. Response of penaeid shrimp to exposure to Vibrio species. Fish and Shellfish Immunology (1991) 1 (1) 59-70. [DOI: 10.1016/S1050-4648(06)80020-3]