Abstract
In recent years the presence of lysozymelike activities in the hemolymph of invertebrates has been documented with increasing frequency. Mohrig and Messner (1968) report the occurrence of lysozyme at a level of 25–500 µg/ml in the hemolymph of normal Gallaria mellonella. This level can, however, be elevated nonspecifically up to a maximum of 9000 µg/ml of hemolymph within 24 hr by injections of sterile Ringer solution, India ink, and Gram-positive bacteria. Jolles and Zuili (1960) discovered a bacterial lytic factor in the marine polychaete worm, Nephthys hombergi, which Perin and Jolles (1972) characterize as lysozome. Schubert and Messner (1971) have also observed lysozymelike activities in nine species of marine, fresh-water, and terrestrial annelids: Arenicola marina, Nereis diversicolor, Tubifex sp., Enchytraeus sp., Allolobophora caligi- nosa, Hirudo medicinalis, Haemopis sanguisuga, Herpobdella octoculata, and Glossiphonia complanta. However, they do not observe heightened levels of lysozyme in these annelids after injection of various bacteria.
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