Lysozymelike activity in the hemolymph of Biomphalaria glabrata challenged with bacteria

Thomas C. Cheng, Michael J. Chorney, Timothy P. Yoshino

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50 Scopus citations


Levels of lysozyme activity have been determined in the serum and cells of untreated Biomphalaria glabrata and in snails that had been challenged with heat-killed Bacillus megaterium and water at 1, 2, and 4 hr postinjection. Lysozyme activities have also been ascertained in sham-injected snails at 1, 2, and 4 hr postchallenge. Our results indicate significant alterations in the serum lysozyme activity levels at 2 and 4 hr postchallenge with bacteria and at 1 hr postinjection of water. Also, there is a significant increase in cell lysozyme activity at 1 hr postchallenge with B. megaterium. It is concluded that lysozyme is released from phagocytes into serum as a result of challenge with B. megaterium. Although the exact role of the released enzyme is uncertain, it is hypothesized that it may serve as a humoral defense molecule.

Original languageEnglish (US)
Pages (from-to)170-174
Number of pages5
JournalJournal of invertebrate pathology
Issue number2
StatePublished - Mar 1977

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics


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