ECHINODERM IMMUNOLOGY: BACTERIAL CLEARANCE BY THE SEA URCHIN STRONGYLOCENTROTUS PURPURATUS.

Publisher: University of Chicago Press Country of Publication: United States NLM ID: 2984727R Publication Model: Print Cited Medium: Internet ISSN: 1939-8697 (Electronic) Linking ISSN: 00063185 NLM ISO Abbreviation: Biol Bull Subsets: PubMed not MEDLINE

Publication: Oct. 2016- : Chicago : University of Chicago Press
Original Publication: Lancaster, Pa. [etc.]

Characteristics of bacterial clearance were investigated in the purple sea urchin, Strongylocentrotus purpuratus (Echinodermata: Echinoidea). Primary clearance kinetics were determined for three bacteria, a marine Gram negative motile rod, a marine Gram positive non-motile rod, and a Gram negative freshwater fish pathogen, Aeromonas salmonicida. Clearance kinetics differed for each of the three bacteria. Secondary clearance rates were not significantly different from primary clearance rates for any of the three bacteria, regardless of the time interval between inoculations (9-21 days), implying a probable absence of immunologic memory. During primary clearance, total coelomocyte counts declined 93% by 90 min post injection. All four coelomocyte types declined, however the relative proportions of each type changed during the six-hour sampling period. In cell-free coelomic fluid, viable counts of marine bacteria declined, with different kinetics for the two species. Viable counts in sea water controls did not change. Declines in viable counts may be due to bactericidal activity and/or agglutination, although bacterial agglutination was not observed.

Date Created: 20170404 Latest Revision: 20191120

20231215

10.2307/1541213

28368229