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Large granular hemocytes of Mercenaria mercenaria avidly phagocytose a variety of biological particles (red blood cells of six species, yeast, and gram-positive and gram-negative bacteria) as well as polystyrene spheres. Clam hemolymph is not necessary for phagocytosis but may have some opsonic effect in certain circumstances (e.g., low temperature and low(More)
Hemocytes of the hard clam Mercenaria mercenaria migrate toward secreted bacterial products in vitro by chemotaxis (i.e., by detection of an increasing chemical gradient of attractant). The attractants produced by Escherichia coli are peptides or small proteins. Clam hemocytes also migrate toward formyl-methionyl-leucyl-phenylalanine (fMLF), a mammalian(More)
Channel catfish were inoculated intraperitoneally, intramuscularly, or intraesophageally with Yersinia ruckeri. Three antigen doses were administered by each route of injection. Four fish from each treatment were sacrificed at 5-day intervals for 40 days. Serum from each individual was tested for antibody activity against Y. ruckeri by indirect(More)
Regional myocardial blood flow (RMF) was measured simultaneously by use of labeled 8-mum microspheres and the constant-rate infusion of 3H2O in 22 open-chest dogs (Na pentobarbital anesthesia) under markedly different hemodynamic conditions. Following cardiac excision, three adjacent 80-mg tissue samples were taken from the subendocardial, mid-wall, and(More)
Stomal varices may develop in patients with gastrointestinal stomas and portal hypertension. Bleeding often is recurrent and may be fetal. A 48-year-old woman had six major stomal variceal bleeds requiring 20 U of blood in the four months before beginning stomal sclerotherapy. "Paravariceal" injections using various combinations of sodium tetradecyl(More)
Lectins in the serum of the clam Mercenaria mercenaria agglutinate some red blood cells, bacteria, and yeast. The interaction of these substances with particles is affected by sugars, ions, temperature, and alteration of particle surfaces. Lectins are not needed for phagocytosis of foreign particles in vitro. In M. mercenaria these recognition molecules do(More)