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The knowledge of the immunity in annelids started with the use of earthworms as biomarkers indicating changes caused by environmental pollution. Defence strategies effectively protect earthworms against bacterial infections and parasitic invasion. A natural immunity formed by anatomical and chemical protective barriers prevents damage of the underlying(More)
The insect-parasitic rhabditoid nematodes,Steinernema feltiae andHeterorhabditis bacteriophora, released a compound/s/ toxic to larvae of the greater wax moth,Galleria mellonella, that caused paralysis and death of the insect. Larvicidal substances appeared in wax moth larvae during parasitism and after inoculation with the primary form of the bacterial(More)
The interest of marine invertebrates as food resources provides a major interest to study molluscan immunity for better understanding of the host response to pathogens. Molluscs possess a natural immunity formed by anatomical and chemical protective barriers that prevent damage of the underlying tissues, body fluid losses and the infections of pathogenic(More)
INTRODUCTION Advanced glycation end-products play an important role in diseases related to diabetes and aging processes. Model compounds are synthesized in order to prepare the diagnostic and experimental tools for studying the mechanisms of pathogenesis. The objective of the present study was to accelerate glycation and upgrade its efficiency under(More)
Based on the ability of bacterial associates of entomopathogenic nematodes to produce antibiotic compounds on artificial media, it has been commonly accepted that Xenorhabdus sp. and Photorhabdus sp. inhibit a wide range of invading microorganisms in insects infected with Steinernema spp. or Heterorhabditis spp. Therefore, the question of whether antibiotic(More)
Insect-pathogenic strains of Pseudomonas aeruginosa produce specific proteinase which selectively degrades the cecropin-based defence system of insects. This was demonstrated by the disappearance of the Galleria cecropin and purified Hyalophora cecropin B peptide PAGE bands, but not the lysozyme band, upon exposure to infected extracts and a similar(More)
Advances in biochemistry and molecular biology have made it possible to identify a number of mechanisms active in the immune phenomena of echinoderms. It is obvious that echinoderms have the ability to distinguish between different foreign objects (pathologically changed tissues, microorganisms, parasites, grafts) and to express variable effector mechanisms(More)
  • J Jarosz
  • 1993
1. Pupae of Galleria mellonella and Pieris brassicae given an injection with live, non-pathogenic Enterobacter cloacae or abiotic foreign molecules induce an acquired immunity that corresponds with the synthesis of haemolymph proteins of antibacterial activity. 2. This humoral defensive response which persists for several days, differs quantitatively(More)
Bioassays of American foulbrood larval scale filtrates have shown the presence of an immune inhibitor with a specific activity of proteases that selectively destroy cecropin-like activity in insect immune hemolymphs. It was an unexpected phenomenon to find that Bacillus larvae protease(s), even at trace concentrations, totally inhibits bactericidal activity(More)