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Do Antibiotic Compounds Produced in Vitro By Xenorhabdus Nematophilus Minimize the Secondary Invasion of Insect Carcasses By Contaminating Bacteria?

Do Antibiotic Compounds Produced in Vitro By Xenorhabdus Nematophilus Minimize the Secondary... DO ANTIBIOTIC COMPOUNDS PRODUCED IN VITRO BY XENORHABDUS NEMATOPHILUS MINIMIZE THE SECONDARY INVASION OF INSECT CARCASSES BY CONTAMINATING BACTERIA? BY J. JAROSZ Department of Insect Pathology, Institute of Biology, Marie Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland Larvae of the greater wax moth (Galleria mellonella) infected with the rhabditid Steinernema carpocapsae do not putrefy in the life cycle of the nematode, and it has been commonly suggested that Xenorhabdus nematophilus prevents putrefaction of the insect cadaver by the production of antibiotic compounds that inhibit the secondary invasion by proteolytic bacteria. The evidence that inhibiting substances are not present in all developmental stages of the parasite and an extremely low antibiotic potency of a narrow spectrum of antibacterial activity found in Galleria parasitized with S. carpocapsae do not support these speculations. Some other competition mechanisms must be active in infected larvae since the resistance of insect carcass to decay cannot be explained simply by antibiotic inhibition of contaminating bacterial microflora. The lack of putrefaction could rather result from little or no competition for the infecting Xenorhabdus that by a rapid colonization of insect body and overgrowth prevents secondary invasion of the insect carcass. It is postulated that in the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

Do Antibiotic Compounds Produced in Vitro By Xenorhabdus Nematophilus Minimize the Secondary Invasion of Insect Carcasses By Contaminating Bacteria?

Nematologica , Volume 42 (3): 11 – Jan 1, 1996

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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/004425996X00092
Publisher site
See Article on Publisher Site

Abstract

DO ANTIBIOTIC COMPOUNDS PRODUCED IN VITRO BY XENORHABDUS NEMATOPHILUS MINIMIZE THE SECONDARY INVASION OF INSECT CARCASSES BY CONTAMINATING BACTERIA? BY J. JAROSZ Department of Insect Pathology, Institute of Biology, Marie Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland Larvae of the greater wax moth (Galleria mellonella) infected with the rhabditid Steinernema carpocapsae do not putrefy in the life cycle of the nematode, and it has been commonly suggested that Xenorhabdus nematophilus prevents putrefaction of the insect cadaver by the production of antibiotic compounds that inhibit the secondary invasion by proteolytic bacteria. The evidence that inhibiting substances are not present in all developmental stages of the parasite and an extremely low antibiotic potency of a narrow spectrum of antibacterial activity found in Galleria parasitized with S. carpocapsae do not support these speculations. Some other competition mechanisms must be active in infected larvae since the resistance of insect carcass to decay cannot be explained simply by antibiotic inhibition of contaminating bacterial microflora. The lack of putrefaction could rather result from little or no competition for the infecting Xenorhabdus that by a rapid colonization of insect body and overgrowth prevents secondary invasion of the insect carcass. It is postulated that in the

Journal

NematologicaBrill

Published: Jan 1, 1996

Keywords: secondary invasion; Steinernema carpocapsae; antibiotic compounds; Xenorhabdus nematophilus; competition mechanism

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