{"id":{"repo_id":"unt","oai_identifier":"info:ark/67531/metadc2602"},"canonical_url":"https://search.dev.ndltd.org/etd/unt/info:ark/67531/metadc2602","repository":{"repo_id":"unt","name":"University of North Texas","base_url":"https://digital.library.unt.edu/oai/"},"display":{"title":"Influence of copper on resistance of Lumbricus terrestris to bacterial challenge","abstract":"Earthworms, Lumbricus terrestris, were challenged orally and intracoelomically with two bacterial species, Aeromonas hydrophila and Pseudomonas aeruginosa, and mortality rates were observed. Neither were found to be particularly pathogenic at injected doses of up to 108 bacteria per earthworm. The influence of Cu++ (as CuSO4) on the earthworm's response to bacterial challenge was investigated by exposing earthworms to sublethal levels of Cu++ prior to bacterial challenge. Exposure at sublethal concentrations up to 3 m g/cm2 did not have a pronounced influence on host resistance to challenge as measured by earthworm mortality. Cu++ increased the earthworm's ability to agglutinate rabbit erythrocytes, indicating that Cu++ exposure caused coelomocyte death, autolysis and release of agglutinins into the coelom, possibly explaining resistance to bacterial challenge.","abstract_html":"Earthworms, Lumbricus terrestris, were challenged orally and intracoelomically with two bacterial species, Aeromonas hydrophila and Pseudomonas aeruginosa, and mortality rates were observed. Neither were found to be particularly pathogenic at injected doses of up to 108 bacteria per earthworm. The influence of Cu++ (as CuSO4) on the earthworm's response to bacterial challenge was investigated by exposing earthworms to sublethal levels of Cu++ prior to bacterial challenge. Exposure at sublethal concentrations up to 3 m g/cm2 did not have a pronounced influence on host resistance to challenge as measured by earthworm mortality. Cu++ increased the earthworm's ability to agglutinate rabbit erythrocytes, indicating that Cu++ exposure caused coelomocyte death, autolysis and release of agglutinins into the coelom, possibly explaining resistance to bacterial challenge.","abstract_has_math":false,"creators":["Simmons, Carla Stull"],"institution":"University of North Texas","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Goven, Arthur J.","Shanley, Mark S.","Venables, Barney J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2000,"date_issued":"2000-08","date_published":"2000-08","updated_at":"2026-07-24T05:34:52Z","subjects":["Earthworms.","Copper.","Bacterial diseases.","Immune response.","earthworm","bacterial challenge","Cu++","coelomocyte"],"languages":["English"],"rights":["Public","Copyright","Simmons, Carla Stull","Copyright is held by the author, unless otherwise noted. All rights reserved."],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["oclc: 47442979","untcat: b2304297","https://digital.library.unt.edu/ark:/67531/metadc2602/","ark: ark:/67531/metadc2602"],"render_values":[{"text":"oclc: 47442979","href":null,"code":true},{"text":"untcat: b2304297","href":null,"code":true},{"text":"https://digital.library.unt.edu/ark:/67531/metadc2602/","href":"https://digital.library.unt.edu/ark:/67531/metadc2602/","code":true},{"text":"ark: ark:/67531/metadc2602","href":null,"code":true}]}]},"links":{"outbound_url":"https://doi.org/10.12794/metadc2602","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Goven, Arthur J.","Shanley, Mark S.","Venables, Barney J."]},{"key":"dc:creator","label":"Author","values":["Simmons, Carla Stull"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2000-08"]},{"key":"dc:publisher","label":"Institution","values":["University of North Texas"]},{"key":"dc:type","label":"Dc Type","values":["Thesis or Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Earthworms.","Copper.","Bacterial diseases.","Immune response.","earthworm","bacterial challenge","Cu++","coelomocyte"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["Public","Copyright","Simmons, Carla Stull","Copyright is held by the author, unless otherwise noted. 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Exposure at sublethal concentrations up to 3 m g/cm2 did not have a pronounced influence on host resistance to challenge as measured by earthworm mortality. Cu++ increased the earthworm's ability to agglutinate rabbit erythrocytes, indicating that Cu++ exposure caused coelomocyte death, autolysis and release of agglutinins into the coelom, possibly explaining resistance to bacterial challenge."]},{"key":"dc:format","label":"Dc Format","values":["Text"]},{"key":"dc:title","label":"Title","values":["Influence of copper on resistance of Lumbricus terrestris to bacterial challenge"]}]}],"canonical_facts":{"dc:contributor":["Goven, Arthur J.","Shanley, Mark S.","Venables, Barney J."],"dc:creator":["Simmons, Carla Stull"],"dc:date":["2000-08"],"dc:description":["Earthworms, Lumbricus terrestris, were challenged orally and intracoelomically with two bacterial species, Aeromonas hydrophila and Pseudomonas aeruginosa, and mortality rates were observed. Neither were found to be particularly pathogenic at injected doses of up to 108 bacteria per earthworm. The influence of Cu++ (as CuSO4) on the earthworm's response to bacterial challenge was investigated by exposing earthworms to sublethal levels of Cu++ prior to bacterial challenge. Exposure at sublethal concentrations up to 3 m g/cm2 did not have a pronounced influence on host resistance to challenge as measured by earthworm mortality. Cu++ increased the earthworm's ability to agglutinate rabbit erythrocytes, indicating that Cu++ exposure caused coelomocyte death, autolysis and release of agglutinins into the coelom, possibly explaining resistance to bacterial challenge."],"dc:format":["Text"],"dc:identifier":["oclc: 47442979","untcat: b2304297","doi: 10.12794/metadc2602","https://digital.library.unt.edu/ark:/67531/metadc2602/","ark: ark:/67531/metadc2602"],"dc:language":["English"],"dc:publisher":["University of North Texas"],"dc:rights":["Public","Copyright","Simmons, Carla Stull","Copyright is held by the author, unless otherwise noted. All rights reserved."],"dc:subject":["Earthworms.","Copper.","Bacterial diseases.","Immune response.","earthworm","bacterial challenge","Cu++","coelomocyte"],"dc:title":["Influence of copper on resistance of Lumbricus terrestris to bacterial challenge"],"dc:type":["Thesis or Dissertation"]},"updated_at":"2026-07-24T05:34:52Z"}