Characterization of brown spot disease of gulf coast shrimp.

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dc.acquisition-srcen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorCipriani, G.R.en_US
dc.contributor.authorWheeler, R.S.en_US
dc.contributor.authorSizemore, R.K.en_US
dc.contributor.otherJournal of Invertebrate Pathology.en_US
dc.date.accessioned2010-02-15T16:52:41Z
dc.date.available2010-02-15T16:52:41Z
dc.date.issued1980en_US
dc.degreeen_US
dc.descriptionp. 255-263.en_US
dc.description-otheren_US
dc.description.abstractAdult penaeid shrimp [Penaeus aztecus and Penaeus setiferus] were collected from mariculture raceways, holding tanks and near-shore waters of Galveston Island, Texas [USA]. Those with darkly pigmented lesions were chosen for study. When observed by scanning electron microscopy, diseased cuticle shows dense populations of bacteria within a lesion; normal cuticle shows a relatively low number of bacteria. Some lesions exhibited a morphologically homogeneous population of bacteria; others revealed a heterogeneous or mixed infection. Bacteriological analysis of a homogenate of each lesion revealed the presence of a wide variety of organisms of which produce extracellular lipases, proteases, and chitinases. Lipolytic and proteolytic organisms were consistently isolated from all 20 lesions examined; chitinoclastic bacteria were found in all but 2 lesions. According to the presumptive isolation scheme used, 10 distict phenotypes of bacteria were differentiated among the isolates for 20 lesions. These phenotypes were classified into 4 genera: Vibrio, Alteromonas, Spirillum and Flavobacterium. Groups of 10 shrimp were abraded and inoculated with representative isolates form of each of the 10 phenotypes. Isolates (4) were able to initiate lesion formation. These were 2 Vibrio spp., an Alteromanas sp., and 1 Spirillum sp. All of the pathogens were lipolytic; only 2 were chinoclastic. There probably is not 1 specific chitinoclastic bacterium which causes brown spot symptoms; a variety of bacteria acting alone or in groups may be the causal agents.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeGalveston Islanden_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/19590
dc.latitudeen_US
dc.locationTAMUG periodical collectionen_US
dc.longitudeen_US
dc.notesen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries1834.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectpenaeid shrimpen_US
dc.subjectPenaeus aztecusen_US
dc.subjectPenaeus setiferusen_US
dc.subjectbrown shrimpen_US
dc.subjectwhite shrimpen_US
dc.subjectanimal diseasesen_US
dc.subjectdiseasesen_US
dc.titleCharacterization of brown spot disease of gulf coast shrimp.en_US
dc.typeArticleen_US
dc.universityen_US
dc.vol-issue36(2)en_US

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