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dc.contributor.authorLawhavinit, O.
dc.contributor.authorHatai, K.
dc.contributor.editorLavilla-Pitogo, Celia R.
dc.contributor.editorCruz-Lacierda, Erlinda R.
dc.date.accessioned2021-10-21T03:10:50Z
dc.date.available2021-10-21T03:10:50Z
dc.date.issued2002
dc.identifier.citationLawhavinit, O., & Hatai, K. (2002). Branchiostegite melanization and microsporidia-like infection in cultured Macrobrachium rosenbergii in Thailand. In C. R. Lavilla-Pitogo & E. R. Cruz-Lacierda (Eds.), Diseases in Asian aquaculture IV: Proceedings of the Fourth Symposium on Diseases in Asian Aquaculture, 22-26 November 1999, Cebu City, Philippines (pp. 167-172). Fish Health Section, Asian Fisheries Society.en
dc.identifier.isbn9718020160
dc.identifier.urihttp://hdl.handle.net/10862/6205
dc.description.abstractIn Thailand, farming the giant freshwater prawn, Macrobrachium rosenbergii, is a viable aquaculture industry. In 1995-96, giant freshwater prawns collected from grow out ponds located in Supanburi Province, Thailand showed severe branchiostegite melanization associated with poor growth and high cumulative mortality in affected ponds. The objective this study was to report the histopathological features of branchiostegite melanization and associated lesions in affected giant freshwater prawns. The gross lesions displayed by the collected prawns were bilateral branchiostegite melanization in the medial surfaces with normal underlying gill lamellae. Histopathological examination revealed a massive number of sporonts in the gill tissue causing a hyperinfection. Enlargement of the sporonts occurred in the gills. High magnification using a light microscope revealed massive round microsporidia-like spores in the sporonts measuring 1-2 m in diameter. The muscles of collected prawns were normal showing no signs of opaque cottony or milky white coloration. The hepatopancreas, however, were yellow in color. Positive Giemsa and PAS stained spores were found in hemocytes and cytoplasm of hepatopancreas cells. Because these results do not include electron-micrographic data, more observation is needed before the spores can be identified as microsporidia.en
dc.publisherFish Health Section, Asian Fisheries Societyen
dc.subjectBranchiostegiteen
dc.subjectmelaninsen
dc.subjectMacrobrachium rosenbergiien
dc.subjectThailanden
dc.titleBranchiostegite melanization and microsporidia-like infection in cultured Macrobrachium rosenbergii in Thailanden
dc.typeConference paperen
dc.citation.spage167en
dc.citation.epage172en
dc.citation.conferenceTitleDiseases in Asian aquaculture IV: Proceedings of the Fourth Symposium on Diseases in Asian Aquaculture, 22-26 November 1999, Cebu City, Philippinesen
dc.subject.asfaprawn cultureen
dc.subject.asfalesionsen
dc.subject.asfahistopathologyen


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