Summary
Normal and virus-infected (lymphocystis disease) integument from five species of teleosts was examined by light and TEM autoradiography and SEM to establish metabolic-morphologic characteristics of integument with mature lymphocystis cells (LC's). LC's with numerous morphologic attributes of a late developmental stage showed highest incorporation of [3H]-thymidine in vivo (1–91 h) above the intracytoplasmic inclusion body (ci) with little radiolabel in nuclei, cytoplasmic icosahedral deoxyriboviruses (ICDVs) or capsule. Analysis by quantitative autoradiography revealed that the % total cell label in ci and cytoplasm did not vary appreciably from 1–91 h and was corroborative with morphologic criteria of maturity. A possible phylogenetic difference was noted between teleosts, wherein normal integument showed uptake of [3H]-thymidine in vivo (1 h) by cells at all levels of the epidermis, and cyclostomes (Spitzer et al. 1979) wherein labeling was confined to the basal third of the epidermis. Among four infected teleost species, the mean diameters of the ICDVs measured under the same conditions, ranged from 259.5 nm to 290.0 nm with the mean for each species differing significantly (p < 0.01) from each of the other means. Ruptured LC's were shown by TEM and SEM to have released ICDVs onto the lesions and integument. Various stages of LC degeneration, host response, and integumental repair processes were documented. An evaluation of labeling in vivo of the capsular matrix was compatible ([3H]-D-galactose> [3H]-L-lysine ≫ [3H]-L-fucose) with a glycosaminoglycan-protein structure.
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Spitzer, R.H., Koch, E.A., Reid, R.B. et al. Metabolic-morphologic characteristics of the integument of teleost fish with mature lymphocystis nodules. Cell Tissue Res. 222, 339–357 (1982). https://doi.org/10.1007/BF00213217
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DOI: https://doi.org/10.1007/BF00213217