Abstract
Harris J. E. 1972. The immune response of a Cyprinid fish to infections of the acanthocephalan, Pomphorhynchus laevis. International Journal for Parasitology 2: 459–469. Chub ( Leuciscus cephalus) were found to produce precipitating antibody in response to natural and experimental infections of an acanthocephalean Pomphorhynchus laevis, although no apparent manifestation of resistance was evident The parasites matured only in the chub although they occurred in five other species of naturally infected fish. Furthermore, this was the only fish species which responded, at least by humoral antibody formation to the parasite. Preliminary experiments indicated that the helminth antigen was an excretory or secretory product and was probably produced only by mature adult worms. The antibody was detected in both the serum and intestinal mucus of the chub. The presence of antibody in the mucus of fish might suggest the presence of a secretory antibody system although the precipitins appeared to have similar chemical characteristics to IgM-type antibody.
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