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By George Iwama, Teruyuki Nakanishi, William S. Hoar, David J. Randall

This booklet comprehensively reports the immunology of fish--their future health, interactions among them and their pathogens, and the impression of either endogenous and environmental alterations on those interactions. prime professionals offer a vital origin for the certainty of fish immunology and fish healthiness. As fish are more and more used as version platforms for vertebrate immune platforms, The Fish Immune procedure might be a vital reference. Key good points * the single finished, single-volume reference at the fish immune approach * Contributions from a global crew of specialists * valuable to researchers drawn to fish well-being in addition to execs dealing with fish hatcheries, aquariums, and different amenities that needs to hold fit fish

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As in other lymphoid organs, both high molecular weight (HMW) and low molecular weight (LMW) Ig-forming cells appear in the gut lamina propria of the skate Ruju kenojei (Tomonaga et aL, 1984). In chondrosteans, mainly in the paddlefish, Polyodon spathulu, which are frequently parasitized, but not in Scupirhynchus pluthorhynchus, which 1. CELLS AND TISSUES OF THE IMMUNE SYSTEM OF FISH 39 Fig. 15. Intraepithelial lymphocyte (L) of the intestine of Musfelusmanazo. Enterocytes (En), microvilli (mv).

Toruzame confirmed the occurrence of a lymphoid tissue that extended from the meninge to the ventricular lumen. The lymphoid tissue in these areas does not invade the brain parenchyma, but some macrophages migrate through the ependymal cell layer into and out of the ventricular lumen. , 1986; LloydEvans, 1993). 5-cm-long dogfish embryos, and the embryonic kidney is the first peripheral tissue to become lymphohemopoietic. 5-cm-long embryos; lymphoid cells, most of which express surface Ig (Lloyd-Evans, 1993), emerge soon after.

X3000. 2. , 1996). Apart from considerable species-specific variations in size, the histological organization of fish gut-associated lymphoid aggregates is similar in all species studied. It consists of nonencapsulated lymphoid accumulations that contain mainly lymphocytes, macrophages, and plasma cells, as well as different types of granulocytes. , 1996), but 38 AGUSTfN G . ZAPATA ET AL. Fig. 14. Spleen (Sp) of a lungfish, Lepidosiren paradoxa, closely associated with the intestinal walls (I) at the caudal part of the liver (L).

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