By George Iwama, Teruyuki Nakanishi, William S. Hoar, David J. Randall
This e-book comprehensively reports the immunology of fish--their health and wellbeing, interactions among them and their pathogens, and the effect of either endogenous and environmental adjustments on those interactions. major professionals supply a necessary 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 method might be a vital reference. Key good points * the one entire, single-volume reference at the fish immune approach * Contributions from a world workforce of specialists * priceless to researchers drawn to fish overall healthiness in addition to pros handling fish hatcheries, aquariums, and different amenities that needs to preserve fit fish
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Example text
1992; Zapata, 1996). , 1994). , 1994). Little information is available on thymic vascularization in fish. Chilmonczyk (1992) reported that thymic vascularization in teleosts seems to be derived from the gill vascular system and, therefore, should be solely 30 AGUSTfN G . ZAPATA ET AL. of arterial origin. Accordingly, blood supply to the trout thymus is achieved by the thymic artery, a branch of the segmental artery coming from the second and third afferent branchial arteries. After entering the cephalic part of the organ, the artery splits repeatedly to form a dense capillary network throughout the entire organ.
ZAPATA ET A L . In general terms, its histological organization resembles that of elasmobranch spleen (Fange, 1984; Fange and Nilsson, 1985;Mattisson, pers. ). Lymphoid foci constitute the white pulp, and mature and developing erythroid cells and thrombocytes occupy the red pulp. In addition, large ellipsoids appear as pale structures throughout the splenic parenchyma. In selachians, the spleen is an elongated, lobed organ close to the duodenum. In rays and skates, in contrast, it appears as a round, compact, only slightly lobed mass.
Apart from the thymus and the spleen, the lymphoid organs of Dipnoi include a granulopoietic tissue that develops within the spiral intestine and a similar tissue covering the kidney and the Fig. 8. Lymphoid tissue of the olfactory sac of the bichir, Polypterus senegalus. Different sized lymphocytes (L), lymphoblasts (Lb), and large melanomacrophages (MMs) occupy the rnucosa arranged between the components of the connective tissue (arrows). X5000. 22 AGUSTiN G. ZAPATA ET AL. , 1966). The tissue contains a large amount of pigment, presumably melanomacrophages, and abundant eosinophils and lymphocytes.
