正常与感染内脏白点病大黄鱼的血细胞比较研究

doi:10.16378/j.cnki.1003-1111.25057

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Abstract In order to investigate the structural changes of the blood cells of large yellow croaker Larimichthys crocea infected with visceral white spot disease, the blood cells of normal and diseased large yellow croaker weighing (34.13±0.34) g with visceral white spot disease were comparatively investigated for individual size and leukocyte sorting ratio under microscopic and ultramicroscopic observation. The results showed that there were five types of blood cells including erythrocytes, neutrophils, lymphocytes, thrombocytes, and monocytes in large yellow croaker. The erythrocytes of large yellow croaker infected with visceral white spot disease were structurally characterized by disintegration of the nucleus, cleavage of the nucleolus into microsomes, or deep staining of the nucleus, deformation of the nuclear membrane, folds and cristae, and condensed, deep staining of the cytoplasm, with the morphology of a pike shape or an irregular type. There were significantly smaller neutrophils, lymphocytes and thrombocytes in the infected fish than those in the normal group (P<0.05), with the significantly larger ratio of the long diameter to the short diameter of erythrocytes, lymphocytes and thrombocytes than those in the normal group (P<0.05). The proportions of lymphocytes (15.67±1.27)% and thrombocytes (19.75±1.02)% were shown to be significantly reduced (P<0.05) in the fish infected with visceral white spot disease, while the proportions of neutrophils (13.86±3.12)% and monocytes (30.70±1.38)% were significantly increased (P<0.05) compared with the normal group. The findings provide theoretical basis for the diagnosis and prevention of visceral white spot disease.

Key words： Larimichthys crocea visceral white spot disease blood cell morphology

Received: 07 March 2025

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S948

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	HUANG Weiqing
	LI Tingting
	WU Xiaoxuan
	DING Jianfa

Cite this article:

HUANG Weiqing,LI Tingting,WU Xiaoxuan, et al. Comparison of Blood Cells in Normal and Diseased Large Yellow Croaker Larimichthys crocea with Visceral White Spot Disease[J]. Fisheries Science, 2026, 45(2): 314-320.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.25057 OR https://www.shchkx.com/EN/Y2026/V45/I2/314

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