The histopathology of larval anisakid nematode infections in the liver of whiting, Merlangius merlangus (L.), with some observations on blood leucocytes of the fish

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Abstract
The cellular response of whiting, Merlangius merlangus (L.), to Contracaecum and Anisakis larvae parasitic in the liver was characterized by the presence of neutrophils, macrophages and proliferating fibroblasts. A capsule formed around the larvae after the removal of all necrotic debris by phagocytic cells. Melanin granules were deposited around the capsule. Four types of blood leucocytes were identified; thrombocytes, lymphocytes, monocytes and neutrophils. Phagocytic activity of the neutrophils and macrophages was suggested by the presence of dark stained bodies within them.