Master Thesis in Histology Pathophysiology of cods liver worm - Does this parasite affect the health status of the Eastern Baltic cod




Greater Copenhagen area

The eastern Baltic cod are in unexpectedly poor nutritional condition and the large fish have disappeared. Besides deteriorating oxygen conditions and reduced amounts of prey for cod, infection with the parasitic cods liver worm (Contracaecum osculatum) suggestively cause this distress. As the name indicate, this parasite sit in the liver of the fish, and because the liver plays a crucial role in many vital processes, such as growth, reproduction and energy storage, heavy infections may affect the health status of the fish. 

You will use histology to investigate how the parasitic liver worm damage liver tissue, i.e. examine changes in structures and cells of the cod liver in relation to different infection intensities. In addition, specific infection sites inside the liver parenchyma will be identified.  Together, this information can be used to evaluate how liver worm may affect the function of the liver.

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DTU Aqua


Marie Plambech Ryberg




Supervisor info

MSc in Aquatic Science and Technology


Marie Plambech Ryberg


Jane Behrens, Tine Moesgaard Iburg

ECTS credits



MSc thesis

Technical University of Denmark

For almost two centuries DTU, Technical University of Denmark, has been dedicated to fulfilling the vision of H.C. Ørsted – the father of electromagnetism – who founded the university in 1829 to develop and create value using the natural sciences and the technical sciences to benefit society.

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