Evidence of Hearing Loss and Unrelated Toxoplasmosis in a Free-Ranging Harbour Porpoise ( Phocoena phocoena )
Evidence of hearing impairment was identified in a harbour porpoise ( Phocoena phocoena ) on the basis of scanning electron microscopy. In addition, based on histopathology and immunohistochemistry, there were signs of unrelated cerebral toxoplasmosis. The six-year old individual live stranded on th...
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ftdoajarticles:oai:doaj.org/article:759c3675b9fa42d98752ff5fef6c4f98 2024-01-07T09:43:45+01:00 Evidence of Hearing Loss and Unrelated Toxoplasmosis in a Free-Ranging Harbour Porpoise ( Phocoena phocoena ) Maria Morell Lonneke L. IJsseldijk Alinda J. Berends Andrea Gröne Ursula Siebert Stephen A. Raverty Robert E. Shadwick Marja J. L. Kik 2021-10-01T00:00:00Z https://doi.org/10.3390/ani11113058 https://doaj.org/article/759c3675b9fa42d98752ff5fef6c4f98 EN eng MDPI AG https://www.mdpi.com/2076-2615/11/11/3058 https://doaj.org/toc/2076-2615 doi:10.3390/ani11113058 2076-2615 https://doaj.org/article/759c3675b9fa42d98752ff5fef6c4f98 Animals, Vol 11, Iss 11, p 3058 (2021) Toxoplasma gondii North Sea live stranding post-mortem examination encephalitis noise-induced hearing loss Veterinary medicine SF600-1100 Zoology QL1-991 article 2021 ftdoajarticles https://doi.org/10.3390/ani11113058 2023-12-10T01:45:23Z Evidence of hearing impairment was identified in a harbour porpoise ( Phocoena phocoena ) on the basis of scanning electron microscopy. In addition, based on histopathology and immunohistochemistry, there were signs of unrelated cerebral toxoplasmosis. The six-year old individual live stranded on the Dutch coast at Domburg in 2016 and died a few hours later. The most significant gross lesion was multifocal necrosis and haemorrhage of the cerebrum. Histopathology of the brain revealed extensive necrosis and haemorrhage in the cerebrum with multifocal accumulations of degenerated neutrophils, lymphocytes and macrophages, and perivascular lymphocytic cuffing. The diagnosis of cerebral toxoplasmosis was confirmed by positive staining of protozoa with anti- Toxoplasma gondii antibodies. Tachyzoites were not observed histologically in any of the examined tissues. Ultrastructural evaluation of the inner ear revealed evidence of scattered loss of outer hair cells in a 290 µm long segment of the apical turn of the cochlea, and in a focal region of ~ 1.5 mm from the apex of the cochlea, which was compatible with noise-induced hearing loss. This is the first case of concurrent presumptive noise-induced hearing loss and toxoplasmosis in a free-ranging harbour porpoise from the North Sea. Article in Journal/Newspaper Harbour porpoise Phocoena phocoena Directory of Open Access Journals: DOAJ Articles Animals 11 11 3058 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Toxoplasma gondii North Sea live stranding post-mortem examination encephalitis noise-induced hearing loss Veterinary medicine SF600-1100 Zoology QL1-991 |
spellingShingle |
Toxoplasma gondii North Sea live stranding post-mortem examination encephalitis noise-induced hearing loss Veterinary medicine SF600-1100 Zoology QL1-991 Maria Morell Lonneke L. IJsseldijk Alinda J. Berends Andrea Gröne Ursula Siebert Stephen A. Raverty Robert E. Shadwick Marja J. L. Kik Evidence of Hearing Loss and Unrelated Toxoplasmosis in a Free-Ranging Harbour Porpoise ( Phocoena phocoena ) |
topic_facet |
Toxoplasma gondii North Sea live stranding post-mortem examination encephalitis noise-induced hearing loss Veterinary medicine SF600-1100 Zoology QL1-991 |
description |
Evidence of hearing impairment was identified in a harbour porpoise ( Phocoena phocoena ) on the basis of scanning electron microscopy. In addition, based on histopathology and immunohistochemistry, there were signs of unrelated cerebral toxoplasmosis. The six-year old individual live stranded on the Dutch coast at Domburg in 2016 and died a few hours later. The most significant gross lesion was multifocal necrosis and haemorrhage of the cerebrum. Histopathology of the brain revealed extensive necrosis and haemorrhage in the cerebrum with multifocal accumulations of degenerated neutrophils, lymphocytes and macrophages, and perivascular lymphocytic cuffing. The diagnosis of cerebral toxoplasmosis was confirmed by positive staining of protozoa with anti- Toxoplasma gondii antibodies. Tachyzoites were not observed histologically in any of the examined tissues. Ultrastructural evaluation of the inner ear revealed evidence of scattered loss of outer hair cells in a 290 µm long segment of the apical turn of the cochlea, and in a focal region of ~ 1.5 mm from the apex of the cochlea, which was compatible with noise-induced hearing loss. This is the first case of concurrent presumptive noise-induced hearing loss and toxoplasmosis in a free-ranging harbour porpoise from the North Sea. |
format |
Article in Journal/Newspaper |
author |
Maria Morell Lonneke L. IJsseldijk Alinda J. Berends Andrea Gröne Ursula Siebert Stephen A. Raverty Robert E. Shadwick Marja J. L. Kik |
author_facet |
Maria Morell Lonneke L. IJsseldijk Alinda J. Berends Andrea Gröne Ursula Siebert Stephen A. Raverty Robert E. Shadwick Marja J. L. Kik |
author_sort |
Maria Morell |
title |
Evidence of Hearing Loss and Unrelated Toxoplasmosis in a Free-Ranging Harbour Porpoise ( Phocoena phocoena ) |
title_short |
Evidence of Hearing Loss and Unrelated Toxoplasmosis in a Free-Ranging Harbour Porpoise ( Phocoena phocoena ) |
title_full |
Evidence of Hearing Loss and Unrelated Toxoplasmosis in a Free-Ranging Harbour Porpoise ( Phocoena phocoena ) |
title_fullStr |
Evidence of Hearing Loss and Unrelated Toxoplasmosis in a Free-Ranging Harbour Porpoise ( Phocoena phocoena ) |
title_full_unstemmed |
Evidence of Hearing Loss and Unrelated Toxoplasmosis in a Free-Ranging Harbour Porpoise ( Phocoena phocoena ) |
title_sort |
evidence of hearing loss and unrelated toxoplasmosis in a free-ranging harbour porpoise ( phocoena phocoena ) |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/ani11113058 https://doaj.org/article/759c3675b9fa42d98752ff5fef6c4f98 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
Animals, Vol 11, Iss 11, p 3058 (2021) |
op_relation |
https://www.mdpi.com/2076-2615/11/11/3058 https://doaj.org/toc/2076-2615 doi:10.3390/ani11113058 2076-2615 https://doaj.org/article/759c3675b9fa42d98752ff5fef6c4f98 |
op_doi |
https://doi.org/10.3390/ani11113058 |
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Animals |
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11 |
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11 |
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3058 |
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