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Amyloidosis in Captive European Eastern Bongo (Tragelaphus Eurycerus Isaaci): Prevalence, predictive factors, organ predilection, and serum amyloid a concentrations

Rowland, Hannah; Blundell, Richard; Chantrey, Julian; Edwards, Katie L; Moss, Andrew; Stidworthy, Mark F; Gilbertson, Janet; ... Lopez, Javier; + view all (2022) Amyloidosis in Captive European Eastern Bongo (Tragelaphus Eurycerus Isaaci): Prevalence, predictive factors, organ predilection, and serum amyloid a concentrations. Journal of Zoo and Wildlife Medicine , 53 (4) pp. 696-704. 10.1638/2022-0048. Green open access

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Abstract

Amyloidosis is frequently identified during postmortem examination of captive eastern bongo (Tragelaphus eurycerus isaaci) in the European Endangered Species Programme (EEP). However, its significance and etiopathogenesis are poorly understood. The objective of this study was to investigate the prevalence of amyloidosis within this population and identify potential predictive factors for the presence of disease. Postmortem reports obtained from 24 EEP institutions were analyzed and assessed for evidence of amyloidosis. Seventy-two individuals had histopathological assessment performed after gross postmortem examination and were included in the study. Further histopathological analysis was performed on Congo red–stained slides from 26 individuals, and organ predilection sites were identified. Immunohistochemical analysis was performed in six individuals to identify the type of amyloid present. Serum amyloid A (SAA) analysis was performed on blood samples from 34 individuals, and concentrations in affected and unaffected individuals were compared. Amyloidosis was reported in 26 animals (36%). The association between the presence of amyloidosis and sex, age, or body condition was not statistically significant. However, amyloidosis was not identified in any individuals under the age of 6 yr. The presence of chronic inflammatory conditions was the only statistically significant predictive factor for the presence of amyloidosis (P = 0.03). Chronic inflammatory conditions present included nephritis, enteritis, and pneumonia. The majority of affected animals presented with amyloid deposition in multiple organs, with the liver and kidneys being most commonly affected. Immunohistochemistry confirmed the presence of AA amyloid. The association between the presence of amyloidosis and SAA values measured on a single occasion was not statistically significant. This study identified a high prevalence of amyloidosis within the captive European eastern bongo population associated with chronic inflammatory conditions. Antemortem diagnosis of amyloidosis remains challenging, and this study indicates that SAA protein concentrations are not a reliable indicator for the presence of amyloidosis.

Type: Article
Title: Amyloidosis in Captive European Eastern Bongo (Tragelaphus Eurycerus Isaaci): Prevalence, predictive factors, organ predilection, and serum amyloid a concentrations
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1638/2022-0048
Publisher version: https://doi.org/10.1638/2022-0048
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Medicine
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Medicine > Inflammation
URI: https://discovery.ucl.ac.uk/id/eprint/10179662
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