Cerebral and cardiac congenital malformations in neonatal West Indian manatees (Trichechus manatus)

Autor(es)

Carvalho, V. L. ^[1] ; Groch, K. R. ^[2] ; Catao-Dias, J. L. ^[2] ; Meirelles, A. C. O. ^[1] ; Silva, C. P. N. ^[1] ; Monteiro, A. N. B. ^[3] ; Diaz-Delgado, J. ^[2]

Afiliação do(s) autor(es)

^[1] Assoc Pesquisa & Preservacao Ecossistemas Aquat A, Av Jose Alencar, 150 SESC, Iparana, Caucaia Ceara - Brazil

^[2] Univ Sao Paulo, Sch Vet Med & Anim Sci, Dept Pathol, Lab Wildlife Comparat Pathol, Sao Paulo - Brazil

^[3] Ctr Cananeia, Inst Pesquisa Cananeia, Rua Tristao Lobo 199, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Comparative Pathology; v. 166, p. 29-34, JAN 2019.
• Citações Web of Science: 0

Resumo

Strandings of live new-born West Indian manatees (WIMs; Trichechus manatus) are one of the main challenges for the conservation of this species in Brazil, particularly in the northeastern states. Congenital malformations (CMs) are rare in sirenians. We identified CMs in two of 19 stranded WIMs that were rescued, rehabilitated and subjected to complete pathological examinations in Ceara and Rio Grande do Norte States between 1992 and 2017. In case 1, dilation of the cerebral lateral and fourth ventricles with abundant cerebrospinal fluid (internal hydrocephalus), was diagnosed. Furthermore, this animal developed necrotizing enterocolitis associated with pneumatosis intestinalis and aspiration pneumonia late during rehabilitation. Cardiac malformations in case 2 included: right ventricle hypoplasia with marked stenosis of the tricuspid outflow, high ventricular septal defect, segmental pulmonary artery aneurysm, mitral valve haemocyst and left ventricular hypertrophy. Herein, we provide the first description of a neural tube defect, specifically a developmental internal hydrocephalus, and multiple cardiac congenital anomalies, together with their respective clinicopathological features in manatees. Although the aetiology of the CMs remains unknown in these cases, a genetic basis is plausible given the low genetic variability in this population. These cases add to the body of knowledge on health and disease aspects of manatees and may provide scientific basis for future medical and conservation efforts on neonatal WIMs. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/24932-2 - Pesquisa e caracterização da Morbilivirose em cetáceos do Brasil
• Beneficiário: Kátia Regina Groch
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/02223-8 - Imunopatologia comparativa da infecção por Morbillivirus nos cetáceos: estudos histológico, imuno-histoquímico e molecular
• Beneficiário: Josué Díaz Delgado
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/00735-6 - Pesquisa e caracterização da Morbilivirose em cetáceos do Brasil
• Beneficiário: Jose Luiz Catao Dias
• Modalidade de apoio: Auxílio à Pesquisa - Regular