Pathological changes by Hapalotrema postorchis Rao 1976 (Digenea: Spirorchiidae) in a green turtle Chelonia mydas Linnaeus 1758 (Testudines, Cheloniidae) from Brazil

Werneck, Max Rondon; Souza, G. B.; Berger, Bruno; Trazzi, Alessandro; Ribeiro, Rachel Bittencourt; Silva, M. A.; Jerdy, Hassan; Carvalho, Eulógio Carlos Queiróz de

doi:10.1515/helmin-2015-0027

Cited by 14 publications

(5 citation statements)

References 26 publications

(35 reference statements)

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“…Conversely, C. mydas rescued in Hawaii and Australia demonstrated poor body condition, severe lesions and high parasitic burdens that may have led to their death (GORDON et al, 1998;. Both the cause of death and secondary lesions have been associated with Spirorchiidae parasitosis in Brazil (GOLDBERG et al, 2013;WERNECK et al, 2015a;BINOTI et al, 2016). Therefore, continuous monitoring covering different geographic regions and identification of parasitic species may contribute towards a better understanding of associated pathologies or death and variation according to C. mydas age and nutritional status (GORDON et al, 1998;STACY et al, 2010).…”

Section: Mortality and Morbidity Of Chelonia Mydas Associated With Inmentioning

confidence: 99%

The green turtle Chelonia mydas as a marine and coastal environmental sentinels: anthropogenic activities and diseases

Domiciano

Domit

Bracarense

2017

SCA

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The green turtle Chelonia mydas as a marine and coastal environmental sentinels: anthropogenic activities and diseases Tartaruga-verde, Chelonia mydas, como sentinela do ambiente marinho e costeiro: atividades antrópicas e enfermidades AbstractThe green turtle Chelonia mydas is a widely distributed, slowly maturing species with a complex life cycle, using both oceanic and coastal environments. The species is exposed to different threats and is considered an environmental sentinel that indicates variation among, and the severity of hazards to marine ecosystems. This study aimed to describe both anthropogenic impacts, and infectious and parasitic diseases in C. mydas -including cases along the Brazilian coast -and implications for conservation. Bycatch is reported as the main threat to the conservation of this species, followed by debris ingestion, collisions with boats, dredging, and chronic environmental contamination. All of these impacts may directly or indirectly cause death, by facilitating contact with pathological agents and by increasing vulnerability to secondary diseases. The pathological agents associated with lesions include viruses, bacteria, fungi, protozoa, and helminths. Fibropapillomatosis is an example of a chronic disease characterized by cutaneous and visceral tumors that affects mostly juvenile C. mydas worldwide and is associated with the Chelonid herpesvirus 5. The bacterias Vibrio alginolyticus, Aeromonas hydrophila, and Pseudomonas fluorescens are found in the aquatic environment and among C. mydas lesions in various organs. Trematode adults and eggs of the family Spirorchiidae are also frequent in systemic cardiovascular diseases of C. mydas. The direct impacts of anthropogenic activities and diseases are synergistic and may affect the specie's health and conservation. Therefore, the monitoring and systematic diagnosing of diseases and causes of death -including necropsy, histopathology, and molecular exams -are necessary to assess a population's health, to support appropriate decisions of coastal management and to target future research topics that optimize C. mydas conservation. Key words: Bycatch. Conservation. Debris ingestion. Morbidity. Pathogenic agents. Sea turtle. ResumoA tartaruga-verde, Chelonia mydas, possui ampla distribuição geográfica, reprodução tardia e complexo ciclo de vida, habitando áreas costeiras e oceânicas. Devido a essas características, a espécie está exposta a diferentes tipos de ameaças e pode sinalizar sobre variações e a gravidade desses impactos ao longo do tempo no ecossistema, sendo considerada sentinela ambiental. Este trabalho teve por objetivo discorrer sobre relatos de atividades antrópicas impactantes e doenças infecciosas e parasitárias em C. mydas, com ênfase nas ocorrências no litoral brasileiro. A captura acidental em petrechos de pesca é uma das principais ameaças à conservação desses animais, assim como a ingestão de resíduos sólidos, colisão com embarcações, dragagens e bioacumulação de contaminantes químicos, os quais podem atuar diretament...

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Section: Mortality and Morbidity Of Chelonia Mydas Associated With Inmentioning

confidence: 99%

The green turtle Chelonia mydas as a marine and coastal environmental sentinels: anthropogenic activities and diseases

Domiciano

Domit

Bracarense

2017

SCA

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“…Spirorchiidiasis infections are high in marine turtles, globally affecting endangered sea turtle populations, as the Spirorchiidae family is near cosmopolitan in its distribution ( Chen et al, 2012 ; Chapman et al, 2017 , 2019 ; Santoro et al, 2020 ). This parasitic infection has, in fact, been significantly associated to sea turtle stranding and mortality events worldwide ( Santoro et al, 2007 ; Stacy et al, 2010 ; Werneck et al, 2015 ; Jerdy et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Serious lesions in Green turtles (Chelonia mydas) afflicted by fatal Spirorchiidiasis found stranded in south and southeastern Brazil

Jerdy¹,

Pires²,

Werneck³

et al. 2023

International Journal for Parasitology: Parasites and Wildlife

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“…The main finding is an inflammatory reaction composed of multinucleated giant cells, although eggs can be found without an inflammatory response in some cases (Jerdy et al ., 2016). The severe consequences of spirorchiidiosis are aneurysm, endocarditis, arteritis, embolism and thrombosis (Glazebrook et al ., 1989; Gordon et al ., 1998; Stacy et al ., 2010; Werneck et al ., 2015).…”

Section: Introductionmentioning

confidence: 99%

Ocular spirorchiidiosis in sea turtles from Brazil

Jerdy

Werneck²,

Goldberg

et al. 2019

J. Helminthol.

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The causes of the beaching and death of sea turtles have not been fully clarified and continue to be studied. Mild, moderate and severe lesions caused by spirorchiidiosis have been seen for decades in different organs and were recently defined as the cause of death of a loggerhead turtle. In the present study, eyes and optic nerves were analysed in green sea turtles with spirorchiidiosis and no other debilitating factors. Injuries to the optic nerve and choroid layer were described in 235 animals (90%) infected with spirorchiids. Turtles with ocular spirorchiidiosis are approximately three times more likely to be cachectic than turtles with spirorchiidiosis without ocular involvement.

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Pathological changes by Hapalotrema postorchis Rao 1976 (Digenea: Spirorchiidae) in a green turtle Chelonia mydas Linnaeus 1758 (Testudines, Cheloniidae) from Brazil

Cited by 14 publications

References 26 publications

The green turtle Chelonia mydas as a marine and coastal environmental sentinels: anthropogenic activities and diseases

The green turtle Chelonia mydas as a marine and coastal environmental sentinels: anthropogenic activities and diseases

Serious lesions in Green turtles (Chelonia mydas) afflicted by fatal Spirorchiidiasis found stranded in south and southeastern Brazil

Ocular spirorchiidiosis in sea turtles from Brazil

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