The Hawksbill Sea Turtle<i>Eretmochelys imbricata</i>Linnaeus 1758 (Testudines, Cheloniidae) as New Host of<i>Hapalotrema postorchis</i>Rao, 1976 (Digenea: Spirorchiidae)

Werneck, Max Rondon; Baldassin, Paula; D'Azeredo, Felipe; Trazi, Alessandro; Berger, Bruno

doi:10.1654/4662.1

Cited by 17 publications

(12 citation statements)

References 12 publications

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“…Taxonomic keys for genera (Platt, 2002) and species (Platt and Blair, 1998) were used for the characterization of the specimens. Morphological and morphometric data from studies by Rao (1976), Dailey et al (1993), Cribb and Gordon (1998) and Werneck et al (2014) were used for purposes of comparison (Table 1) …”

Section: Methodsmentioning

confidence: 99%

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

Werneck¹,

Souza

Berger

et al. 2015

Helminthologia

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SummaryThis note reports the occurrence of Hapalotrema postorchis Rao 1976 collected from an aortic aneurysm in a green turtle (Chelonia mydas Linnaeus 1758) found on the coast of Brazil. Besides the vascular lesion, granulomatous reactions with foreign -body giant cells were found surrounding the parasite eggs in the heart, intestines, liver, pancreas, spleen, brain and kidneys. This paper presents the fi rst report of H. postorchis and accompanying lesions in a green sea turtle from the western South Atlantic Ocean.

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Section: Methodsmentioning

confidence: 99%

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

Werneck¹,

Souza

Berger

et al. 2015

Helminthologia

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“…Host and distribution: C. mydas from Brazil (Werneck et al, 2015d) and Costa Rica (Santoro et al, 2006); E. imbricata from Brazil (Werneck et al, 2014).…”

Section: Hapalotrema Postorchis Rao 1976mentioning

confidence: 99%

Checklist of sea turtles endohelminth in Neotropical region

Werneck¹,

Silva

2016

Helminthologia

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SummaryThis paper presents a list of parasites described in sea turtles from the Neotropical region. Through the review of literature the occurrence of 79 taxa of helminthes parasites were observed, mostly consisting of the Phylum Platyhelminthes with 76 species distributed in 14 families and 2 families of the Phylum Nematoda within 3 species. Regarding the parasite records, the most studied host was the green turtle (Chelonia mydas) followed by the hawksbill turtle (Eretmochelys imbricata), olive ridley turtle (Lepidochelys olivacea), loggerhead turtle (Caretta caretta) and leatherback turtle (Dermochelys coriacea). Overall helminths were reported in 12 countries and in the Caribbean Sea region. This checklist is the largest compilation of data on helminths found in sea turtles in the Neotropical region.

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“…One description of L. learedi from the Atlantic Ocean is available (Werneck et al, 2014). This study from off Brazil reported no notable differences between the Atlantic specimens and descriptions published from the east Pacific (off Mexico), excepting a slightly longer cirrus-sac.…”

Section: Taxonomymentioning

confidence: 48%

“…However, when compared with the measurements reported by Rao (1976) and Dailey et al (1993), our specimens are on average smaller and have fewer testes. The morphometric data published by Werneck et al (2014) from off Brazil are based on a single specimen; the measurements provided are smaller than those for our specimens in some instances (e.g.…”

Section: Remarksmentioning

confidence: 73%

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Diversity, impacts and diagnosis of pathogenic parasites in sea turtles from Queensland, Australia

Chapman¹

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Parasitism is a significant cause of stranding and mortality in endangered sea turtles. Two parasites in particular (or groups thereof) have been noted for their impacts on green sea turtle populations. The first are the spirorchiid blood flukes, which inhabit the circulatory systems of their host. The second is the eimeriid coccidian Caryospora cheloniae, a systemic parasite affecting a number of organs. Diversity among these organisms is poorly explored, and is almost certainly greater than currently recognised. The parasites and their associated diseases fluctuate both temporally and spatially in terms of prevalence and severity, however, the factors driving these fluctuations are poorly understood. A variety of questions remain unanswered in terms of the epidemiology and relative pathogenicity of the different parasite species. Of particular interest are brain lesions, which have been associated with both parasites and in some cases lead to neurological deficiency and subsequent mortality. Difficulties in finding answers to these questions is compounded by a lack of reliable, fast and quantitative ante-and post-mortem diagnostic tools for either parasite, which restricts their investigation.In order to catalogue local species and assess diversity, adult spirorchiid flukes were collected during post-mortem examination of deceased sea turtles and characterised by molecular and morphological means. Eleven distinct species or genotypes were identified, comprising a mix of previously described and novel species or variants. Samples were also collected from green sea turtles that died during a coccidiosis related mass mortality event in south east Queensland and northern New South Wales. While only one species of coccidian (C. cheloniae) had been previously described, molecular characterisation of the organism implicated in the outbreak revealed two distinct coccidian genotypes, which has significant implications for diagnosis and management.Spirorchiid ova have been associated with granulomatous lesions in a wide range of host tissues. However, it has not been possible to identify spirorchiids beyond the genus level based on morphology, which has frustrated any attempts to identify the species or variants responsible for severe lesions. In this thesis, a molecular approach was used and a terminal restriction fragment length polymorphism (T-RFLP) assay was developed to detect and identify individual species within the often mixed assemblages of ova in turtle tissues. This assay proved to be a more specific and sensitive alternative to traditional iii microscopic detection methods. Through correlation with histopathology and gross pathology, the tissue tropisms, relative occurrence and pathogenicity of each species were investigated. The most common species (Neospirorchis Genotype 2) was found in 96% of samples, encompassing tissues from all organs sampled. On average, a greater number of spirorchiid species were detected in tissues where lesions were present, and numbers increased along with the severity o...

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The Hawksbill Sea TurtleEretmochelys imbricataLinnaeus 1758 (Testudines, Cheloniidae) as New Host ofHapalotrema postorchisRao, 1976 (Digenea: Spirorchiidae)

Cited by 17 publications

References 12 publications

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

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

Checklist of sea turtles endohelminth in Neotropical region

Diversity, impacts and diagnosis of pathogenic parasites in sea turtles from Queensland, Australia

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