Loggerhead turtle, <i>Caretta caretta</i> (Linnaeus, 1758) (Testudines, Cheloniidae), as a new host of <i>Monticellius indicum</i> Mehra, 1939 (Digenea: Spirorchiidae) and associated lesiond to spirorchiid eggs

Werneck, Max Rondon; Nunes, Cáris Maroni; Jerdy, Hassan; Carvalho, Eulógio Carlos Queiróz de

doi:10.1515/helm-2017-0047

Cited by 6 publications

(5 citation statements)

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“…Long-term field monitoring projects including postmortem studies contribute to the information on the diseases and causes of mortality among sea turtles. However, studies on pathological findings on stranded wild loggerheads in Brazil are scarce and focusing on single case reports (Domiciano et al, 2014;Rossi et al, 2015;Werneck et al, 2017;Oliveira et al, 2020;Oriá et al, 2021).…”

Section: Resultsmentioning

confidence: 99%

“…Numerous studies have investigated the health of wild loggerheads (Stamper et al, 2005;Day et al, 2010;Rousselet et al, 2013;Stacy et al, 2018) examining various aspects such as contaminants (Keller et al, 2006;Bucchia et al, 2015), causes of stranding and mortality (Orós et al, 2016), and the presence of parasites (Werneck et al, 2017). However, studies specifically focusing on systemic histopathological aspects in this species are limited.…”

Section: Introductionmentioning

confidence: 99%

“…However, studies specifically focusing on systemic histopathological aspects in this species are limited. Most existing research has primarily documented the occurrence of parasites (Santoro et al, 2010(Santoro et al, , 2017Stacy et al, 2010;Werneck et al, 2017), with only a few reporting pathological findings in stranded C. caretta, such as those in Spain (Orós et al, 2005). Recently, septicemic listeriosis was reported in a loggerhead stranded along the Adriatic coast (Di Renzo et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Histopathological findings in stranded Caretta caretta (Linnaeus, 1758) on the Paraná coast, Southern Brazil

Ribeiro,

Matos,

Domit

et al. 2024

Sem. Ci. Agr.

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Caretta caretta, one of the five sea turtle species in Brazil, is currently listed as globally endangered. While health assessments are crucial for monitoring population status, they are infrequent and lack systematic implementation. Evaluating the health condition of sea turtles can occur through examinations of both live and deceased animals. Carcasses play a pivotal role in identifying diseases and potential threats impacting the species. Therefore, this study presents the histopathological findings from 20 dead stranded C. caretta along the Paraná coast between 2015 and 2021. All individuals underwent measurements, and necropsies were conducted. The mean curved carapace length (cm) was 67.3 ± 6.9 (49.4 – 81.5). Body condition was classified as good in 13 animals, fair in four, poor in two, and undetermined in one. Fourteen females, four males, and two undetermined sexes were registered, with a mean age of 15.8 ± 3,89 (ranging from 9 – 24) years. Evidence of anthropogenic interaction (10 bycatch interactions, 6 marine debris, 2 oil interactions combined with marine debris) was noted in 80.0% of the animals. Histological changes primarily affected the liver, lungs, spleen, and kidneys, with prominent alterations such as inflammatory infiltrate (interstitial pneumonia, heterophilic splenitis, nephritis, endocarditis), congestion, and hepatic and renal hydropic degeneration. This study significantly contributes to our understanding of pathological findings in stranded wild C. caretta on the Paraná coast, offering valuable insights into the health of these animals and aiding in the conservation efforts to protect their populations.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Histopathological findings in stranded Caretta caretta (Linnaeus, 1758) on the Paraná coast, Southern Brazil

Ribeiro,

Matos,

Domit

et al. 2024

Sem. Ci. Agr.

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“…The lesions caused by Spirorchiidae eggs are well described and are characterized by the formation of granulomas with giant cell infiltrations (Wolke et al, 1982; Gordon et al, 1998; Work et al, 2005; Flint et al, 2009; Flint et al, 2010; Marchiori et al, 2017; Ribeiro et al, 2017; Santoro et al, 2017; Werneck et al, 2017). Severe forms of the disease are generally associated with other problems such as fibropapillomatosis, coccidiosis and generalized infections with Gram-negative bacteria (Gordon et al, 1998; Raidal et al, 1998), but few studies exist attempting to relate parasite burdens to health outcomes.…”

Section: Introductionmentioning

confidence: 99%

“…Flint et al (2010) presented a similar methodology, scoring severity of spirorchiid infection from 0 to 3 (absent, mild, moderate or severe) based on presence of <5 or >5 eggs per 20X microscope field. This methodology was also used by Santoro et al (2017) and Werneck et al (2017). Whilst useful empirically, none of these methods relate egg counts to actual area or mass of tissue examined, making cross-study comparisons difficult.…”

Section: Introductionmentioning

confidence: 99%

Quantifying spirorchiid eggs in splenic histological samples from green turtles

D'Azeredo¹,

Meira-Filho²,

Work

2019

Helminthologia

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SummaryThe present study proposes a new methodology for the quantification of parasite eggs in animal tissue. Quantification of parasites are important to understand epidemiology of spirorchiid infections in sea turtles, however different methodologies for quantifying Spirorchiidae eggs in turtle tissues have been used. The most representative way to quantify Spirorchiidae burdens in tissues is counting eggs / g of tissue, however, this method is very laborious. As an alternative, we propose quantifying number of Spirorchiidae eggs/ area of tissue on a microscope slide. We compared this method to number of eggs / slide, a common metric of egg burden in turtle tissues. Both methods correlated well with eggs / g with eggs/mm2 of tissue having better correlation.

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Disease Risk Analysis in sea turtles: A baseline study to inform conservation efforts

Mashkour

Jones

Hipolito

et al. 2020

Preprint

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49The impact of a range of different threats has resulted in the listing of six out of seven sea turtle 50 species on the IUCN Red List of endangered species. Disease risk analysis (DRA) tools are designed to 51 provide objective, repeatable and documented assessment of the disease risks for a population and 52 measures to reduce these risks through management options. To the best of our knowledge, DRAs 53 have not previously been published for sea turtles, although disease is reported to contribute to sea 54 turtle population decline. Here, a comprehensive list of health hazards is provided for all seven 55 species of sea turtles. The possible risk these hazards pose to the health of sea turtles were assessed 56 and "One Health" aspects of interacting with sea turtles were also investigated. The risk assessment 57 was undertaken in collaboration with more than 30 experts in the field including veterinarians, 58 microbiologists, social scientists, epidemiologists and stakeholders, in the form of two international 59 workshops and one local workshop. The general finding of the DRA was the distinct lack of 60 knowledge regarding a link between the presence of pathogens and diseases manifestation in sea 61 turtles. A higher rate of disease in immunocompromised individuals was repeatedly reported and a 62 possible link between immunosuppression and environmental contaminants as a result of 63 anthropogenic influences was suggested. Society based conservation initiatives and as a result the 64 cultural and social aspect of interacting with sea turtles appeared to need more attention and 65 research. A risk management workshop was carried out to acquire the insights of local policy makers 66 about management options for the risks relevant to Queensland and the options were evaluated 67 considering their feasibility and effectiveness. The sea turtle DRA presented here, is a structured 68 guide for future risk assessments to be used in specific scenarios such as translocation and head-69 starting programs. 70 71 72 73 3 74 101 Species Survival Commission in 2014. The manual addresses different scenarios for endangered 102 species and translocating them for conservation purposes and enables the pros and cons of these 103actions to be thoroughly investigated (11). In order to accommodate the unique biology of sea 104 turtles, the DRA process as described in this manual requires certain modifications to realistically 105 articulate with situations such as translocating animals or investigating the risks of disease for a 106 population in its normal habitat. A 2015 study describes a systematic approach to investigate 107 disease-related population decline without confining the assessment to a particular scenario or 108 location (6). This method is a modified version of a DRA based on epidemiological principles (6) for 109 any declining wildlife population. A successful DRA considers the study population in the context of 110 the environment. 111In the 1960's, Calvin Schwabe coined the term "One Medicine" which then extended ...

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Loggerhead turtle, Caretta caretta (Linnaeus, 1758) (Testudines, Cheloniidae), as a new host of Monticellius indicum Mehra, 1939 (Digenea: Spirorchiidae) and associated lesiond to spirorchiid eggs

Cited by 6 publications

References 12 publications

Histopathological findings in stranded Caretta caretta (Linnaeus, 1758) on the Paraná coast, Southern Brazil

Histopathological findings in stranded Caretta caretta (Linnaeus, 1758) on the Paraná coast, Southern Brazil

Quantifying spirorchiid eggs in splenic histological samples from green turtles

Disease Risk Analysis in sea turtles: A baseline study to inform conservation efforts

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