Hematological and histopathological evaluation of wildlife green turtles (Chelonia mydas) with and without fibropapilloma from the north coast of São Paulo State, Brazil

Zwarg, Ticiana; Rossi, Silmara; Sanches, Tatiana; Cesar, Marina de Oliveira; Werneck, Max Rondon; Matushima, Eliana Reiko

doi:10.1590/s0100-736x2014000700013

Cited by 18 publications

(14 citation statements)

References 24 publications

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“…The FP tumors exhibited varied morphology, color and texture (smooth to verruciform), as documented in previous studies in Brazil [41]. Most tumors were on the limbs, results consistent with previous studies on green sea turtles in Brazil [21,30,31] and southeastern USA [34].…”

Section: Discussionsupporting

confidence: 89%

Challenges in Evaluating the Severity of Fibropapillomatosis: A Proposal for Objective Index and Score System for Green Sea Turtles (Chelonia mydas) in Brazil

et al. 2016

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Fibropapillomatosis (FP) is a neoplastic disease that affects marine turtles worldwide, especially green sea turtles (Chelonia mydas). FP tumors can develop on the body surface of marine turtles and also internally in the oral cavity and viscera. Depending on their quantity, size and anatomical distribution, these tumors can interfere with hydrodynamics and the ability to feed, hence scoring systems have been proposed in an attempt to quantify the clinical manifestation of FP. In order to establish a new scoring system adapted to geographic regions, we examined 214 juvenile green sea turtles with FP caught or rescued at Brazilian feeding areas, counted their 7466 tumors and classified them in relation to their size and anatomical distribution. The patterns in quantity, size and distribution of tumors revealed interesting aspects in the clinical manifestation of FP in specimens studied in Brazil, and that FP scoring systems developed for other areas might not perform adequately when applied to sea turtles on the Southwest Atlantic Ocean. We therefore propose a novel method to evaluate the clinical manifestation of FP: fibropapillomatosis index (FPI) that provides the Southwest Atlantic fibropapillomatosis score (FPSSWA). In combination, these indexing and scoring systems allow for a more objective, rapid and detailed evaluation of the severity of FP in green sea turtles. While primarily designed for the clinical manifestation of FP currently witnessed in our dataset, this index and the score system can be adapted for other areas and compare the characteristics of the disease across regions. In conclusion, scoring systems to classify the severity of FP can assist our understanding on the environmental factors that modulate its development and its impacts on the individual and population health of green sea turtles.

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Section: Discussionsupporting

confidence: 89%

Challenges in Evaluating the Severity of Fibropapillomatosis: A Proposal for Objective Index and Score System for Green Sea Turtles (Chelonia mydas) in Brazil

et al. 2016

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“…There were no erythrocytosis observed according to Reséndiz [13] criteria and the values reported by [55], so we confirm that there were no dehydration, renal diseases, oxygenation problems or drowning threats, heart disease or neuropathies, and polycythemia [56,57]. Low values were not found either and autoimmune diseases, blood loss, bone marrow insufficiency, infections or neoplasms, hemolysis, prolonged infections, and nutritional deficiencies were dismissed [56,58].…”

Section: Erythrocytessupporting

confidence: 63%

Health Assessments in Free-Ranging Sea Turtles: Perspective of Animal Welfare in Wildlife

Reséndiz¹,

Lara-Uc²

2018

Animal Welfare

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Sea turtle health is an important component of conservation since these taxa is susceptible to infectious diseases that can cause illness increasing its mortality. Threats to health, survival, and reproduction of sea turtles are increasingly documented; however, prevention and control has not yet been successfully achieved. Thus, the need to develop conservation strategies on an ecosystem scale is a growing concern. Information about health indicators of sea turtles is a useful tool to achieve the best possible conservation measures. The objective of this study was to establish a baseline of health assessments of free-ranging Eastern Pacific green turtles (Chelonia mydas) from developmental habitats in Baja California Sur. Here we contribute with a clinical exam for sea turtles and reference interval values of vital signs (Corporal temperature: subadults, 21.22 ± 3.43; juveniles, 22.2 ± 2.95. Heart rate: subadults, 37.41 ± 2.95; juveniles, 38.27 ± 4.09. Pulse rate: subadults, 15.07 ± 3.88; juveniles, 19.97 ± 0.82), that in conjunction with the complete blood count and plasma blood biochemistry, 100% of the turtles were classified as "healthy." Development of site-specific health indicators for wild, healthy sea turtle populations is an important factor in creating effective management protocols and thus enhances our ability to understand the effects of anthropogenic and environmental changes on sea turtle health.

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“…Não foram observadas tartarugas dessa espécie acometidas pela doença na faixa biométrica inferior a 0,20m e acima de 1,00m. Os valores médios apresentados foram discretamente superiores àqueles registrados por Zwarg et al (2014), de 0,44m de CCC e 0,40m de LCC para a costa norte do Estado de São Paulo e por Santos et al (2010), para o Espírito Santo, de 0,42m de CCC. Ainda assim, a enfermidade acometeu as mesmas classes de estágios de vida registradas por Baptistotte (2007) de juvenis, sub-adultos e adultos.…”

Section: Chelonia Mydasunclassified

“…O número total de tumores variou de 1 a 124 em C. mydas e a média individual foi de 13 tumores por animal. Em estudo realizado por Zwarg et al (2014), os autores registraram valores limites semelhantes (4-129) em C. mydas com fibropapilomatose no Estado de São Paulo. O limite máximo do número de tumores e a média observados foram menores que os valores registrados por Baptistotte (2007), quando o número de tumores em um único animal variou de 1 a 179 e a média foi de 21 tumores por animal.…”

Section: Chelonia Mydasunclassified

Perfil Epidemiológico Da Fibropapilomatose Em Tartarugas-Marinhas Encalhadas Entre O Litoral Sul De Alagoas E Norte Da Bahia, Nordeste Do Brasil

Koproski¹,

Silva²,

Santos³

et al. 2017

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KOPROSKI, L.; SILVA, O. P. da; SANTOS, C. A. M.; FEBRÔNIO, A. M. B.; SANTANA, F. T. de; VERGARA-PARENTE, J. E. Perfil epidemiológico da fibropapilomatose em tartarugas-marinhas encalhadas entre o litoral sul de Alagoas e norte da Bahia, Nordeste do Brasil. Arq. Ciênc. Vet. Zool. UNIPAR, Umuarama, v. 20, n. 2, p. 49-56, abr./jun. 2017. RESUMO: Em um intervalo de quatro anos, a prevalência da fibropapilomatose em tartarugas encalhadas em uma região do nordeste do Brasil compreendida entre o sul de Alagoas e o norte da Bahia foi de 16% em Chelonia mydas, 2% em Caretta caretta e 0,6% em Lepidochelys olivacea. C. mydas acometidas apresentaram biometria média de 0,49m de Comprimento Curvilíneo da Carapaça -CCC. Machos e fêmeas foram igualmente acometidos, numa média de 22%. Pela análise de 1231 registros fotográficos, a média foi de 13 tumores por C. mydas. Nessa espécie 76,77% dos tumores foram registrados na parte anterior do corpo, 17,97% na região posterior, 4,12% na carapaça e plastrão e 1,0% nos globos oculares. Não foram registrados tumores na cavidade oral. C. mydas foram em sua maioria moderadamente afetadas pela doença. L. olivacea acometida apresentou biometria média de 0,69m de CCC. Machos e fêmeas foram atingidas numa média de 1,0%. Os tumores em L. olivacea foram observados na porção anterior e posterior do corpo. Somente um indivíduo do sexo masculino de C. caretta, com biometria de 1,03m de CCC apresentou sinal da doença. A C. caretta apresentava um tumor externo pedunculado na região cervical, de tamanho entre 1,1cm e 4,0cm de diâmetro. As prevalências da fibropapilomatose em Eretmochelys imbricata e Dermochelys coriacea foram de 0,0%. A prevalência da fibropapilomatose em C. mydas segue padrões encontrados para a costa brasileira. No entanto, a doença se manifesta com severidade levemente superior a encontrada no litoral da região sudeste do país. PALAVRAS-CHAVE: Neoplasia. Tartaruga-verde. Tartaruga-oliva. Tartaruga-cabeçuda. ABSTRACT:In a four-year review, the prevalence of fibropapillomatosis in turtles stranded in the region located in northeast of Brazil encompassing Southern Alagoas and Northern Bahia was 16% in Chelonia mydas, 2% in Caretta caretta and 0.6% in Lepidochelys olivacea. The affected C. mydas presented an average 0.49m Curvilinear Carapace Length -CCL. The disease affected 20% male and female C. mydas. By analyzing 1231 photos, C. mydas presented an average of 13 tumors. Regarding the tumor locations in C. mydas, 76.77% were recorded in the anterior body part, 17.97% in the posterior body region, 4.12% in the carapace and plastron, and 1.0% in the eyeballs. Oral cavity tumors were not found in C. mydas. C. mydas were mostly moderately affected by the disease. Affected L. olivacea presented an average 0.69m CCL. The disease equally affected 1.0% male and female individuals in that specie. Tumors were observed in L. olivacea in the anterior and posterior portion of the body. Only one male C. caretta presenting 1.03m CCL had signs of the disease, presenting one external tumor in the...

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Hematological and histopathological evaluation of wildlife green turtles (Chelonia mydas) with and without fibropapilloma from the north coast of São Paulo State, Brazil

Abstract: Pesq. Vet. Bras. 34 (7)

Cited by 18 publications

References 24 publications

Challenges in Evaluating the Severity of Fibropapillomatosis: A Proposal for Objective Index and Score System for Green Sea Turtles (Chelonia mydas) in Brazil

Challenges in Evaluating the Severity of Fibropapillomatosis: A Proposal for Objective Index and Score System for Green Sea Turtles (Chelonia mydas) in Brazil

Health Assessments in Free-Ranging Sea Turtles: Perspective of Animal Welfare in Wildlife

Perfil Epidemiológico Da Fibropapilomatose Em Tartarugas-Marinhas Encalhadas Entre O Litoral Sul De Alagoas E Norte Da Bahia, Nordeste Do Brasil

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