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https://www.readbyqxmd.com/read/28528534/a-case-of-diprosopiasis-in-trachemys-scripta-scripta
#1
Giovanni Lanteri, Francesco Macri, Annamaria Passantino, Vincenzo Monteverde, Fabio Marino, Giuseppe Mazzullo
This short communication describes a case of diprosopiasis in Trachemys scripta scripta imported from Florida (USA) and farmed for about 4 months by a private owner in Palermo, Sicily, Italy. The water turtle showed the morphological and radiological features characterizing such deformity. This communication aims to advance the knowledge of the reptile's congenital anomalies and suggests the need for more detailed investigations to better understand its pathogenesis.
April 5, 2017: Veterinaria Italiana
https://www.readbyqxmd.com/read/28524816/phylogenetic-variation-of-chelonid-alphaherpesvirus-5-in-green-turtle-chelonia-mydas-populations-along-the-queensland-coast-australia
#2
E Ariel, F Nainu, K Jones, K Juntunen, I Bell, J Gaston, J Scott, S Trocini, G W Burgess
Sea turtle fibropapillomatosis (FP) is a disease marked by proliferation of benign but debilitating cutaneous and occasional visceral tumours, likely to be caused by chelonid alphaherpesvirus 5 (ChHV5). This study presents a phylogeny of ChHV5 strains on the east coast of Queensland, Australia and a validation for previously unused primers. Two different primer sets (gB-1534 and gB-813) were designed to target a region including part of the UL27 glycoprotein B (gB) gene and part of UL28 of ChHV5. Sequences obtained from FP tumours on juvenile green turtles (<65 cm CCL) had substantial homology with published ChHV5 sequences while a skin biopsy from a turtle without FP failed to react in the PCRs used in this study...
May 19, 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28523151/ards-onset-time-and-prognosis-is-it-a-turtle-and-rabbit-race
#3
EDITORIAL
Davide Chiumello, Antonella Marino
No abstract text is available yet for this article.
April 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28521843/high-prevalence-of-trichomonas-gallinae-in-wild-columbids-across-western-and-southern-europe
#4
Melanie Marx, Gerald Reiner, Hermann Willems, Gregorio Rocha, Klaus Hillerich, Juan F Masello, Sylvia L Mayr, Sarah Moussa, Jenny C Dunn, Rebecca C Thomas, Simon J Goodman, Keith C Hamer, Benjamin Metzger, Jacopo G Cecere, Fernando Spina, Steffen Koschkar, Luciano Calderón, Tanja Romeike, Petra Quillfeldt
BACKGROUND: Avian trichomonosis is known as a widespread disease in columbids and passerines, and recent findings have highlighted the pathogenic character of some lineages found in wild birds. Trichomonosis can affect wild bird populations including endangered species, as has been shown for Mauritian pink pigeons Nesoenas mayeri in Mauritius and suggested for European turtle doves Streptopelia turtur in the UK. However, the disease trichomonosis is caused only by pathogenic lineages of the parasite Trichomonas gallinae...
May 18, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28521388/non-targeted-high-resolution-mass-spectrometry-strategy-for-simultaneous-monitoring-of-xenobiotics-and-endogenous-compounds-in-green-sea-turtles-on-the-great-barrier-reef
#5
Amy L Heffernan, Maria M Gómez-Ramos, Caroline Gaus, Soumini Vijayasarathy, Ian Bell, Christine Hof, Jochen F Mueller, Maria J Gómez-Ramos
Chemical contamination poses a threat to ecosystem, biota and human health, and identifying these hazards is a complex challenge. Traditional hazard identification relies on a priori-defined targets of limited chemical scope, and is generally inappropriate for exploratory studies such as explaining toxicological effects in environmental systems. Here we present a non-target high resolution mass spectrometry environmental monitoring study with multivariate statistical analysis to simultaneously detect biomarkers of exposure (e...
May 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28515008/localization-and-distribution-of-gonadal-proteins-in-the-oviparous-lizard-sceloporus-aeneus-squamata-phrynosomatidae
#6
Antonio-Rubio Nivia Rocio, Villagrán-SantaCruz Maricela, Moreno-Mendoza Norma
Among vertebrates, several specific proteins are involved in the function and development of gonads. Several genes such as SOX9, FOXL2, DDX4, IFITM3, and DPPA3, are active during embryonic differentiation and maintain their expression in adult tissues, playing important roles in the function and development of the line cell, where these are produced. Among reptiles, molecular mechanisms for sex differentiation have been analyzed in turtles, crocodiles, and some lizards, while in adult stages such studies are scarce...
May 14, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28512730/examining-the-role-of-transmission-of-chelonid-alphaherpesvirus-5
#7
Andrea Chaves, A Alonso Aguirre, Kinndle Blanco-Peña, Andrés Moreira-Soto, Otto Monge, Ana M Torres, José L Soto-Rivas, Yuanan Lu, Didiher Chacón, Luis Fonseca, Mauricio Jiménez, Gustavo Gutiérrez-Espeleta, Michael Lierz
Marine turtle fibropapillomatosis (FP) is a devastating neoplastic disease characterized by single or multiple cutaneous and visceral fibrovascular tumors. Chelonid alphaherpesvirus 5 (ChHV5) has been identified as the most likely etiologic agent. From 2010 to 2013, the presence of ChHV5 DNA was determined in apparently normal skin, tumors and swab samples (ocular, nasal and cloacal) collected from 114 olive ridley (Lepidochelys olivacea) and 101 green (Chelonia mydas) turtles, with and without FP tumors, on the Pacific coasts of Costa Rica and Nicaragua...
May 16, 2017: EcoHealth
https://www.readbyqxmd.com/read/28511134/cadmium-toxicokinetics-in-the-freshwater-turtle-chinemys-reevesii
#8
Junfeng Huo, Aiguo Dong, Juanjuan Yan, Lan Wang, Cungen Ma, Shaochin Lee
This study was designed to investigate the toxicokinetics of Cadmium (Cd) in Chinemys reevesii. The animals were exposed to 15 mg/kg Cd chloride by intraperitoneal injection, and the Cd absorption, distribution, and excretion in different organs were determined. The results showed that Cd absorption reached its peak in the blood at 3 h after treatment. The accumulation of Cd was the highest in the liver and the second highest in the pancreas. All other tissues also accumulated Cd, such as spleen, kidney, intestine, lung, stomach, heart, brain, muscle...
May 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28508199/selective-specificity-of-calcium-binding-proteins-calbindin-and-calretinin-expression-in-the-magnocellular-neurosecretory-hypothalamic-nuclei-of-tortoises-and-turtles
#9
M G Belekhova, N B Kenigfest, E V Chernigovskaya, N P Veselkin
We have studied the distribution of calcium-binding proteins in the magnocellular neurosecretory nuclei of nonapeptidergic neurosecretory nuclei of the preoptic-hypothalamic complex in a tortoise (Testudo horsfieldi) and a pond turtle (Emys orbicularis) using immunohistochemistry. We have found that different types of cells in the paraventricular and supraoptic nuclei predominantly express calbindin and, to a lesser extent, calretinin, but not parvalbumin. The selective calbindin/calretinin control of the neurohormone secretion in these hypothalamic nuclei is an evolutionary conservative feature typical of reptiles and mammals...
March 2017: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28506988/dmrt1-induces-the-male-pathway-in-a-turtle-with-temperature-dependent-sex-determination
#10
Chutian Ge, Jian Ye, Haiyan Zhang, Yi Zhang, Wei Sun, Yapeng Sang, Blanche Capel, Guoying Qian
The molecular mechanism underlying temperature-dependent sex determination (TSD) has been a long-standing mystery; in particular, the thermo-sensitive genetic triggers for gonadal sex differentiation are largely unknown. Here, we characterized a conserved DM domain gene, Dmrt1, in the red-eared slider turtle Trachemys scripta (T. scripta), which exhibits TSD. We found that Dmrt1 has a temperature-dependent, sexually dimorphic expression pattern, preceding gonadal sex differentiation, and is capable of responding rapidly to temperature shifts and aromatase inhibitor treatment...
May 15, 2017: Development
https://www.readbyqxmd.com/read/28504668/hla-e-expressing-pluripotent-stem-cells-escape-allogeneic-responses-and-lysis-by-nk-cells
#11
Germán G Gornalusse, Roli K Hirata, Sarah E Funk, Laura Riolobos, Vanda S Lopes, Gabriel Manske, Donna Prunkard, Aric G Colunga, Laïla-Aïcha Hanafi, Dennis O Clegg, Cameron Turtle, David W Russell
Polymorphisms in the human leukocyte antigen (HLA) class I genes can cause the rejection of pluripotent stem cell (PSC)-derived products in allogeneic recipients. Disruption of the Beta-2 Microglobulin (B2M) gene eliminates surface expression of all class I molecules, but leaves the cells vulnerable to lysis by natural killer (NK) cells. Here we show that this 'missing-self' response can be prevented by forced expression of minimally polymorphic HLA-E molecules. We use adeno-associated virus (AAV)-mediated gene editing to knock in HLA-E genes at the B2M locus in human PSCs in a manner that confers inducible, regulated, surface expression of HLA-E single-chain dimers (fused to B2M) or trimers (fused to B2M and a peptide antigen), without surface expression of HLA-A, B or C...
May 15, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28504478/reduced-egg-shell-permeability-affects-embryonic-development-and-hatchling-traits-in-dinodon-rufozonatum-and-pelodiscus-sinensis
#12
Wen-Qi Tang, Bo Zhao, Ye Chen, Wei-Guo Du
The response of embryos to unpredictable hypoxia is critical for successful embryonic development, yet there remain significant gaps in our understanding of such responses in reptiles with different types of eggshell. We experimentally generated external regional hypoxia by sealing either the upper- or bottom-half of the surface area of eggs in two species of reptiles [snake (Dinodon rufozonatum) with parchment eggshell and Chinese soft-shelled turtle (Pelodiscus sinensis) with rigid eggshell], then monitored growth pattern of the opaque white patch in turtle eggs, embryonic heart rate, developmental rate, and hatchling traits in turtle and snake eggs in response to external regional hypoxia...
May 15, 2017: Integrative Zoology
https://www.readbyqxmd.com/read/28501632/high-levels-of-maternally-transferred-mercury-disrupt-magnetic-responses-of-snapping-turtle-hatchlings-chelydra-serpentina
#13
Lukas Landler, Michael S Painter, Brittney Hopkins Coe, Paul W Youmans, William A Hopkins, John B Phillips
The Earth's magnetic field is involved in spatial behaviours ranging from long-distance migration to non-goal directed behaviours, such as spontaneous magnetic alignment (SMA). Mercury is a harmful pollutant most often generated from anthropogenic sources that can bio-accumulate in animal tissue over a lifetime. We compared SMA of hatchling snapping turtles from mothers captured at reference (i.e., low mercury) and mercury contaminated sites. Reference turtles showed radio frequency-dependent SMA along the north-south axis, consistent with previous studies of SMA, while turtles with high levels of maternally inherited mercury failed to show consistent magnetic alignment...
May 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28501611/multilocus-phylogeny-and-statistical-biogeography-clarify-the-evolutionary-history-of-major-lineages-of-turtles
#14
Anieli G Pereira, Juliana Sterli, Filipe R R Moreira, Carlos G Schrago
Despite their complex evolutionary history and the rich fossil record, the higher level phylogeny and historical biogeography of living turtles have not been investigated in a comprehensive and statistical framework. To tackle these issues, we assembled a large molecular dataset, maximizing both taxonomic and gene sampling. As different models provide alternative biogeographical scenarios, we have explicitly tested such hypotheses in order to reconstruct a robust biogeographical history of Testudines. We scanned publicly available databases for nucleotide sequences and composed a dataset comprising 13 loci for 294 living species of Testudines, which accounts for all living genera and 85% of their extant species diversity...
May 10, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28496982/blood-gases-biochemistry-and-haematology-of-gal%C3%A3-pagos-hawksbill-turtles-eretmochelys-imbricata
#15
Juan Pablo Muñoz-Pérez, Gregory A Lewbart, Maximilian Hirschfeld, Daniela Alarcón-Ruales, Judith Denkinger, Jason Guillermo Castañeda, Juan García, Kenneth J Lohmann
The hawksbill turtle, Eretmochelys imbricata, is a marine chelonian with a circum-global distribution, but the species is critically endangered and has nearly vanished from the eastern Pacific. Although reference blood parameter intervals have been published for many chelonian species and populations, including nesting Atlantic hawksbills, no such baseline biochemical and blood gas values have been reported for wild Pacific hawksbill turtles. Blood samples were drawn from eight hawksbill turtles captured in near shore foraging locations within the Galápagos archipelago over a period of four sequential years; three of these turtles were recaptured and sampled on multiple occasions...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28495871/embryonic-hypoxia-programmes-postprandial-cardiovascular-function-in-adult-common-snapping-turtles-chelydra-serpentina
#16
Oliver H Wearing, Justin Conner, Derek Nelson, Janna Crossley, Dane A Crossley
Reduced oxygen availability (hypoxia) is a potent stressor during embryonic development, altering the trajectory of trait maturation and organismal phenotype. We previously documented that chronic embryonic hypoxia has a lasting impact on the metabolic response to feeding in juvenile snapping turtles (Chelydra serpentina). Turtles exposed to hypoxia as embryos (10% O2, H10) exhibited an earlier and increased peak postprandial oxygen consumption rate, compared to control turtles (21% O2, N21). In the current study, we measured central blood flow patterns to determine whether the elevated postprandial metabolic response in H10 turtles is linked to lasting impacts on convective transport...
May 11, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28493980/characterization-of-the-juvenile-green-turtle-chelonia-mydas-microbiome-throughout-an-ontogenetic-shift-from-pelagic-to-neritic-habitats
#17
James T Price, Frank V Paladino, Margaret M Lamont, Blair E Witherington, Scott T Bates, Tanya Soule
The gut microbiome of herbivorous animals consists of organisms that efficiently digest the structural carbohydrates of ingested plant material. Green turtles (Chelonia mydas) provide an interesting model of change in these microbial communities because they undergo a pronounced shift from a surface-pelagic distribution and omnivorous diet to a neritic distribution and herbivorous diet. As an alternative to direct sampling of the gut, we investigated the cloacal microbiomes of juvenile green turtles before and after recruitment to neritic waters to observe any changes in their microbial community structure...
2017: PloS One
https://www.readbyqxmd.com/read/28492802/gonadotrophic-prolactin-corticosterone-and-gonadal-hormones-levels-over-15-months-in-giant-amazon-river-turtles-podocnemis-expansa-schweigger-1812-testudines-podocnemididae-in-captive-conditions
#18
G E Freneau, V A Sá, C R Franci, D Vieira, B N Freneau
In order to achieve successful captive breeding the Podocnemis expansa, it is necessary to study their reproductive endocrinology. The purpose of this research was to evaluate and characterize plasma concentrations in gonadotrophic, gonadic, corticosterone and prolactin hormones from Giant Amazon Turtles under captive conditions. Blood samples were collected over a 15 month period. The samples were assayed by the use of radioimmunoassay, prolactin, corticosterone, LH, FSH, testosterone, 17β-estradiol and progesterone...
May 4, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28491275/outflow-tract-septation-and-the-aortic-arch-system-in-reptiles-lessons-for-understanding-the-mammalian-heart
#19
Robert E Poelmann, Adriana C Gittenberger-de Groot, Marcel W M Biermans, Anne I Dolfing, Armand Jagessar, Sam van Hattum, Amanda Hoogenboom, Lambertus J Wisse, Rebecca Vicente-Steijn, Merijn A G de Bakker, Freek J Vonk, Tatsuya Hirasawa, Shigeru Kuratani, Michael K Richardson
BACKGROUND: Cardiac outflow tract patterning and cell contribution are studied using an evo-devo approach to reveal insight into the development of aorto-pulmonary septation. RESULTS: We studied embryonic stages of reptile hearts (lizard, turtle and crocodile) and compared these to avian and mammalian development. Immunohistochemistry allowed us to indicate where the essential cell components in the outflow tract and aortic sac were deployed, more specifically endocardial, neural crest and second heart field cells...
2017: EvoDevo
https://www.readbyqxmd.com/read/28487057/investigation-of-plastic-debris-ingestion-by-four-species-of-sea-turtles-collected-as-bycatch-in-pelagic-pacific-longline-fisheries
#20
Katharine E Clukey, Christopher A Lepczyk, George H Balazs, Thierry M Work, Jennifer M Lynch
Ingestion of marine debris is an established threat to sea turtles. The amount, type, color and location of ingested plastics in the gastrointestinal tracts of 55 sea turtles from Pacific longline fisheries from 2012 to 2016 were quantified, and compared across species, turtle length, body condition, sex, capture location, season and year. Six approaches for quantifying amounts of ingested plastic strongly correlated with one another and included: number of pieces, mass, volume and surface area of plastics, ratio of plastic mass to body mass, and percentage of the mass of gut contents consisting of plastic...
May 6, 2017: Marine Pollution Bulletin
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