Base de dados : MEDLINE
Pesquisa : B01.050.150.900.649.313.998.750.500 [Categoria DeCS]
Referências encontradas : 120 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 12 ir para página                         

  1 / 120 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29256429
[Au] Autor:Wyrosdick HM; Gerhold R; Su C; Mignucci-Giannoni AA; Bonde RK; Chapman A; Rivera-Pérez CI; Martinez J; Miller DL
[Ad] Endereço:University of Tennessee, Center for Wildlife Health, Department of Forestry, Wildlife, and Fisheries, Knoxville, TN 37996, USA.
[Ti] Título:Investigating seagrass in Toxoplasma gondii transmission in Florida (Trichechus manatus latirostris) and Antillean (T. m. manatus) manatees.
[So] Source:Dis Aquat Organ;127(1):65-69, 2017 Dec 19.
[Is] ISSN:0177-5103
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Toxoplasma gondii is a feline protozoan reported to cause morbidity and mortality in manatees and other marine mammals. Given the herbivorous nature of manatees, ingestion of oocysts from contaminated water or seagrass is presumed to be their primary mode of infection. The objectives of this study were to investigate oocyst contamination of seagrass beds in Puerto Rico and determine the seroprevalence of T. gondii in Antillean (Trichechus manatus manatus) and Florida (T. m. latirostris) manatees. Sera or plasma from Antillean (n = 5) and Florida (n = 351) manatees were tested for T. gondii antibodies using the modified agglutination test. No T. gondii DNA was detected via PCR in seagrass samples (n = 33) collected from Puerto Rico. Seroprevalence was 0%, suggesting a lower prevalence of T. gondii in these manatee populations than previously reported. This was the first study to investigate the potential oocyst contamination of the manatee diet, and similar studies are important for understanding the epidemiology of T. gondii in herbivorous marine mammals.
[Mh] Termos MeSH primário: Plantas/parasitologia
Toxoplasma
Toxoplasmose Animal/transmissão
Trichechus manatus/parasitologia
[Mh] Termos MeSH secundário: Animais
Animais Selvagens
Florida/epidemiologia
Porto Rico/epidemiologia
Toxoplasmose Animal/sangue
Toxoplasmose Animal/parasitologia
Trichechus manatus/sangue
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171220
[St] Status:MEDLINE
[do] DOI:10.3354/dao03181


  2 / 120 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28467282
[Au] Autor:Ferrante JA; Cortés-Hinojosa G; Archer LL; Wellehan JFX
[Ad] Endereço:Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL.
[Ti] Título:Development of a quantitative PCR assay for measurement of trichechid herpesvirus 1 load in the Florida manatee ( Trichechus manatus latirostris).
[So] Source:J Vet Diagn Invest;29(4):476-482, 2017 Jul.
[Is] ISSN:1943-4936
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Trichechid herpesvirus 1 (TrHV-1) is currently the only known herpesvirus in any sirenian. We hypothesized that stress may lead to recrudescence of TrHV-1 in manatees, thus making TrHV-1 a potential biomarker of stress. We optimized and validated a TrHV-1 real-time quantitative probe hybridization PCR (qPCR) assay that was used to quantify TrHV-1 in manatee peripheral blood mononuclear cells (PBMCs). Average baseline TrHV-1 loads in a clinically healthy wild Florida manatee ( Trichechus manatus latirostris) population ( n = 42) were 40.9 ± SD 21.2 copies/100 ng DNA; 19 of 42 manatees were positive. TrHV-1 loads were significantly different between the 2 field seasons ( p < 0.025). This optimized and validated qPCR assay may be used as a tool for further research into TrHV-1 in Florida manatees.
[Mh] Termos MeSH primário: Gammaherpesvirinae/isolamento & purificação
Infecções por Herpesviridae/veterinária
Reação em Cadeia da Polimerase em Tempo Real/veterinária
Trichechus manatus
[Mh] Termos MeSH secundário: Animais
Feminino
Florida/epidemiologia
Infecções por Herpesviridae/diagnóstico
Infecções por Herpesviridae/epidemiologia
Masculino
Prevalência
Reação em Cadeia da Polimerase em Tempo Real/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171212
[Lr] Data última revisão:
171212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170504
[St] Status:MEDLINE
[do] DOI:10.1177/1040638717707554


  3 / 120 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28792416
[Au] Autor:Barratclough A; Conner BJ; Brooks MB; Pontes Stablein A; Gerlach TJ; Reep RL; Ball RL; Floyd RF
[Ad] Endereço:Tampa's Lowry Park Zoo, Tampa, Florida 33714, USA.
[Ti] Título:Identifying coagulopathies in the pathophysiology of cold stress syndrome in the Florida manatee Trichechus manatus latirostris.
[So] Source:Dis Aquat Organ;125(3):179-188, 2017 Aug 09.
[Is] ISSN:0177-5103
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Cold stress syndrome (CSS) in the Florida manatee Trichechus manatus latirostris has been defined as morbidity and mortality resulting from prolonged exposure to water temperatures <20°C. The pathophysiology is described as multifactorial, involving nutritional, immunological and metabolic disturbances; however, the exact mechanisms are unknown. We hypothesized that thromboembolic complications contribute to the pathophysiology of CSS in addition to the previously described factors. During the winter of 2014-2015, 10 Florida manatees with clinical signs of CSS were presented to Lowry Park Zoo, Tampa, FL, USA. Thromboelastography (TEG) and coagulation panels were performed at admission. In addition, coagulation panel data from 23 retrospective CSS cases were included in the analyses. There were numerous differences between mean values of TEG and coagulation parameters for healthy manatees and those for CSS cases. Among TEG parameters, reaction time (R), clot formation time (K) and percentage of clot lysed after 30 min (LY30) values were significantly different (p < 0.05) between the 2 groups. CSS cases also had significantly higher mean D-dimer concentration and coagulation factor XI activity, prolonged mean activated partial thromboplastin time (aPTT) and significantly decreased mean antithrombin activity. These combined abnormalities include clinicopathologic criteria of disseminated intravascular coagulation, indicating an increased risk of thromboembolic disease associated with manatee CSS.
[Mh] Termos MeSH primário: Transtornos da Coagulação Sanguínea/veterinária
Temperatura Baixa
Estresse Fisiológico
Trichechus manatus/sangue
[Mh] Termos MeSH secundário: Animais
Transtornos da Coagulação Sanguínea/etiologia
Estudos Retrospectivos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170810
[St] Status:MEDLINE
[do] DOI:10.3354/dao03149


  4 / 120 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28363081
[Au] Autor:Barratclough A; Ball RL; Floyd RF; Reep RL; Conner BJ
[Ti] Título:PROPOSAL AND APPLICATION OF A NOVEL DISSEMINATED INTRAVASCULAR COAGULATION SCORING SYSTEM IN THE FLORIDA MANATEE (TRICHECHUS MANATUS LATIROSTRIS).
[So] Source:J Zoo Wildl Med;48(1):152-158, 2017 Mar.
[Is] ISSN:1042-7260
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Disseminated intravascular coagulopathy (DIC) is an acquired disorder of hemostasis resulting in activation of the coagulation and fibrinolytic pathways. It is reported secondarily to multiple disease processes and can be associated with increased mortality. Previous research at Tampa's Lowry Park Zoo (LPZ) demonstrated that Florida manatees ( Trichechus manatus latirostris) with cold stress syndrome (CSS) demonstrated thromboembolic disease. The object of this retrospective study was to establish the presence and clinical relevance of DIC in Florida manatees admitted to LPZ for rehabilitation from 07 March 2010 to 15 August 2015. A coagulation panel, including prothrombin time, partial thromboplastin time, platelet count, fibrinogen level, and D-dimer level was used to diagnose DIC. There were 100 cases identified in the study period: 35 trauma, 43 CSS, 17 secondary to harmful algae blooms (HAB), and five miscellaneous. Manatees with CSS had the highest incidence of DIC with 24 of 43 cases (56%) affected, followed by trauma with 18 of 35 cases (52%) affected. None of the manatees with HAB were found to have DIC. Manatees that developed DIC during rehabilitation or when DIC progressed did not survive. Due to the clinical implications of DIC, identifying its presence and recognizing its severity could improve clinical outcomes by enabling more intensive treatment protocols.
[Mh] Termos MeSH primário: Coagulação Intravascular Disseminada/veterinária
Trichechus manatus/sangue
[Mh] Termos MeSH secundário: Animais
Coagulação Sanguínea/fisiologia
Testes de Coagulação Sanguínea/veterinária
Estudos de Casos e Controles
Coagulação Intravascular Disseminada/classificação
Coagulação Intravascular Disseminada/diagnóstico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170619
[Lr] Data última revisão:
170619
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170401
[St] Status:MEDLINE
[do] DOI:10.1638/2016-0050.1


  5 / 120 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28363079
[Au] Autor:Silva MC; Attademo FF; Freire AC; Sousa GP; Luna FO; Lima DC; Mota RA; Mendes ES; Silva JC
[Ti] Título:IDENTIFICATION OF BACTERIA IN BLOOD CULTURES FROM CLINICALLY ILL CAPTIVE ANTILLEAN MANATEES (TRICHECHUS MANATUS MANATUS).
[So] Source:J Zoo Wildl Med;48(1):13-17, 2017 Mar.
[Is] ISSN:1042-7260
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Between September 2001 and March 2013, 62 bacterial cultures (37 aerobic and 25 anaerobic) were performed on 37 blood samples from 23 Antillean manatees ( Trichechus manatus manatus) that were kept in captivity at the Brazilian National Center for Research and Conservation of Aquatic Mammals (CMA) in Pernambuco (CMA-PE) and Alagoas (CMA-AL), Brazil. All of the animals sampled exhibited clinical signs at the time of sampling including abscesses (n = 8), debilitation and anorexia (n = 22), and profound lethargy-moribundity (n = 7). The 4 animals with profound lethargy-moribundity died shortly after sampling of unknown causes. Bacteria were isolated from 15/37 (40.5%) and aerobic blood cultures from 13/23 animals (56.5%). None of the anaerobic cultures were positive. Aeromonas caviae , Aeromonas hydrophila , Aeromonas sp., Escherichia coli , Leclercia adecarboxylata , Pantoea agglomerans , Pseudomonas aeruginosa , Pseudomonas stutzeri , Pseudomonas sp., Sphingomonas paucimobilis , coagulase-negative Staphylococcus, and Staphylococcus epidermidis were each found in only one animal; Staphylococcus spp. was found in two; and Vibrio fluvialis in four. Thirteen samples had only one bacteria isolated, one sample had two bacteria, and one sample had three bacteria isolated. Regarding sex, age group, and origin among the manatees examined, 54.5% (6/11) of the females, 58.3% (7/12) of the males, 40% (2/5) of the calves, 66.7% (8/12) of the juveniles, 50% (3/6) of the adults, 55.5% (10/18) at CMA-PE, and 60% (3/5) at CMA-AL were found to be positive for bacterial growth during at least one sampling time. All Antillean manatees were clinically ill. Regarding clinical signs, bacteria were found in 50% (11/22) of blood samples of the animals showing debilitation and anorexia, 1 of 8 (12.5%) of blood samples of the animals showing abscesses, and 3 of 7 (42.9%) of blood samples of the animals showing profound lethargy-moribundity.
[Mh] Termos MeSH primário: Bacteriemia/veterinária
Técnicas Bacteriológicas/veterinária
Trichechus manatus/sangue
[Mh] Termos MeSH secundário: Animais
Bacteriemia/sangue
Feminino
Masculino
Trichechus manatus/microbiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170619
[Lr] Data última revisão:
170619
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170401
[St] Status:MEDLINE
[do] DOI:10.1638/2015-0094.1


  6 / 120 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Alves, Leucio Câmara
Texto completo
[PMID]:28363040
[Au] Autor:Borges JC; Jung LM; Santos SS; Carvalho VL; Ramos RA; Alves LC
[Ti] Título:TREATMENT OF PULMONICOLA COCHLEOTREMA INFECTION WITH IVERMECTIN-PRAZIQUANTEL COMBINATION IN AN ANTILLEAN MANATEE (TRICHECHUS MANATUS MANATUS).
[So] Source:J Zoo Wildl Med;48(1):217-219, 2017 Mar.
[Is] ISSN:1042-7260
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The aim of this study was to report the use of an oral combination of ivermectin plus praziquantel in the treatment of a Pulmonicola cochleotrema in an Antillean manatee ( Trichechus manatus manatus). A female manatee was found exhibiting respiratory changes and the presence of parasites in the nares. Based on clinical manifestations presented by the manatee, a symptomatic therapeutic protocol was employed, which included an anthelmintic treatment using a combination of ivermectin plus praziquantel. The parasites retrieved were identified as P. cochleotrema. The fourth day after the onset of the therapeutic protocol, the clinical signs declined and on the seventh day posttreatment no clinical signs were observed. This is the first time a therapeutic protocol of ivermectin plus praziquantel has been used in the treatment of P. cochleotrema in manatees.
[Mh] Termos MeSH primário: Ivermectina/uso terapêutico
Praziquantel/uso terapêutico
Trematódeos/classificação
Infecções por Trematódeos/veterinária
Trichechus manatus
[Mh] Termos MeSH secundário: Animais
Anti-Helmínticos/administração & dosagem
Anti-Helmínticos/uso terapêutico
Feminino
Ivermectina/administração & dosagem
Praziquantel/administração & dosagem
Infecções por Trematódeos/tratamento farmacológico
[Pt] Tipo de publicação:CASE REPORTS; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anthelmintics); 6490C9U457 (Praziquantel); 70288-86-7 (Ivermectin)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170619
[Lr] Data última revisão:
170619
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170401
[St] Status:MEDLINE
[do] DOI:10.1638/2016-0149.1


  7 / 120 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28194485
[Au] Autor:Gaspard JC; Bauer GB; Mann DA; Boerner K; Denum L; Frances C; Reep RL
[Ad] Endereço:Science and Conservation, Pittsburgh Zoo & PPG Aquarium, 1 Wild Place, Pittsburgh, PA, 15206, USA.
[Ti] Título:Detection of hydrodynamic stimuli by the postcranial body of Florida manatees (Trichechus manatus latirostris).
[So] Source:J Comp Physiol A Neuroethol Sens Neural Behav Physiol;203(2):111-120, 2017 Feb.
[Is] ISSN:1432-1351
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Manatees live in shallow, frequently turbid waters. The sensory means by which they navigate in these conditions are unknown. Poor visual acuity, lack of echolocation, and modest chemosensation suggest that other modalities play an important role. Rich innervation of sensory hairs that cover the entire body and enlarged somatosensory areas of the brain suggest that tactile senses are good candidates. Previous tests of detection of underwater vibratory stimuli indicated that they use passive movement of the hairs to detect particle displacements in the vicinity of a micron or less for frequencies from 10 to 150 Hz. In the current study, hydrodynamic stimuli were created by a sinusoidally oscillating sphere that generated a dipole field at frequencies from 5 to 150 Hz. Go/no-go tests of manatee postcranial mechanoreception of hydrodynamic stimuli indicated excellent sensitivity but about an order of magnitude less than the facial region. When the vibrissae were trimmed, detection thresholds were elevated, suggesting that the vibrissae were an important means by which detection occurred. Manatees were also highly accurate in two-choice directional discrimination: greater than 90% correct at all frequencies tested. We hypothesize that manatees utilize vibrissae as a three-dimensional array to detect and localize low-frequency hydrodynamic stimuli.
[Mh] Termos MeSH primário: Hidrodinâmica
Tato/fisiologia
Trichechus manatus/fisiologia
Vibração
Vibrissas/fisiologia
[Mh] Termos MeSH secundário: Animais
Florida
Masculino
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171014
[Lr] Data última revisão:
171014
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170215
[St] Status:MEDLINE
[do] DOI:10.1007/s00359-016-1142-8


  8 / 120 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
[PMID]:27901507
[Au] Autor:Smith LN; Waltzek TB; Rotstein DS; Francis-Floyd R; Walsh MT; Wellehan JF; Gerhold R; Chapman AE; de Wit M
[Ad] Endereço:Tampa's Lowry Park Zoo, 1101 W Sligh Avenue, Tampa, FL 33604, USA.
[Ti] Título:Disseminated toxoplasmosis Toxoplasma gondii in a wild Florida manatee Trichechus manatus latirostris and seroprevalence in two wild populations.
[So] Source:Dis Aquat Organ;122(1):77-83, 2016 Nov 22.
[Is] ISSN:0177-5103
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Marine mammals are important indicators for ecosystem health and serve as sentinel species for infectious agents including zoonoses. Histological examination of tissues from a stranded Florida manatee Trichechus manatus latirostris revealed protozoal cysts in the cerebrum and intrahistiocytic tachyzoites in the liver and caudal mesenteric lymph node. Disseminated Toxoplasma gondii infection was confirmed by immunohistochemistry and sequencing of the nuclear ribosomal internal transcribed spacer region of formalin-fixed tissues. The lack of baseline information on Florida manatees' exposure to this pathogen prompted a study into the seroprevalence of T. gondii in 2 separate geographic habitats in Florida, USA, during the winters from 2011-2014. Serum was collected during routine health assessments of 44 apparently healthy manatees from Crystal River (n = 26) on the west central coast of Florida and Brevard County (n = 18) on the east coast of Florida. Serum was screened for detection of T. gondii immunoglobulin G (IgG) antibodies via the modified agglutination test. Two animals from Crystal River from 2011 and 2012 (7.7%) and one animal from Brevard County from 2011 (5.6%) tested positive for T. gondii antibodies. Overall seroprevalence for T. gondii was low in the 2 sampled populations and may reflect a low seroprevalence or animal susceptibility. However, continued monitoring of this pathogen in aquatic ecosystems is warranted due to both possible anthropogenic sources and zoonotic potential.
[Mh] Termos MeSH primário: Animais Selvagens
Toxoplasma/isolamento & purificação
Toxoplasmose Animal/epidemiologia
Trichechus manatus
[Mh] Termos MeSH secundário: Animais
Feminino
Florida/epidemiologia
Masculino
Estudos Soroepidemiológicos
Toxoplasmose Animal/parasitologia
[Pt] Tipo de publicação:CASE REPORTS; JOURNAL ARTICLE
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170622
[Lr] Data última revisão:
170622
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161201
[St] Status:MEDLINE


  9 / 120 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27468012
[Au] Autor:Attademo FL; Ribeiro VO; Soares HS; Luna FO; Sousa GP; Freire AC; Gennari SM; Alves LC; Marvulo MF; Dubey JP; Silva JC
[Ti] Título:SEROPREVALENCE OF TOXOPLASMA GONDII IN CAPTIVE ANTILLEAN MANATEE (TRICHECHUS MANATUS MANATUS) IN BRAZIL.
[So] Source:J Zoo Wildl Med;47(2):423-6, 2016 Jun.
[Is] ISSN:1042-7260
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Antillean manatees ( Trichechus manatus manatus) are aquatic mammals that inhabit marine waters from Central America to the northeastern region of Brazil, and they are an endangered species. Infection with Toxoplasma gondii through intake of water or food contaminated with oocysts has been reported among marine mammals. The present study aimed to evaluate the prevalence of antibodies to T. gondii in West Indian manatees living in captivity in northeastern Brazil. Serum samples from 55 West Indian manatees from three different captive groups were tested for T. gondii antibodies by means of the modified agglutination test using a cutoff of 1:25. The samples were screened at dilutions of 1:25, 1:50, and 1:500, and positive samples were end-titrated using twofold serial dilutions; antibodies were found in six Antillean manatees (10.9%) with titers of 1:50 in three, 1:500 in one, 1:3,200 in one, and 1:51,200 in one manatee. This study is the first report of T. gondii antibodies in captive Antillean manatees in Brazil.
[Mh] Termos MeSH primário: Toxoplasma/isolamento & purificação
Toxoplasmose Animal/parasitologia
Trichechus manatus/sangue
[Mh] Termos MeSH secundário: Envelhecimento
Animais
Animais de Zoológico
Brasil/epidemiologia
Feminino
Masculino
Estudos Soroepidemiológicos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1609
[Cu] Atualização por classe:160729
[Lr] Data última revisão:
160729
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160729
[St] Status:MEDLINE
[do] DOI:10.1638/2015-0100.1


  10 / 120 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27166161
[Au] Autor:Reyes LD; Harland T; Reep RL; Sherwood CC; Jacobs B
[Ad] Endereço:Department of Anthropology and Center for the Advanced Study of Human Paleobiology, The George Washington University, Washington, D.C., USA.
[Ti] Título:Golgi Analysis of Neuron Morphology in the Presumptive Somatosensory Cortex and Visual Cortex of the Florida Manatee (Trichechus manatus latirostris).
[So] Source:Brain Behav Evol;87(2):105-16, 2016.
[Is] ISSN:1421-9743
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:The current study investigates neuron morphology in presumptive primary somatosensory (S1) and primary visual (V1) cortices of the Florida manatee (Trichechus manatus latirostris) as revealed by Golgi impregnation. Sirenians, including manatees, have an aquatic lifestyle, a large body size, and a relatively large lissencephalic brain. The present study examines neuron morphology in 3 cortical areas: in S1, dorsolateral cortex area 1 (DL1) and cluster cortex area 2 (CL2) and in V1, dorsolateral cortex area 4 (DL4). Neurons exhibited a variety of morphological types, with pyramidal neurons being the most common. The large variety of neuron types present in the manatee cortex was comparable to that seen in other eutherian mammals, except for rodents and primates, where pyramid-shaped neurons predominate. A comparison between pyramidal neurons in S1 and V1 indicated relatively greater dendritic branching in S1. Across all 3 areas, the dendritic arborization pattern of pyramidal neurons was also similar to that observed previously in the afrotherian rock hyrax, cetartiodactyls, opossums, and echidnas but did not resemble the widely bifurcated dendrites seen in the large-brained African elephant. Despite adaptations for an aquatic environment, manatees did not share specific neuron types such as tritufted and star-like neurons that have been found in cetaceans. Manatees exhibit an evolutionarily primitive pattern of cortical neuron morphology shared with most other mammals and do not appear to have neuronal specializations for an aquatic niche.
[Mh] Termos MeSH primário: Neurônios/citologia
Coloração pela Prata/métodos
Córtex Somatossensorial/citologia
Trichechus manatus/anatomia & histologia
Córtex Visual/citologia
[Mh] Termos MeSH secundário: Animais
Dendritos
Feminino
Florida
Células Piramidais/citologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170719
[Lr] Data última revisão:
170719
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160512
[St] Status:MEDLINE
[do] DOI:10.1159/000445495



página 1 de 12 ir para página                         
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde