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Development of the omasum of Nelore cattle (Bos taurus indicus) during the prenatal period | Desenvolvimento do omaso de bovinos da raça Nelore (Bos taurus indicus) durante o período pré-natal Полный текст
2013
Gabriela Mansano do Nascimento | Silvia Helena Venturoli Perri | Roberto Gameiro de Carvalho | Cristina Maria Rodrigues Monteiro
<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoNormal"><span style="mso-ansi-language: EN-US;" lang="EN-US">The development of the stomach of domestic mammals is a complex process, especially in ruminants. The aim of this study was to analyze this organ during prenatal period. Omasum samples of Nelore fetuses (Bos taurus indicus) were divided into five groups of six samples each: 1- fetuses from 9 to 15 weeks (8 to 21cm) of gestation, 2 - fetuses from 16 to 22 weeks (23 to37cm), 3 - fetuses from 23 to 29 weeks (40 to 58cm), 4 - fetuses from 30 to 36 weeks (61 to 77cm) and 5 - fetuses from 37 to43 weeks (79 to 88cm). The histological sections were stained with Hematoxyl in and Eosin and Picrossirius and examined by light microscopy. In fetuses of 11 cm it was observed mucosa with uniform primary, secondary and tertiary blades and all layers present. The fetus with 13.5 cm presented quaternary blades emergence, papillae on primary and secondary blades and formation of the muscularis mucosae. At 28 cm it were observed papillae in development, as well as the blades, especially the quaternary. In 42 cm fetuses was early epithelial keratinization and at 56 cm it was fully keratinized. In 60 cm fetuses the blades presented large papillae with tapered apex and at 65 cm there was decreased epithelium and increase of the muscle layer. In the fetus of 83 cm it were observed thin sections, discrete muscularis mucosa and papillae over the entire organ surface. It was concluded that the blades and papillae were structures that presented more changes during fetal development.</span></p> | <!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoNormal">O desenvolvimento do estômago de mamíferos domésticos é um processo complexo, especialmente em ruminantes. Essa pesquisa analisou o desenvolvimento desse órgão durante o período pré-natal. Foram utilizadas amostras de omaso de fetos da raça Nelore (Bos taurus indicus) divididos em cinco grupos com seis amostras cada: 1º – fetos com 9 a 15 semanas (8 a 21cm) de gestação, 2º – fetos com 16 a 22 semanas (23 a 37cm), 3º – fetos com 23 a 29 semanas (40 a 58cm), 4º – fetos com 30 a 36 semanas (61 a 77cm) e 5º– fetos com 37 a 43 semanas (79 a 88cm). Os cortes histológicos foram corados com Hematoxilina e Eosina e Picrossirius e examinados ao microscópio de luz. No feto de 11 cm, foi observado mucosa com lâminas primárias, secundárias e terciárias uniformes e demais camadas presentes. No feto de 13,5 cm surgiram as lâminas quaternárias, papilas nas lâminas primárias e secundárias e a formação da muscular da mucosa. Aos 28 cm, as papilas estavam em pleno desenvolvimento, assim como as lâminas, principalmente as quaternárias. No feto de 42 cm houve início de queratinização epitelial e, no de 56 cm, estava totalmente queratinizado. No feto de 60 cm, as lâminas possuíam papilas grandes e afiladas no ápice e, aos 65 cm, houve diminuição do epitélio e aumento da camada muscular. O feto de 83 cm apresentou lâminas delgadas, muscular da mucosa discreta e papilas por toda a superfície. Concluiu-se que as lâminas e papilas foram as estruturas que mais apresentaram modificações durante o desenvolvimento fetal.</p>
Показать больше [+] Меньше [-]Falha da transferência de imunidade passiva em cordeiros mestiços (Santa Inês x Dorper) e estudo do proteinograma do nascimento até o desmame | Failure of passive immunity transfer in crossbred lambs (Santa Inês x Dorper) and proteinogram study from birth until waned Полный текст
2013
Joselito Nunes Costa | Débora de Fátima Matias da Silva | Carla Caroline Valença de Lima | Thiago Sampaio de Souza | Alexandre Lôpo Araújo | Antônio Oliveira Costa Neto | Maria Angela Ornelas de Almeida
<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoNormal">Analisou-se a ocorrência da Falha de Transferência da Imunidade Passiva (FTIP) em 45 cordeiros nascidos de ovelhas saudáveis e pluríparas. Estes animais foram acompanhados do nascimento até o desmame (90 dias), por meio de avaliações físicas, do hemograma, determinação de proteínas séricas totais e seu fracionamento eletroforético entre 24-72h pós-nascimento (p.n.), aos 7, 15, 30, 60 e 90 dias de idade (quando era realizada a desmama). Adotando-se o ponto de corte para proteínas séricas totais da ordem de 4,5g/dL, obteve-se a ocorrência de FTIP de 24,4% (11 animais). Os cordeiros com FTIP apresentaram menores valores (p<0,05) de proteínas séricas, albumina, alfaglobulina, betaglobulina 1 e gamaglobulinas entre 24-72h p.n. quando comparados aos dos 34 animais que não tiveram FTIP. Porém, a partir dos sete dias de vida não foram observadas diferenças significativas destas variáveis entre os grupos, o que indica um processo de produção ativa de proteínas pelo grupo com FTIP.</p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>PT-BR</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> <w:SplitPgBreakAndParaMark/> <w:EnableOpenTypeKerning/> <w:DontFlipMirrorIndents/> <w:OverrideTableStyleHps/> </w:Compatibility> 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mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-fareast-language:EN-US;} </style> <![endif]--> | <!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoNormal"><span style="mso-ansi-language: EN-US;" lang="EN-US">It was analyzed the occurrence of the failure of passive transfer (FTIP) of the immunity 45 born lambs of healthy and pluriparous ewes. These animals were accompanied from the birth to the wean (90 days), when clinical evaluations were accomplished, hemogram, determination of total serum proteins and their electrophoretic fractions, 24-72h after the birth, to the 7, 15, 30, 60 and 90 days of age (at the same time of the wean). Adopting the cut point for total serum proteins of the order of 4.5g/dL, it was obtained the occurrence of FTIP of 24.4% (11 animals). The lambs with FTIP presented lowers values (p<0.05) of serum proteins, albumin, alpha-globulin, beta-globulin 1 and gamma globulins when compared to the 34 animals that have no FTIP. However, from 7th days of life it was not observed significant differences of these variables between groups, indicating the occurrence of a process of active production of proteins by group FTIP.</span></p>
Показать больше [+] Меньше [-]Molecular epidemiology of Listeria monocytogenes isolated from different sources in Brazil | Epidemiologia molecular de Listeria monocytogenes isoladas de diferentes fontes no Brasil Полный текст
2013
Andrea Micke Moreno | Renata Paixão | Luisa Zanolli Moreno | Débora Dirani Sena de Gobbi | Daniele Cristine Raimundo | Thais Sebastiana Porfida Ferreira | Ernesto Hofer | Maria Helena Matte | Marina Moreno
<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoNormal"><span style="mso-ansi-language: EN-US;" lang="EN-US">Listeria monocytogenes is an important foodborne pathogen that primarily affects pregnant women, neonates, the elderly and immune-compromised individuals, and it may cause abortion, septicemia, and meningitis. From the 13 capsular groups described, serotypes 4b, 1/2b and 1/2a are most closely related to human infection. For this reason, serotyping has limited value as an epidemiological tool; thus, improved discriminatory typing methods are required to enhance knowledge of L. monocytogenes contamination and infection. The aim of this study was to characterize the genetic diversity of L. monocytogenes isolates in the pork processing industry in Sao Paulo, Brazil and human infection isolates by ERICPCR and single enzyme AFLP. Serotypes 1/2c and 4b were frequent among isolates from pork and slaughterhouse/market environments, whereas serotypes 4b and 1/2a were observed among human isolates. ERIC-PCR and AFLP revealed 34 and 31 distinct profiles, respectively, which had tendencies of separation according to serogroup and isolate origin. The genetic profiles from slaughterhouse and market environments suggest the possibility of different sources of Listeria contamination in the environment, although in certain cases, continuous contamination caused by the persistence of clonal strains is also a possibility.</span></p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>PT-BR</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> <w:SplitPgBreakAndParaMark/> 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mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-fareast-language:EN-US;} </style> <![endif]--> | <!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoNormal">Listeria monocytogenes é um importante patógeno de origem alimentar que afeta principalmente grávidas, neonatos, idosos e indivíduos imunocomprometidos, e pode causar abortamento, septicemia e meningite. Dos 13 grupos capsulares descritos, os sorotipos 4b, 1/2b e 1/2a são os mais relacionados à infecção humana. Por esta razão, a sorotipagem possui valor limitado como ferramenta epidemiológica e, dessa forma, métodos mais discriminatórios são necessários para melhorar o conhecimento sobre a contaminação e a infecção por L. monocytogenes. O objetivo deste estudo foi caracterizar a diversidade genética de isolados de L. monocytogenes da indústria de processamento de carne suína no Estado de São Paulo, Brasil, e compará-los a isolados de casos de infecção humana através do ERIC-PCR e AFLP com uma única enzima. Os sorotipos 1/2c e 4b foram frequentes em carne suína e ambientes de abatedouros e mercados, enquanto os sorotipos 4b e 1/2a foram observados nos isolados de humanos. ERIC-PCR e AFLP resultaram em 34 e 31 perfis distintos, respectivamente, com uma tendência a separar de acordo com o sorogrupo e a origem do isolado. Os perfis genéticos de ambiente dos abatedouros e mercados sugerem a possibilidade de diferentes origens de contaminação por Listeria nos ambientes estudados, porém, em alguns casos, é possível que ocorra a persistência de cepas clonais causando contaminação contínua.</p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>PT-BR</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> <w:SplitPgBreakAndParaMark/> <w:EnableOpenTypeKerning/> 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Показать больше [+] Меньше [-]Similaridade genética entre APEC e cepas de Escherichia coli isoladas de Guaruba guarouba em um estudo com psitacídeos hígidos de cativeiro | Genetic similarity between APEC and Escherichia coli strains isolated from Guaruba guarouba in a survey on healthy captive psittacine birds Полный текст
2013
Fabíola Eloisa Setim Prioste | Marcos Paulo Vieira Cunha | Rodrigo Hidalgo Fricielle Teixeira | Ticiana Zwargg | Rosely Gioia Di-Chiacchio | Priscilla Anne Melville | Nilson Roberto Benites | Juliana Sinhorini | Eliana Reiko Matushima | Terezinha Knöbl
<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoNormal">O papel dos psitacídeos como reservatório de Escherichia coli patogênicas para aves (APEC) não é conhecido, mas será útil para a compreensão da interface humano-animal, uma vez que a microbiota entérica destas aves é composta por bactérias Gram-positivas. O objetivo deste estudo foi identificar a presença de APEC em fezes de Guaruba guarouba clinicamente saudáveis. Para isso, foram isoladas e analisadas E. coli presentes em fezes cloacais coletadas de 87 psitacídeos, alojados em seis zoológicos, três criatórios comerciais e um criatório conservacionista. Das 87 aves examinadas, 46 (52,87%) apresentaram E. coli nas fezes. A presença de oito genes de virulência foi determinada pela reação em cadeia pela polimerase (PCR): irp2, iucD, iss, vat, cvi/cva, tsh, astA, e papC, e 29 (63,04%) dos 46 isolados foram positivos para pelo menos um dos oito genes estudados. A frequência dos genes de virulência observada nos isolados de E. coli foi 32.6% (15/46) irp2, 26% (12/46) iucD, 19.5% iss (9/46), 17.4% vat (8/46), 17.4% cvi/cva (8/46), 8.7% tsh (4/46), 4.4% astA (2/46) e 0% papC (0/46). Os isolados foram agrupados em 13 perfis genotípicos de acordo com combinações de genes de virulência, mas apenas duas amostras foram classificadas como APEC, com o perfil iuc, iss, cvi/cva, irp + e iuc, iss, cvi/cva, irp, tsh, iuc, iss, +. Este estudo revela a presença de APEC em aves de cativeiro (G. guarouba) clinicamente saudáveis, sugerindo que estes psitacídeos possam atuar como reservatórios de micro-organismos patogênicos. Estudos epidemiológicos são necessários para determinar a relevância desta espécie como reservatório e as implicações para a conservação da espécie ameaçada G. guarouba.</p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>PT-BR</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> <w:SplitPgBreakAndParaMark/> <w:EnableOpenTypeKerning/> <w:DontFlipMirrorIndents/> <w:OverrideTableStyleHps/> </w:Compatibility> <m:mathPr> <m:mathFont 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Name="TOC Heading"/> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-fareast-language:EN-US;} </style> <![endif]--></p><p class="MsoNormal"><span style="mso-ansi-language: EN-US;" lang="EN-US">The role of psittacine birds as a reservoir of avian pathogenic Escherichia coli (APEC) is not known but would be helpful in understanding the human – animal interface, since the enteric microbiota of these birds consists of Gram positive bacteria. The aim of this study was to identify the presence of APEC in feces of clinically healthy Guaruba guarouba. To do this, we isolated and analyzed E. coli from cloacal fecal samples taken from 87 psittacine birds from six zoologic parks, three commercial breeders and one conservation breeder. Of the 87 birds examined, 46 (52.87%) presented E. coli in feces. The presence of the following eight virulence genes was determined by the polymerase chain reaction (PCR): irp2, iucD, iss, vat, cvi/cva, tsh, astA, and papC, and 29 (63.04%) of 46 E. coli isolates tested were positive at least one of the eight genes studied. The frequency of virulence genes observed in isolates of E. coli were 32.6% (15/46) irp2, 26% (12/46) iucD, 19.5% iss (9/46), 17.4% vat (8/46), 17.4% cvi/cva (8/46), 8.7% tsh (4/46), 4.4% astA (2/46) and 0% papC (0/46). The isolates were grouped in 13 genotypic profiles according to virulence gene combinations, but only 2 isolates were classified as APEC, with the pattern iuc, iss, cvi/cva, irp + and iuc, iss, cvi/cva, irp, tsh, vat +. This study reveals the presence of APEC in clinically healthy captive G. guarouba, suggesting that these psittacine birds may act as reservoir for pathogenic microorganisms. Epidemiological studies are needed to determine the relevance of this species as a reservoir and the implications for conservation of endangered species G. guarouba.</span></p>
Показать больше [+] Меньше [-]Seroepidemiology of canine leptospirosis in the metropolitan area of Natal, Rio Grande do Norte State | Soroepidemiologia da leptospirose canina na região metropolitana de Natal, estado do Rio Grande do Norte Полный текст
2013
Annielle Regina da Fonseca Fernandes | Ademilde Gomes Fernandes | Vinicius José Apropriano Araújo | Severino Silvano dos Santos Higino | Maria Luana Cristiny Rodrigues Silva | Clebert José Alves | Sérgio Santos de Azevedo
Seroepidemiology of canine leptospirosis in the metropolitan area of Natal, Rio Grande do Norte State | Soroepidemiologia da leptospirose canina na região metropolitana de Natal, estado do Rio Grande do Norte Полный текст
2013
Annielle Regina da Fonseca Fernandes | Ademilde Gomes Fernandes | Vinicius José Apropriano Araújo | Severino Silvano dos Santos Higino | Maria Luana Cristiny Rodrigues Silva | Clebert José Alves | Sérgio Santos de Azevedo
The aim of this study was to determine the frequency of dogs seropositive to anti-Leptospira spp. antibodies in Natal and metropolitan area, Rio Grande do Norte state, and to identify risk factors associated with the infection. A total of 365 blood samples were collected from dogs attended at the routine of several veterinary clinics during March to November 2011. Serological diagnosis of leptospirosis was carried out using the microscopic agglutination test (MAT) with 24 Leptospira spp. serovars as antigens. Of the 365 dogs 25 were seropositive for at least one of the Leptospira spp. serovars with frequency of 6.8%. Serovars with most frequent serological reactions were Shermani (40%), Sentot (36%) and Copenhageni (20%). The epidemiological profile of canine leptospirosis in the metropolitan region of Natal, Rio Grande do Norte state, indicates that the infection occurs in a low frequency compared with other regions, probably due to high percentage of vaccinated animals, as well as it is suggested homogenous distribution of seropositive animals in the region. Moreover, presence of rodents can be a significant risk factor since serovars maintained by these animals were identified among the most frequent. | Objetivou-se com este estudo determinar a frequência de cães soropositivos para anticorpos anti-Leptospira spp. no município de Natal e região metropolitana, estado do Rio Grande do Norte, e identificar fatores de risco associados à infecção. Foram examinadas 365 amostras de soro sanguíneo de cães atendidos na rotina de diversas clínicas veterinárias durante o período de março a novembro de 2011. O diagnóstico sorológico da leptospirose foi realizado pela técnica de soroaglutinação microscópica (SAM), utilizando-se 24 sorovares de Leptospira spp. como antígenos. Dos 365 cães, 25 foram soropositivos para pelo menos um dos sorovares de Leptospira spp., com frequência de 6,8%. Os sorovares com reações sorológicas mais frequentes foram Shermani (40%), Sentot (36%) e Copenhageni (20%). O perfil epidemiológico da leptospirose canina na região metropolitana de Natal, estado do Rio Grande do Norte, indica que a infecção ocorre com frequência baixa em comparação com outras regiões, provavelmente devido ao grande percentual de animais vacinados, bem como, sugere-se distribuição homogênea de animais soropositivos na região. Por outro lado, a presença de roedores pode ser um importante fator de risco, uma vez que sorovares mantidos por estes animais foram identificados entre os mais frequentes.
Показать больше [+] Меньше [-]Soroepidemiologia da leptospirose canina na região metropolitana de Natal, estado do Rio Grande do Norte Полный текст
2013
Annielle Regina da Fonseca Fernandes | Ademilde Gomes Fernandes | Vinicius José Apropriano Araújo | Severino Silvano dos Santos Higino | Maria Luana Cristiny Rodrigues Silva | Clebert José Alves | Sérgio Santos de Azevedo
Objetivou-se com este estudo determinar a frequência de cães soropositivos para anticorpos anti-Leptospira spp. no município de Natal e região metropolitana, estado do Rio Grande do Norte, e identificar fatores de risco associados à infecção. Foram examinadas 365 amostras de soro sanguíneo de cães atendidos na rotina de diversas clínicas veterinárias durante o período de março a novembro de 2011. O diagnóstico sorológico da leptospirose foi realizado pela técnica de soroaglutinação microscópica (SAM), utilizando-se 24 sorovares de Leptospira spp. como antígenos. Dos 365 cães, 25 foram soropositivos para pelo menos um dos sorovares de Leptospira spp., com frequência de 6,8%. Os sorovares com reações sorológicas mais frequentes foram Shermani (40%), Sentot (36%) e Copenhageni (20%). O perfil epidemiológico da leptospirose canina na região metropolitana de Natal, estado do Rio Grande do Norte, indica que a infecção ocorre com frequência baixa em comparação com outras regiões, provavelmente devido ao grande percentual de animais vacinados, bem como, sugere-se distribuição homogênea de animais soropositivos na região. Por outro lado, a presença de roedores pode ser um importante fator de risco, uma vez que sorovares mantidos por estes animais foram identificados entre os mais frequentes.
Показать больше [+] Меньше [-]Morphological patterns and malignancy criteria of transmissible venereal tumor in cytopathological and histopathological exams | Padrões morfológicos e critérios de malignidade do tumor venéreo transmissível aos exames citopatológico e histopatológico Полный текст
2013
Caroline Rocha de Oliveira Lima | Rogério Elias Rabelo | Valcinir Aloisio Scalla Vulcani | Adriana Pereira Furtado | Panmera Almeida Helrigel | Luiz Augusto Batista Brito | Veridiana Maria Brianezi Dignani de Moura
Morphological patterns and malignancy criteria of transmissible venereal tumor in cytopathological and histopathological exams | Padrões morfológicos e critérios de malignidade do tumor venéreo transmissível aos exames citopatológico e histopatológico Полный текст
2013
Caroline Rocha de Oliveira Lima | Rogério Elias Rabelo | Valcinir Aloisio Scalla Vulcani | Adriana Pereira Furtado | Panmera Almeida Helrigel | Luiz Augusto Batista Brito | Veridiana Maria Brianezi Dignani de Moura
Este estudo teve por objetivo identificar os padrões morfológicos e os critérios de malignidade do TVT aos exames citológico e histopatológico e relacionar essas características à evolução clínica e à resposta à quimioterapia. Dos animais estudados, dezesseis cães eram fêmeas e quatro machos. A idade dos animais variou entre um e dez anos de idade. Quanto à raça, 80% dos cães eram sem raça definida e 20% de outras raças. Constatou-se que as amostras citológicas permitiram melhor caracterização do tipo celular do que as histológicas. O TVT tipo plasmocitoide foi o de maior ocorrência, seguido pelos padrões linfocitoide e misto. Não houve diferença entre os escores estabelecidos para os critérios de malignidade e os tipos do TVT. Nenhum tipo morfológico do TVT diferiu quanto à resposta quimioterápica, mas o TVT apresenta particularidades morfológicas que podem interferir no comportamento tumoral, especialmente aquelas relacionadas à maior agressividade, e que são observadas no TVT plasmocitoide. | The aim of this study was to identify morphological patterns and malignancy criteria of the TVT in cytopathological and histopathological evaluations and relate these characteristics to clinical evolution and response to chemotherapy. Regarding studied animals, sixteen dogs were female and four were male. The age of the animals ranged between one and ten years old. Considering breed, 80% of the dogs were mongrel dogs and 20% were of other breeds. It was found that the cytological samples allowed a better characterization of the cell type than histological ones. The plasmacytoid was the most common morphological type of TVT, followed by the lymphocytoid and mixed standards. There was no difference among the scores for the malignancy criteria and morphological types of TVT. Regarding response to chemotherapy, no morphological type of the TVT showed any difference, but the TVT presents morphological peculiarities that may interfere with tumor behavior, especially those related to increased aggressiveness and that are observed in the plasmacytoid TVT.
Показать больше [+] Меньше [-]Padrões morfológicos e critérios de malignidade do tumor venéreo transmissível aos exames citopatológico e histopatológico Полный текст
2013
Caroline Rocha de Oliveira Lima | Rogério Elias Rabelo | Valcinir Aloisio Scalla Vulcani | Adriana Pereira Furtado | Panmera Almeida Helrigel | Luiz Augusto Batista Brito | Veridiana Maria Brianezi Dignani de Moura
Este estudo teve por objetivo identificar os padrões morfológicos e os critérios de malignidade do TVT aos exames citológico e histopatológico e relacionar essas características à evolução clínica e à resposta à quimioterapia. Dos animais estudados, dezesseis cães eram fêmeas e quatro machos. A idade dos animais variou entre um e dez anos de idade. Quanto à raça, 80% dos cães eram sem raça definida e 20% de outras raças. Constatou-se que as amostras citológicas permitiram melhor caracterização do tipo celular do que as histológicas. O TVT tipo plasmocitoide foi o de maior ocorrência, seguido pelos padrões linfocitoide e misto. Não houve diferença entre os escores estabelecidos para os critérios de malignidade e os tipos do TVT. Nenhum tipo morfológico do TVT diferiu quanto à resposta quimioterápica, mas o TVT apresenta particularidades morfológicas que podem interferir no comportamento tumoral, especialmente aquelas relacionadas à maior agressividade, e que são observadas no TVT plasmocitoide.
Показать больше [+] Меньше [-]Toxoplasma gondii em pequenos felinos silvestres neotropicais Полный текст
2013
William Alberto Cañon-Franco | Flávio Antônio Pacheco de Araújo | Solange Maria Gennari
Na ultima década, pesquisas em animais silvestres no mundo todo, tem demonstrado aspectos importantes na epidemiologia do ciclo silvestre de Toxoplasma gondii. No entanto, apesar do papel conhecido dos felinos silvestres como hospedeiros definitivos na transmissão e manutenção desse parasita, há poucos estudos sobre o envolvimento desses animais. O Brasil possui a maior quantidade de espécies de felinos silvestres do continente americano, todas em estado crítico de conservação. Porém, a detecção sorológica, pesquisas epidemiológicas e algumas caracterizações moleculares do T. gondii nestas espécies, utilizaram principalmente populações de felinos neotropicais mantidos em cativeiro, o que não reflete o comportamento da doença em condições de vida livre.Uma revisão sistemática da literatura cientifica mundial foi realizada focando a toxoplasmose em pequenos felinos neotropicais, abrangendo aspectos como o estado da pesquisa cientifica, transmissão do parasita na vida silvestre, características genéticas dos isolados e sua relação com a patogenicidade, além dos fatores de risco ligados aos conflitos com o homem. Esta revisão mostra a importância do estudo dessas populações de felinos, em função das frequentes interações com o homem em áreas peri-urbanas e a necessidade de estudos mais abrangentes, que estabeleçam a real importância do T. gondii no tangente á saúde pública e saúde animal nas regiões tropicais e temperadas.
Показать больше [+] Меньше [-]Gene expression profile of Protamines and Transition Nuclear Proteins in bovine testis Полный текст
2013
Marcia de Almeida Monteiro Melo Ferraz | Renata Simões | Flávia de Oliveira Barros | Marcella Percora Millazzoto | José Antonio Visintin | Mayra Elena Ortiz D’Ávila Assumpção
Protamines (PRM) are the major DNA-binding proteins in the sperm nucleus and can pack the DNA into less than 5% of the volume of a somatic cell nucleus. It is already known that bulls only have the PRM1 protein on mature spermatozoa while most mammals also have the PRM2. Transition nuclear proteins (Tnps) and PRMs are fundamental to DNA integrity. It has already been reported the influence of PRM on chromatin structures, generating low fertility. However, molecular mechanisms underlying these effects are not known. The relative expression of PRM1, PRM2, PRM3, Tnp1 and Tnp2 was determined by real time RT-PCR, using bovine specific primers and β-actin as endogenous control. Quantification of mRNA relative expression showed a higher expression of PRM1 compared to the other genes. The PRM3 mRNA had the lowest relative expression. A significant (p < 0.05) and positive correlation was found between PRM1 and PRM2 (r = 0.518), PRM2 and Tnp1 (r = 0.750), PRM2 and Tnp2 (r = 0.706), PRM3 and Tnp1 (r = 0.542), PRM3 and Tnp2 (r = 0.731) and between Tnp1 and Tnp2 (r = 0.820). Since most of the knowledge about protamine 2 in bovine is based on a work from 1990 and according to new studies we know that PRM1 and PRM2 are important to bull fertility, more research is needed to elucidate the real function of protamines on bovines.
Показать больше [+] Меньше [-]Exploring the effects of second estrus synchronization and dietary flushing on the incidence of ovarian cysts in gilts by using exogenous gonadotropins Полный текст
2013
Aline Campos Rosseto | Daniel Gonçalves Bruno | Simone Maria Massami Kitamura Martins | Volnei do Lago | Marcos Eduardo Pinese | Wagner Loesch Vianna | Maria Lucia Zaidan Dagli | Fabiana Fernandes Bressan | André Furugen Cesar de Andrade | Gisele Mouro Ravagnani | Mariana Andrade Torres | Aníbal de Sant’Anna Moretti
Estrus stimulation by exogenous gonadotropins (EG) in association with dietary flushing is an important tool for the improvement of gilt reproductive performance. However, there is evidence associating both flushing and EG with a disturbance in the endocrine balance that could lead to increased ovarian cysts. The aim of this study was to evaluate whether flushing or EG might affect the ovulation rate and the incidence of ovarian cysts. Seventy-one gilts were randomly distributed into 2x2 factorial design with four treatments: flushing and hormone (wFwH); no flushing and hormone (nFwH); flushing without hormone (wFnH); and neither flushing nor hormone (nFnH). Gilts were slaughtered for macroscopic and histopathological ovary examination approximately five days after AI. The characterization of these cysts was performed by optical microscopy in the following: follicular cysts (FC), luteinized cysts (LC) or cystic corpora lutea (CCL). The number of ovulations did not differ between treatments. There was no interaction between the factors in any analyzed variable. The frequency of gilts with CCL and LC was not affected by flushing and EG. No difference was found in the incidence of FC, with 12.5% and 5.88% in gilts from wFwH and nFwH treatments, respectively. There were no differences in the proportion of CCL between FC and LC (9.85 vs. 4.22 and 4.22%, respectively). In conclusion, the use of exogenous gonadotropins for second estrus synchronization in gilts, either alone or in association with dietary flushing, does not increase the incidence of ovarian cysts, nor does it decrease the ovulation rate.
Показать больше [+] Меньше [-]Prevalência e distribuição geográfica do Toxoplasma gondii em cães na área urbana de Botucatu, SP, Brasil Полный текст
2013
Veruska Maia da Costa | Rodrigo da Costa Silva | Jonas Lotufo Branti | José Rafael Módolo | Helio Langoni
Toxoplasmose é uma zoonose de distribuição mundial causada pelo Toxoplasma gondii, que pode infectar uma grande variedade de animais, inclusive seres humanos. Animais domésticos podem ser sentinelas importantes para infecções na comunidade. Ocorrência de infecção pelo T. gondii foi avaliada em cães na área urbana de Botucatu (SP, Brasil). Para amostragem, considerou-se uma taxa de erro na estimativa de 10%, um intervalo de confiança de 95% e um nível de significância de 5%. As amostras de sangue dos cães foram coletadas durante uma campanha de vacinação antirrábica e processadas usando-se o teste de aglutinação modificado (MAT). Foram coletadas 670 amostras de sangue, com distribuição homogênea em cinco regiões da área urbana, representando 3.74% dos 17.910 cães vacinados. Dessa amostra, 17,3% (116/670) dos cães, sendo 58,6% (68/116) fêmeas e 41,4% (48/116) machos, foram positivos para infecção pelo T. gondii (p<0,03). Entre os cães infectados 4,6%; (4/88) deles tinham idade menor e 95,4% (84/88) maior que um ano (p<0,01); em 28 animais positivos a idade não era conhecida Os títulos séricos de anticorpos anti-T. gondii estavam distribuídos entre 16 (69,8%; 81/116), 64 (13,8%; 16/116), 256 (15,5%; 18/116) e 1024 (0,9%; 1/116). Os animais positivos estavam distribuídos nas regiões Norte 14,2% (19/134), Sul 18,0% (31/172), Leste 15,7% (19/121), Oeste 21,6% (27/125) e Centro 16,9% (20/118) do município (p=0,5). Em todas essas regiões, fêmeas e animais com mais de um ano de idade tiveram maior taxa de positividade para a infecção (p<0.05).
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