خيارات البحث
النتائج 421 - 430 من 438
Evaluation of silages from hybrid m734 of sunflower obteined in diferent cutting times using the semi-automated "in vitro" gas production technique | Avaliação das silagens de girassol (hibrido m734) obtidas em diferentes épocas de ensilagem pela técnica in vitro semi-automática de produção de gases النص الكامل
2005
Luiz Gustavo Ribeiro Pereira | Rogério Martins Maurício | Lúcio Carlos Gonçalves | Thierry Ribeiro Tomich | José Avelino Santos Rodrigues | Norberto Mario Rodriguez
The success on sunflower utilization for ensiling is dependent on the correct cutting time during growing season. The objective of this experiment was to evaluate, by using the in vitro gas production technique, "Reading Pressure Technique", the kinetic of organic matter (OM) and dry matter (DM) of silages from the sunflower hybrid M734 obtained at 100, 107, 114 and 121 days after planting. Headspace gas pressure readings were taken at 2, 4, 6, 8, 10, 12, 15, 19, 24, 30, 36, 48, 72 and 96 hours post-inoculation. An unicompartimental mathematical model was applied to describe the profiles in terms of the potential gas production, lag phase, rate of gas production and effective dry matter degradation which used 2, 5 and 8%/h rate of passages. It was observed that latter cuttings promoted the reduction on the potential of gas production for OM (162, 155, 144 and 139 mL) and DM (138, 129, 121 and 119 mL); increased of "lag phase" for OM (2,4, 2,5, 2,8 and 2,9 h) and DM (2,46, 2,54, 2,98 and 2,99 h); and reduction of rate fermentation for OM (0,023, 0,022, 0,017 and 0,017 mL/h) and DM (0,022, 0,020, 0,015 and 0,016 mL/h) respectively for 100, 107, 114 and 121 days after planting . The best cutting time for M734 hybrid were at 100 and 107 days after planting. | Para que o girassol possa ser utilizado com sucesso na forma de silagem, é necessário que se determine o ponto ideal de ensilagem. O objetivo desse experimento foi avaliar através da técnica in vitro semi-automática de produção de gases a cinética de degradação da matéria orgânica (MO) e matéria seca (MS) das silagens do híbrido M734 ensilado com 100, 107, 114 e 121 dias após o plantio. As leituras de pressão dos gases foram feitas através de um transdutor de pressão às 2, 4, 6, 8, 10, 12, 15, 19, 24, 30, 36, 48, 72, 96 h pós-inoculação. A cinética ruminal foi descrita matematicamente por meio dos parâmetros: potencial máximo de produção de gases, "lag time", taxa de produção de gases (m) e degradabilidade efetiva da MO e MS para diferentes taxas de passagem (2, 5 e 8%/h) por um modelo unicompartimental. Verificou-se que o corte da cultura em estádios mais tardios levaram a redução no potencial máximo de produção de gases para a MO (162, 155, 144 e 139 mL) e MS (138, 129, 121 e 119 mL); elevação da "lag time" para MO (2,4, 2,5, 2,8 e 2,9 h) e MS (2,5, 2,5, 3,0 e 3,0 h); e diminuição do m para a MO (0,023, 0,022, 0,017 e 0,017 mL/h) e MS (0,022, 0,020, 0,015 e 0,016 mL/h) para as épocas 100, 107, 114 e 121 dias após o plantio, respectivamente. As épocas mais indicadas para a ensilagem do híbrido M734 foram aos 100 e 107 dias após o plantio.
اظهر المزيد [+] اقل [-]Biochemical parameters for evaluation of renal function and fluid and electrolyte balance of healthy female Holstein calves during the first month of life | Parâmetros bioquímicos para avaliação da função renal e do equilíbrio hidroeletrolítico em bezerras sadias, da raça Holandesa, no primeiro mês de vida النص الكامل
2005
Fernando José Benesi | Clarisse Simões Coelho | Marta Lizandra do Rêgo Leal | Regina Mieko Sakata Mirandola | Júlio Augusto Naylor Lisbôa
Three hundred healthy female Holstein calves were used for assess the renal function and electrolyte balance throughout the first month of life. Calves were distributed through 15 experimental group, according to age. The influence of age on the biochemical values was also studied. The serum concentration of urea oscillated throughout the study, reaching the highest value on the 4th day of life (31,85 mg/dl) and reaching the lowest values on calves with 15-20 days of life. Similarly, serum creatinine had highest values on the group of youngest animals (group 1 - 2,65 mg/dl), followed by oscillations and a continuing decrease until it reached the lowest values on older animals (group 15 - 1,28 mg/dl). The sodium concentrations had few oscillations until 15 days of life when it had the lowest value (125,9 mEq/l); thereafter it was observed a significant increase with the highest value between 20th and 25th day of life (141,5 mEq/l). For the serum potassium, the lowest value was observed on younger animals (group 1 - 4,30 mEq/l), followed by a significant increase until the highest value between the 5th and 9th day of life (5,27 mEq/l). Ageing showed a significant influence on all the biochemical variables studied with exception for chloride ion concentration. | Para o estabelecimento dos valores de referência de variáveis bioquímicas utilizadas na avaliação da função renal e do equilíbrio hidroeletrolítico de bezerras sadias, da raça Holandesa, no primeiro mês de vida, utilizou-se amostras de soro sangüíneo de 300 animais, distribuídos por 15 grupos experimentais, de acordo com o tempo de vida pós-nascimento. Considerou-se na análise dos resultados a influência do fator etário. As concentrações de uréia sérica apresentaram oscilações, atingindo um valor máximo nos animais com 4 dias de vida (31,85 mg/dl), seguindo com queda significativa, alcançando a taxa mínima nos bezerros com 15 a 20 dias de vida. De forma semelhante, a taxa de creatinina sérica foi maior nos grupos de animais mais jovens (grupo 1 - 2,65 mg/dl), evoluindo com declínio progressivo até atingir valor mínimo nos animais mais velhos (grupo 15 - 1,28 mg/dl). As taxas do sódio tiveram pequenas oscilações até 15 dias de vida quando ocorreu o valor mínimo (125,9 mEq/l); a seguir houve aumento significativo com taxa máxima nos animais com 20 a 25 dias (141,5 mEq/l). Quanto ao potássio sérico, o valor mínimo foi detectado nos animais mais jovens (grupo 1 - 4,30 mEq/l), seguido por aumento significativo e até atingir o maior valor nos grupos de animais com 5 a 9 dias de vida (5,27 mEq/l). A influência do fator etário provou-se significativa para praticamente todos os constituintes bioquímicos estudados, com exceção da determinação de cloreto sérico.
اظهر المزيد [+] اقل [-]Biological and immunological studies of five Brazilian rabies virus isolates | Estudos biológicos e imunológicos de cinco amostras brasileiras do vírus da raiva النص الكامل
2005
Fernanda Bernardi | Antonio Albério de Barros Gomes | Fumio Honmai Ito | Leonardo José Richtzenhain | Rodrigo Martins Soares | Marcos Bryan Heinemann | Adriana Cortez | Sidney Mioshy Sakamoto | Paulo César Maiorka
Aspects of biological behavior of Brazilian rabies virus isolated from canine, bovine, equine, vampire and insectivorous bats were studied in mice. The oral infection occurred in mice fed with infected brain of insectivours bat (8.82%), canine (8.57%) and equine (3.03%). The mean period of incubation to all the isolates was 6 days after mice intracerebral inoculation, however, symptoms were variable, since hyperexcitability (canine sample), progressive paralysis of lower limbs and prolonged clinical course until death (equine sample), and mice without clinical signs before death (insectivorous bat). By immunohistochemistry IFN was detected in brains of mice inoculated with bovine and insectivorous bat samples, TNF and iNOS were detected in brains of those inoculated with insectivorous bat, bovine and canine samples, and positive GFAP astrocytes were found in all five samples. Two commercial inactivated rabies vaccines, one imported (vaccine 1) and another manufactured in Brazil (vaccine 2) were compared to evaluate their efficacy to protect against experimental rabies infection in mice, through the NIH and the CDC potency tests, using these street isolates as challenge virus. There was no statistical significant difference between the efficaccy of both vaccines, when comparing the same potency test and challenge virus strain suggesting no need to produce specific vaccines with street isolates. | Estudou-se em camundongos aspectos do comportamento biológico de amostras brasileiras de virus rábico isoladas de cão, bovino, eqüino, morcegos hematófago e insetívoro. Observou-se transmissão oral em camundongos alimentados com cérebros infectados de morcego insetívoro (8,82%), cão (8,57%) e eqüino (3,03%). O período de incubação médio para todas as amostras foi de 6 dias após a inoculação intracerebral, com sintomas variando, desde hiperexitabilidade (amostra canina), paralisia progressiva principalmente de membros posteriores e maior duração do curso clínico até a morte (eqüino) e morte repentina, sem sintomas aparentes (morcego insetívoro). Pela imunoistoquímica detectou-se produção de IFN nos cérebros dos camundongos inoculados com amostra de bovino e morcego insetívoro, TNF e iNOS nos animais infectados com amostra de cão, bovino e morcego insetívoro e reação astrocitária com aumento da expressão de GFAP em todas as cinco amostras. A eficácia de 2 vacinas comerciais inativadas, uma nacional e outra importada, para a proteção contra a infecção experimental em camundongos foi avaliada através dos testes NIH e CDC, usando as amostras de campo para o desafio. Não houve diferença significativa entre o desempenho das vacinas, quando comparadas para um mesmo teste de potência e amostra de desafio sugerindo que não há necessidade de se produzir vacinas com amostras isoladas de campo.
اظهر المزيد [+] اقل [-]Enzootic bovine leukosis: prevalence of seric antibodies on dairy cows breed at Bahia and comparison between results of ELISA tests and ágar gel immunodiffusion tests | Leucose enzoótica dos bovinos: prevalência de anticorpos séricos em bovinos criados na Bahia e comparação entre os resultados do teste de ELISA e da imunodifusão em gel de ágar النص الكامل
2005
Paulo Ferreira de Matos | Eduardo Harry Birgel Júnior | Eduardo Harry Birgel
The prevalence of infection by the Enzootic Bovine Leukosis virus was determined in dairy cows breed in five micro-regions of Bahia State, comparing the efficiency of three serodiagnostic tests for the detection of antibodies anti Enzootic Bovine Leukosis virus: ELISA test, AGID Immunodiffusion test / gp 51 from foreign origin and AGID Immunodiffusion test / gp 51 produced by the Institute of Technology of Paraná - TECPAR. Seven hundred and ninety-six dairy cattle , from 13 bovine flocks were used. The infection for VLB was detected in every flock, with an prevalence of 41,0%, showing an individual flock value variation between 6,3% (4/64) and 65,8% (25/38). The animals were stratified in six age groups: a) 2 - 6 months; b) 7 - 12 months; c) 13 - 24 months; d) 25 - 48 months; e) 49 - 72 months; f) more than 72 months of age, observing that the indexes of infection in the mentioned groups were 8,8%; 16,9%; 17,7%; 50,8%; 54,4% and 56,5% respectively, showing these indexes increased significantly with age. Were used 434 serum samples were used to evaluate the comparative efficiency of the three serodiagnostic tests, considering ELISA as the standard test. In the comparison between ELISA and IDGA test with antigen of foreign origin, were found a sensibility of 85% and specificity of 80%; a positive predictive value (PPV) of 63% and a negative predictive value (NPV) of 93%, with an agreement index of 81%. Comparatively to the ELISA results, IDGA test with antigen of national origin presented a sensibility of 82%, specificity of 93%, PPV of 79% and NPV of 93%, with an agreement index of 85%. The overall results of these studies suggest that IDGA test with antigen of national origin is sufficiently efficient to its use. | Determinou-se a prevalência de infecção pelo vírus da Leucose Enzoótica dos Bovinos (LEB) em animais criados na bacia leiteira de cinco micro-regiões do Estado da Bahia, comparando a eficiência de três provas sorológicas para detecção de anticorpos anti-Vírus da LEB: Teste ELISA, prova de Imunodifusão IDGA / gp 51 importado e a IDGA / gp 51 produzido pelo Instituto de Tecnologia do Paraná - TECPAR. Foram utilizados bovinos de 13 propriedades, totalizando 796 animais. A infecção pelo VLB foi detectada em todos os rebanhos, com taxa de prevalência de 41,0%, com variação de 6,3% (4/64) a 65,8% (25/38). Os bovinos foram estratificados em seis grupos etários: a) de dois a seis meses; b) de 7 a 12 meses; c) de 13 a 24 meses; d) entre 25 e 48 meses; e) de 49 a 72 meses; f) com mais de 72 meses de idade, observando-se que os índices de infecção aumentaram significativamente com o desenvolvimento etário e os resultados foram, respectivamente: 8,8%; 16,9%; 17,7%; 50,8%; 54,4% e 56,5%. Em 434 amostras avaliou-se comparativamente a eficiência das três provas sorológicas, considerando-se o Teste ELISA como padrão. Na comparação entre a prova ELISA e o Teste de IDGA / gp 51 importado a sensibilidade foi de 85% e especificidade de 80%, com valor preditivo positivo (VPP) de 63% e o valor preditivo negativo (VPN) de 93%, sendo a concordância igual a 81%. O estudo comparativo do teste ELISA e IDGA / gp 51 - TECPAR apresentou sensibilidade igual a 82% e a especificidade 93%, com VPP de associação igual a 79% e o VPN de 93% , sendo a concordância igual a 85%. Os resultados dos estudos comparativos sugerem IDGA com antígeno de procedência nacional suficientemente eficiente para a sua utilização.
اظهر المزيد [+] اقل [-]Vigilância Epidemiológica da presença do vírus da raiva a partir do exame de imunofluorescência direta aplicada ao tecido cerebral de uma amostra da população canina do município de Mogi-Guaçu, SP, Brasil: ensaio probabilístico a partir de série histórica de 1989 a 1999 | Epidemiologic surveillance of the rabies virus using the brain immunoflorescence test on a sample of a canine population: probality and analysis with actual cases from Mogi-Guaçu, SP, Brazil, During the 1989-1999 period النص الكامل
2005
Haroldo de Barros Ferreira Pinto | Omar Miguel | Alair Assis
Foi analisada a validade do exame laboratorial sistemático do sistema nervoso de uma amostra da população canina de uma dada área, como estratégia destinada a vigilância epidemiológica da circulação do vírus da raiva. Foi empregado o banco de dados do município de Mogi-Guacú, SP, Brasil, referente a série histórica compreendida entre janeiro de 1989 a dezembro de 1999. Neste período foram examinados 1167 animais dos quais 130 (11,2%) foram positivos ao teste de imunofluorescência aplicada a raiva. O tamanho da amostra para a detecção de pelo menos um animal positivo foi calculado pela fórmula n = {1-(1-±)1/d} (N - d/2) + 1. No período de 1989 a 1994 o tamanho da amostra foi calculado a partir do número real de casos registrados. Nos anos de 1995 a 1999 como não houve novos casos de raiva canina, a análise considerou hipoteticamente a presença de um caso confirmado. Também foi efetuada a simulação do número de casos de raiva que deveriam ocorrer para que a amostra efetivamente utilizada pelo Serviço de controle da raiva fosse capaz de revelar a presença de pelo menos um animal positivo. Os resultados obtidos demonstraram que no período de 1989 a 1994 em que a freqüência anual de casos de raiva canina variou de 5 a 75 o tamanho das amostras ideal seria de 12.400 a 12.922; já no período de 1995 a 1999, em que não foram diagnosticados casos de raiva canina, se ocorresse pelo menos um registro, o tamanho da amostra seria de 13.257 a 14.698. Do exposto depreende-se que em termos probabilísticos, a estratégia proposta não é indicada para a vigilância epidemiológica da presença do vírus da raiva, quando em situação de controle, pois o número de animais a serem examinados é inviável para situações concretas. | The validty of a systematic laboratory exam that consists in examining the nervous system of a canine population sample in a given area was anlyzed, as a proper strategy for epidemiological survilance of the rabies virus presence. The analysis was based on the databank of the County of Mogi-Guaçu, SP, Brazil, referring to the historical period between January 1989 and december 1999. During this period 1,167 animals were examined and an immunofluorescence test applied to rabies showed that 130 animals (11.2%) were positive. The sample size for detecting at least one positive animal was calculated by using the formula n = {1-(1-±)1/d } (N - d/2} + 1. Between 1989 and 1994 the size of sample was calculated based on the real number of recorded cases. Between 1995 and 1999, as there were no new cases of canine rabies, the analysis considered a hypothetical presence of a confirmed case. It was also carried out a simulation of the number of rabies cases that should occur so that the sample effectively used by the Rabies Control Service would be able to reveal the presence of at least one positive animal. Results showed that in the period from 1989 to 1994, in when the annual frequecy of canine rabies cases varied from 5 to 75 cases, the ideal size of sample should be from 12,400 to 12,922. In the period from 1995 to 1999, when no canine rabies cases were recorded, the sample size would be from 13,257 to 14,698 if at least one case occurred. Thus, one can understand that in therms of probability, the proposed strategy is not recommended for the epidemiological survilance of rabies virus presence, since the number of animal to be examined is not feasible in real situation.
اظهر المزيد [+] اقل [-]Eliminação de oocistos de Cryptosporidium parvum por ovelhas e cordeiros confinados | Patterns of shedding of cryptosporidial oocysts by ewes and lambs kept indoors النص الكامل
2005
Renata Elisa Green | Alessandro Francisco Talamini do Amarante | Luciene Maura Mascarini
Este experimento foi realizado com o objetivo de determinar a variação na eliminação de oocistos de Cryptosporidium parvum nas fezes de cordeiros e ovelhas, mantidos confinados do nascimento a desmama, em uma criação localizada em Botucatu -SP. Um grupo de 20 ovelhas da raça Ile de France em final de gestação foi confinado em instalações com piso de concreto. O piso era lavado três vezes por semana e as fezes eram removidas diariamente. O nascimento dos cordeiros ocorreu em Agosto e Setembro/2001. Amostras de fezes foram colhidas das ovelhas e dos cordeiros no dia do nascimento, 4, 8, 16, 32 e 64 dias pós-parto. As amostras foram processadas pela técnica de centrífugo-sedimentação em éter. Esfregaços foram confeccionados e corados com auramina O e pela técnica de Ziehl-Neelsen modificada. Do total de amostras de cordeiros e ovelhas, 26,7% e 31,9%, respectivamente (P>;0,05) apresentaram oocistos de Crypostosporidium. Quatro dos 20 cordeiros e duas das 20 ovelhas não apresentaram oocistos em nenhuma das amostras examinadas. O percentual mais alto de amostras positivas ocorreu nas amostras dos cordeiros com quatro dias de vida. Nas ovelhas o maior percentual de amostras positivas foi registrado quatro dias após o parto. Apesar da taxa relativamente elevada de animais que eliminaram oocistos nas fezes, a infecção por C. parvum foi subclínica nas ovelhas e nos cordeiros. | This study was carried out to determine the pattern of shedding of cryptosporidial oocysts by lambs and their dams kept indoors from lambing to weaning in Botucatu, São Paulo State, Brazil. A group of 20 Ile de France ewes in late pregnancy was housed in a facility with concrete floor. The concrete floor was cleaned daily and vigorously washed three times per week. Lambing occurred in August and September/2001. Fecal samples were taken from ewes and lambs on the day of the lambing, 4, 8, 16, 32 and 64 days after lambing. Samples were processed using a centrifuge-sedimentation technique in ether. Fecal smears were stained with auramine O and by Ziehl-Neelsen modified technique. The overall percentages of fecal samples of lambs and ewes positives for Crypostosporidium oocysts were 26.7% and 31.9%, respectively (P>;0.05). Four of the 20 lambs and two of the 20 ewes did not shed oocysts in any of the faecal samples examined. The highest percentage of positive samples occurred in 4-day-old lambs. In ewes a peak in the percentage of positive samples occurred 4 days after lambing. Despite the relative high rate of animal shedding oocysts in feces, the cryptosporidial infection was asymptomatic in all ewes and lambs.
اظهر المزيد [+] اقل [-]The evaluation of anesthetic associations: atropine/s-ketamine/xylazine and acepromazine/ketamine-s/midazolam in domestic felines (Felis domestica) | Avaliação das associações anestésicas: atropina/cetamina-s/xilazina e acepromazina/cetamina-s/midazolam em felinos domésticos (Felis domestica) النص الكامل
2005
Marco César Batista de Morais | Valéria Veras de Paula | Raimundo Barrêto Alves Júnior
With the purpose to evaluate the anesthetic associations of atropine/s-ketamine/xylazine and acepromazine/s-ketamine/midazolam in domestic felines (Felis catus), 16 healthy males felines, submitted by their owners, were used. The animals were assisted at the Veterinary Hospital of the Superior School of Agriculture of Mossoró. The felines were distributed randomly into two groups, each one with eight animals, where a different anesthetic treatment was used. Group I was pretreated with atropine sulfate (0.044mg/kg) by a subcutaneous way, and elapsed 15 minutes, received xilazine (1.0mg/kg) associated with the s-ketamine (10mg/kg) through the intramuscular way. In the Group II, acepromazine (0.2 mg/kg) was used and after 15 minutes it was administered an association of midazolam (0.5mg/kg) and s-ketamine (10mg/kg), through the intramuscular way. Physiologic variables as: heart frequency, breathing frequency, saturation of oxygen and time of capillary completion, were appraised. The gauging of the variables was accomplished every 10 minutes, during 90 minutes. The periods of latency and analgesia as well the recovery were also evaluated. In the Group I, the mean of the latency period, after atropine/s-ketamine/xilazine administration was of 3.68min, while with the acepromazine/s-ketamine/midazolam it was of 3.95min. In the Group I, the average of the analgesia time was of 45.94min, and in the Group II the analgesia was determined in just one animal. The average of the recovery time in the Group I was of 134.08min and in the Group II, 78.28min. It was concluded that the association of atropine/s-ketamine/xilazine, produces an anesthesia of good quality in small surgical procedures, while the association acepromazine/s-ketamine/midazolam should be used for ambulatory small procedures. Both associations' present pharmacological properties comparable with those obtained with the racemic ketamine. | Com o objetivo de avaliar as associações anestésicas atropina/cetamina-s/xilazina e acepromazina/cetamina-s/midazolam em felinos domésticos (Felis catus), foram utilizados 16 felinos, machos, hígidos cedidos por proprietários atendidos no Hospital Veterinário da Escola Superior de Agricultura de Mossoró. Os animais foram distribuídos aleatoriamente em dois grupos de oito animais, onde foi utilizado um tratamento anestésico distinto para cada grupo. O grupo I, foi pré-tratado com sulfato de atropina (0,044mg/kg) por via subcutânea, e decorridos 15 minutos, recebeu xilazina (1,0 mg/kg) associada a cetamina-s (10mg/kg) por via intramuscular. No grupo II, foi utilizada acepromazina (0,2 mg/kg) por via intramuscular e após 15 minutos, administrou-se a associação de midazolam (0,5mg/kg) e cetamina-s (10 mg/kg) por via intramuscular. Foram avaliadas as variáveis fisiológicas: freqüência cardíaca, freqüência respiratória, saturação de oxigênio e tempo de preenchimento capilar. A aferição das variáveis foi realizada a cada 10 minutos, durante 90 minutos. Também foi avaliado o período de latência, período de analgesia e de recuperação. A média do período de latência após a administração de atropina/cetamina-s/xilazina foi de 3,68min, enquanto na acepromazina/cetamina-s/midazolam foi de 3,95 min. No grupo I, a média do tempo de analgesia foi de 45,94min, e no grupo II foi obtida analgesia em apenas um animal. A média do tempo de recuperação no grupo I foi de 134, 08min e no grupo II, 78,28min. Concluiu-se que a associação atropina/cetamina-s/xilazina, produz uma anestesia de boa qualidade para pequenos procedimentos cirúrgicos, enquanto que a associação acepromazina/cetamina-s/midazolam deve ser utilizada para pequenos procedimentos ambulatoriais. Ambas associações apresentam propriedades farmacológicas comparáveis com as obtidas com a cetamina racêmica.
اظهر المزيد [+] اقل [-]Cytokine detection at the site of l.(l.) Amazonensis subcutaneous inoculation in mice depleted of Natural Killer cells | Detecção de citocinas no sítio de inoculação subcutânea de Leishmania (Leishmania) amazonensis em camundongos depletados de células Natural Killer النص الكامل
2005
Márcia Dalastra Laurenti | Andres Örn | Idércio Luiz Sinhorini | Carlos Eduardo Pereira Corbett
<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG /> </o:OfficeDocumentSettings> </xml><![endif]--> <p class="MsoNormal" style="text-align: justify;"><span style="mso-ansi-language: EN-US;" lang="EN-US">BALBI c mice depleted and non-depleted of Natural Killer (NK) cells were infected subcutaneously with 10<sup>7</sup> stationary phase promastigotes of Leishmania (Leishmania) amazonensis and samples were taken at 24 hours and 7 days after infection. In NK cell-depleted mice, the NK cytotoxic activity of spleen cells decreased at 7 days after infection and more parasites were found in the lesion. The NK cell populations were analyzed by immunohistochemistry in spleen cryosections. An increase of NK1.1<sup>+</sup> expression and a decrease of NK5E6<sup>+</sup> antigen expression was observed in NK cell-depleted mice compared to non-depleted mice. When the presence of IFN-g, IL-12 and IL-4 at the site of parasite inoculation was analyzed by immunohistochemistry, a large amount of cytokines was detected in K cell-depleted mice at 24 hours and 7 days after infection. In non-depleted mice, there was a small amount of IL-12 at 24 hours and of IL-4 at 7 days after infection. These data cells suggest that K cell depletion by 90Srresults in increased parasitism in the lesion. The increase of NK1.1<sup>+</sup> expression, which mainly produces IL-4, may take part in the progression of the infection.</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 /> <w:EnableOpenTypeKerning /> <w:DontFlipMirrorIndents /> <w:OverrideTableStyleHps /> </w:Compatibility> <m:mathPr> <m:mathFont m:val="Cambria Math" /> 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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" style="text-align: justify;">Camundongos BALB/ c depletados e não depletados em células Natural IVller (NK) foram infectados subcutaneamente com 10<sup>7</sup> promastigotas de Leishmania (Leishmania) amazonensis em fase estacionária de crescimento e amostras foram colhidas às 24 horas e 7 dias de infecção. Nos camundongos depletados em células NK, a atividade citotóxica NK de células esplênicas estava diminuída aos 7 dias de infecção e mais parasitos foram encontrados na lesão. Populações de células NK foram analisadas por imuno-histoquimica em cortes congelados de baço. Foi observado aumento na expressão de células NK1.1<sup>+ </sup>e diminuição na expressão do antígeno NK5E6<sup>+</sup> nos animais depletados em células NK comparados aos camundongos não depletados. A presença de IFN-g, IL-12 e IL-4, analisada por imunohistoquimica no sítio de inoculação dos parasitos, mostrou que maior quantidade de citocinas foram detectadas nos camundongos depletados em células NK às 24 horas e 7 dias depois da infecção. Nos camundongos não depletados, havia pequenas quantidades de IL-12 às 24 horas e de IL-4 aos 7 dias de infecção. Estes dados sugerem que a depleção de células NK por <sup>90</sup>Sr resulta em aumento de parasitismo na lesão. O aumento na expressão de células NK1.1<sup>+</sup>, as quais produzem principalmente IL-4, pode representar um dos mecanismos que colaborariam para a progressão da infecção.</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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اظهر المزيد [+] اقل [-]Morphological aspects of the uterine tube in agouti (Dasyprocta aguti, Mammalia: Rodentia) | Aspectos morfológicos da tuba uterina de cutias (Dasyprocta aguti, Mammalia: Rodentia) النص الكامل
2005
Eunice Anita de Moura Fortes | Maria Acelina Martins de Carvalho | Mônica Marcos de Almeida | Aírton Mendes Conde Júnior | Nádia Expedita de Almeida Cruz | Antônio Chaves de Assis-Neto
It was analysed the uterine tube structure in Agouti. We have used three adult females, caming from Wild Animals Preservation and Study Nucleous of "Universidade Federal do Piauí". Soon after anaesthesia and euthanasia we got collected uterine tube fragments from cranial, medial and caudal regions. The cuts of 3 to 5m were stained with HE, and analysed and photographed with a light microscope. We could observed that the uterine tubes have three distincts stratums: mucous membrane, muscular and serous with histologicals differences that characterize the infundibulum, ampulla and isthmus regions. The uterine tube light is irregular, on cranial and medium portions. It is bigger and irregular than caudal portion. The mucous membrane is coat with simple columnar epithelium with ciliar and nonciliar cells. The own lamina, formed of slack conjunctive tissue, without glands, on ampulla region, become small and we can observe many cells. On isthmus mucous we observe ephithelial tissue with low cells. The muscular, constituted of smooth fibres, that is observed like a circular and longitudinal stratum, and the serous stratum full of vessels. Histologically, the uterine tube in Agouti is similar to the others domestic and wild animals. | Foi analisada a estrutura da tuba uterina de cutias utilizando-se três fêmeas adultas, oriundas do Núcleo de Estudos e Preservação de Animais Silvestres da Universidade Federal do Piauí. Após anestesia, foi realizada a eutanásia dos animais, em seguida, obtidos fragmentos da tuba uterina correspondentes às regiões cranial, média e caudal. Cortes de 3 a 5m de espessura foram corados pela Hematoxilina/Eosina e analisados e fotografados ao microscópio de luz. Foi evidenciado que, a parede da tuba uterina da cutia apresenta três camadas histologicamente distintas: mucosa, muscular e serosa, caracterizando as regiões infundíbulo, ampola e istmo. A mucosa, revestida por tecido epitelial simples colunar apresentando células ciliadas e não ciliadas, e, com grande quantidade de pregas em diferentes níveis. No epitélio de revestimento da mucosa do istmo, foram observadas áreas com células variando de cúbicas a pavimentosas. A luz do órgão, nas porções cranial e média, mostra-se bem maior e mais irregular que na porção caudal. A lâmina própria, constituída de tecido conjuntivo frouxo, desprovida de glândulas, e na região da ampola, torna-se mais estreita e bastante celularizada. A camada muscular, formada por fibras musculares lisas dispostas em uma subcamada circular interna e outra longitudinal externa. A serosa mostra-se bastante vascularizada. As tubas uterinas da cutia guardam muita semelhança com as dos demais mamíferos quanto aos aspectos microscópicos.
اظهر المزيد [+] اقل [-]Canine and feline scabies in São Paulo - Brazil - Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (1984-2002) | Levantamento retrospectivo de casos de escabiose canina e felina, atendidos na Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, no período compreendido entre 1984 e 2002 النص الكامل
2005
Rita de Cássia Carmona Castro | Luiz Eduardo Bagini Lucarts | Ericka Homman Delayte | Mary Otsuka | Pedro Manuel Leal Germano | Carlos Eduardo Larsson
At the Veterinary Teaching Hospital (HOVET) in FMVZ/USP, sarcoptic and notoedric mange are the second and the third most commonly diagnosed parasitic skin diseases, respectively. Between 1984 and 2002, 2907 cases of canine and feline scabies were diagnosed at HOVET. Canine scabies (2283) and feline scabies (624) represented 6.4% and 15.7%, respectively, of the cases seen. Feline scabies was more frequent than canine scabies (p<0.05 ). Canine scabies was more prevalent in pure breeds dogs (58.0%) with long hair (74.2%) and the most commonly affected dog breeds were: Poodle, Cocker Spaniel and German Shepherds. Canine and feline scabies were more frequent in males. Dogs (54.7%) and cats (63.5%) < 12 months old were the most affected. For notoedric mange stray cats, short-haired (74.2%) were most commonly affected. Feline scabies was most common in Siamese , Persian and Burmese cat breed. There was no seasonal difference in the occurence of scabies in either cats or dogs when results were analysed. | Em levantamento retrospectivo de 19 anos (1984-2002), envolvendo a totalidade de 39524 casos dermatopáticos, de caninos e felinos, atendidos no Serviço de Dermatologia do VCM-HOVET/FMVZ-USP, identificou-se um total de 2907 (7,3%) casos de escabiose. Respectivamente, 2283 (78,5%) e 624 (21,5%) animais, eram das espécies canina e felina. A frequência de ocorrência da sarna sarcóptica (6,4%) foi inferior àquela da sarna notoédrica (15,7%), esta última, duas e meia vezes mais freqüente que a congênere canina, sendo tal diferença significativa (p<0,05). Relativamente, à predisposição sexual, os machos apresentaram maior suscetibilidade à infecção do que as fêmeas, em ambas as espécies. Quando da comparação dos sexos, entre caninos e felinos, observou-se que os animais da espécie felina são os atingidos com maior freqüência pela escabiose (p<0,05). Ao se considerar a predisposição racial, apenas na espécie canina, constatou-se maior tendência de acometimento de animais de raça definida (58,0%). As raças caninas (Poodle, Cocker Spaniel e Pastor Alemão) de pelame longo (74,2%) e felina (Siamês) de pelo curto (81,3%) foram as mais acometidas (p<0,05). Animais com faixa etária inferior a um ano foram aqueles mais freqüentemente infectados (caninos 54,7%, felinos 63,5%) e dentre estes, foram os felinos os mais atingidos (p<0,05). Não houve influência sazonal na ocorrência de escabiose, canina e felina.
اظهر المزيد [+] اقل [-]