Navegando por Assunto "Schistosoma mansoni"

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Acesso aberto (Open Access)
Esquistossomose mansônica na área metropolitana de Belém: a experiência do ambulatório do Núcleo de Medicina Tropical - UFPA
(Universidade Federal do Pará, 2003-12-23) ROJAS, Márcia de Fátima Maciel de; BICHARA, Cléa de Nazaré Carneiro; PÓVOA, Marinete Marins; http://lattes.cnpq.br/2256328599939923
Four hundred eight patients with schistosomiasis mansoni were studied. This study was carried out at the ambulatory of the Núcleo de Medicina Tropical/UFPA, in Belem city, during the period from 1997 trough 1999 (retrospectively) and from 2000 trough 2001 (prospectively). Which were divided in two groups: group I, including 105 patients from ambulatory free attendance, and group II including 303 patients tried by Fundacao Nacional de SaUde (FNS), for coproscopic investigation. The statistical analysis showed that there weren't differences between the groups into the variables studied (gender, age, procedence, occupation, educational level, load parasitic eggs, clinic forin and epidemiologic classification's case). So, in both groups we're observed the follow clinical and epidemiological profile: to be between 10 trough 19 years old, male, dwelled in the Telegrafo's district, to have load parasitic eggs, bellow of 200 eggs/g of stool, to be by student, low knowledge's level, and intestinal clinic form. The first of all the risk's factors observed were the worse conditions of residence, precarious basic sanitation, associated the low level economic social and education of population. The area's endemicity is low but it's a public health problem localized into the focal areas, reaching mainly the poor communities and a presented high autochthony. The endemicity low level in spite of migratory continues process and the planorbideos vectors's presence in the region can be justified by the Militant factors to the advanced this endemy, such as rivers's big volume, strong stream and acid pH of their waters.
Acesso aberto (Open Access)
Estudo da esquistossomose mansônica nas regionais de saúde no estado do Maranhão, 2007-2011
(Universidade Federal do Pará, 2014-06-05) FERNANDES, Orquideia da Silva; BICHARA, Cléa Nazaré Carneiro; http://lattes.cnpq.br/2161704040280760
The Schistosomiasis (MS) is a parasitic infection with a wide geographic distribution that cause important economic and public health implications. This grievance is installed in Brazil since colonial times and remains in all geographic regions, particularly in the northeastern of Brazil. This report shows to be a quantitative, descriptive observational epidemiological research approach across the board, created by active search of secondary data on the prevalence of MS in the state of Maranhão and its regional health from 2007 to 2011, based on data Historic cases reported to the Information System of the Schistosomiasis Control Program and the National Disease Notification Service. The results showed that MS is declining in Brazil, from where 2007 to 2011; most of these are concentrated in the Southeast, with xxx the study period, followed by the Northeast with xxx cases. However, in the northeast is that MS stands for stability and the southern region where there is the lowest recorded levels. The state of Maranhão accumulated more cases of MS in this period than the north, south and center-west regions. We observed two pieces of information regarding the total number of cases in the Maranhão according to base consulted, with 18,884 cases reported by SISPCE \ SINAN and 317,661 by the PCE. In this state the picture remains, but with a tendency to decline as well, focusing on cases of Maranhão marshland region. Among its 19 regional health in 15 case reports were made, predominantly in the eastern St. Louis (129,999), Bacabal (67,735), total years studied. Empress was no increase in the number of cases of 1.63 in 2009 to 10.99 in 2011, which was attributed to the acceleration of, especially migratory sociodemographic and health problems. The analysis shows that the parasitic load Maranhao remains low to medium endemicity in most cases eliminating from 1 to 4 eggs/g of faeces. Thus, this study shows that MS whilst under control in Brazil, Northeast and Maranhão, needs to be better controlled, which depends directly improving the structural conditions of life of its inhabitants.
Acesso aberto (Open Access)
O fator de crescimento neuronal na infecção por Schistosoma mansoni: estudo molecular, imunoenzimático e morfométrico em modelo permissível e não permissível à infecção
(Universidade Federal do Pará, 2013-07-03) SANTOS, Daniel Valle Vasconcelos; SILVA FILHO, Manoel da; http://lattes.cnpq.br/2032152778116209
Schistosomiasis is a tropical disease caused by Schistosoma mansoni. His occurrence affects 110 million people worldwide. The deposition of eggs of the parasite may occur - in ectopic form – in the central nervous system (CNS) which leads to the formation of granulomas with consequent production of nerve growth factor (NGF). Since several studies have demonstrated the importance of NGF in the development of visual cortical pathways, our study aimed at evaluating the possible changes in the NGF concentratons in the visual system as well as the impact of this on the pyramidal cell morphology in two animal models. The change in concentration of the nerve growth factor as well as neuronal morphology were evaluated in suscetible and non-suscetible animals (mice and rats) to infection. We used 174 rats (Hooded Lister) and 135 albino mice bred and kept in cages and fed ad libitum. These animals were infected shortly after birth, with 50 cercariae. Seventy seven rats and 73 mice were inoculated with saline and constituted the control group of the study. The infection covered a period of 48 weeks . Samples of liver and visual cortex were removed, extracted and quantified with immunoassay kit (ChemiKineTM Nerve Growth Factor (NGF) Sandwich ELISA Kit - Chemicon International). For the morphometric analysis we used the pyramidal cells of the visual cortex layer IV marked by extracelular injection of biotinylated dextran (10,000 kDa). The results were expressed as mean ± standard deviation. We used Student t test to determine statistical differences between groups. The average value of NGF found in the visual cortex of rats infected was 39.2% higher than in the control group (infected: 400.9 ± 143.1 pg/ml, control: 288 ± 31.9 pg/mL, p < 0.0001). In liver samples, the increase was 28.9% higher in the infected group (infected: 340.9 ± 103.9 pg/mL, p < 0.01, control: 264.4 ± 38.6 pg/mL). No significant increase was detected within a week of infection. Among the mice group, the increase of NGF in the visual area was 94.1% (infected: 478.4 ± 284 pg/ml, p < 0.01; control: 246.5 ± 76.8 pg/ml). In the liver of these animals the increase was 138.7% (infected: 561.8 ± 260.7 pg/mL, p < 0.01, control: 301.3 ± 134.6 pg/mL). In mice group we found significant differences in dendritic parameters evaluated. The number of dendrites was 11.41% higher in the infected group than in the control (control: 25.28 ± 5.19; infected: 28.16 ± 7.45, p < 0.05). The total length of dendrites was also affected (control: 4916.52 ± 1492.65 μm; Infected: 5460.40 ± 1214.07 μm; p < 0.05), representing an increase of 11.06%. The total area of the dendritic receptive field was increased by 12.99% (control: 29.346,69 ± 11.298,62 μm2; Infected: 33.158,20 ± 7.758,31 μm2, p < 0.05) while the area had a somatic reduction of 13.61% (control: 119.38 ± 19.68 μm2; infected: 103.13 ± 24.69 μm2, p < 0.001). When we evaluated the effects of increased NGF in rats infected we did not observe significant differences in dendritic parameters analyzed, compared to the control group, except for an increase in the area of the neuronal body of approximately 21.18% (control: 132,20 ± 28.46 μm2; infected: 160.20 ± 31.63 μm2, p < 0.00001). This work showed that the reaction production of NGF in the CNS during infection with Schistosoma mansoni occurs in greater magnitude than permissible in the model in the model impermissible. We also demonstrated that in mice the effects on neuronal morphology is dramatically affected when the body is subjected to an increase in the concentration of NGF as a result of infection by Schistosoma mansoni. Given these data, studies evaluating the potential impact of visual effects and also in cell physiology caused by schistosomiasis infection becomes necessary to assess the actual damage caused by this pathological increase of nerve growth factor in the visual pathways of mammals.