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| Registros recuperados: 316 | |
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| Fonseca,Belchiolina Beatriz; Soncini,Ricardo Alfredo; Gimarães,Adelia Rodrigues; Rossi,Daise Aparecida. |
| Campylobacter sp is a microaerophilic, thermotolerating Gram negative bacterium, known to be one of the main causes of food-borne human infections. Among the foods that carry these microorganisms, the chicken is outstanding. In Brazil, a large chicken exporting country, few researches are conducted about their prevalence in breeder hens and the transmission through eggs. The aim of this research was to verify the presence of Campylobacter sp in the shells and within the eggs from positive cloacal swab breeder hens. Microbiological analyses were made on cloacal swabs of 140 weighed breeder hens. The positive breeder hens were set aside and in a total of 244 of their eggs, Campylobacter sp was present in macerated shells and yolk contents during 7 weeks. Out... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Campylobacter; Eggs; Chicken; Vertical transmission; Epidemiology. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400032 |
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| Lü,Hui; Yuan,Yuqi; Sun,Na; Bi,Zhenwang; Guan,Bing; Shao,Kun; Wang,Tongzhan; Bi,Zhenqiang. |
| Abstract Cholera continues to be a serious public health issue in developing countries. We analyzed the epidemiological data of cholera from 1976 to 2013 in Shandong Province, an eastern coastal area of China. A total of 250 Vibrio cholerae isolates were selected for PCR analysis of virulence genes and pulsed-field gel electrophoresis (PFGE). The analysis of the virulence genes showed that the positive rates for tcpA and tcpI were the highest among strains from the southwest region, which had the highest incidence rate of cholera. Low positive rates for tcpA, tcpI and ctxAB among isolates from after 2000 may be an influencing factor contributing to the contemporary decline in cholera incidence rates. Spatiotemporal serotype shifts (Ogawa, Inaba, Ogawa,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vibrio cholerae; Epidemiology; PFGE; Virulence genes. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000100173 |
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| Giolo,Marcel Padovani; Oliveira,Christiane Minervino de; Bertolini,Dennis Armando; Lonardoni,Maria Valdrinez Campana; Gouveia,Matheus Sampaio; Netto,Daisy Pontes; Nixdorf,Suzana Lucy; Machinski Junior,Miguel. |
| Exposure to aflatoxins (AFs) in the diet may favour the development of hepatocellular carcinoma (HCC) and the acute exacerbation of hepatitis in chronic hepatitis B virus (HBV) carriers. Measurement of biomarkers such as aflatoxin M1 (AFM1), a metabolite of aflatoxin B1 (AFB1), in urine allows for the assessment of populations exposed to aflatoxins. The aim of this study was to investigate the occurrence of aflatoxin M1 in the urine of HBV carrier and non-carrier patients. One group included 43 randomly selected HBV carriers treated at two hospitals in the city of Maringa, Brazil, from March to June 2008. Control group consisted of 29 healthy adult volunteers with anti-HBs positive and HBsAg negative test results. Detection of AFM1 was performed by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aflatoxins; Biomarkers; Hepatitis B; Hepatocellular carcinoma; Urina/análise toxicológica; Epidemiology. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502012000300011 |
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| Caleffi-Ferracioli,Katiany Rizzieri; Baldin,Vanessa Pietrowski; Noguti,Érika Noda; Siqueira,Vera Lucia Dias; Scodro,Regiane Bertin Lima; Pavan,Fernando Rogério; Hirata,Mario Hiroyuki; Cardoso,Rosilene Fressatti. |
| Tuberculosis (TB) is an infectious disease in which the molecular typing methods allow to have important information about the dynamics of transmission and to assist properly in disease control. Although the ERIC-PCR (Enterobacterial repetitive intergenic consensus-PCR) assay is fast and easy to perform, scarce studies have reported its use in epidemiological studies in TB outbreaks. In this study, we aimed to genotype Mycobacterium tuberculosis and M. bovis isolates by ERIC-PCR and compare its discriminatory power with two other classically used methods: 12 loci-MIRU (Mycobacterial Interspersed Repetitive Units) and Spoligotyping. The M. tuberculosis isolates studied were from northwestern and southwestern and M. bovis from northwestern Parana, Brazil.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tuberculosis; Molecular characterization; ERIC-PCR; Epidemiology. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000300616 |
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| Tollenaar,Huib. |
| To study the over-summering of wheat stripe rust (Puccinia striiformis f.sp. tritici) in the California Central Valley (CCV), temperature records from various locations in the CCV during the period 1950-2009 were examined for the occurrence of lethal maximum temperatures for the uredinia and uredinio-mycelium of this fungus. The lethal upper threshold temperature for the uredinial stage of P.s. tritici, estimated to be 40.5 °C on the basis of data published elsewhere, and the sum, accumulated during ten consecutive days, of the respective lethal temperature quotients (ALTQio), accounting for the partial lethal effect of the daily ambient temperatures between 30 and 40.5 °C on the uredinial stage of P.s. tritici, were used as yardsticks for thermal... |
| Tipo: Journal article |
Palavras-chave: Yellow rust; Epidemiology; Lethal temperature; Triticum aestivum. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000400005 |
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| Latorre,Bernardo A; Elfar,Karina; Ferrada,Enrique E. |
| Gray mold (GM) caused by Botrytis cinerea is a major disease of grapes (Vitis vinifera) that substantially reduces the yield and quality of grape production in temperate and humid regions of the world. B. cinerea is a necrotrophic fungus that attacks the non-lignified aerial organs of grapes; in particular, berries are highly susceptible during ripening. The polycyclic nature and exponential progress exhibited by GM at the beginning of the its epidemic, as well as the abundant inoculum production, the high dissemination efficiency, the wide host range and the high genetic variability of B. cinerea, explain the difficulties encountered in attempting to control GM. At present, integrated disease management, including cultural and chemical control, is the... |
| Tipo: Journal article |
Palavras-chave: Botryotinia fuckeliana; Bunch rot; Epidemiology; Fungicides; Necrotroph; Vitis vinifera. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000300001 |
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| Angeli,Sthela Siqueira; Mio,Louise Larissa May De; Amorim,Lilian. |
| ABSTRACT: Brown rot is the most important disease of peaches in Brazil. The objective of this study was to compare the brown rot monocyclic components from Monilinia fructicola and M. laxa isolates from Brazil on peaches, due to the detection of M. laxa in the São Paulo production area. Conidia germination and pathogen sporulation were assessed in vitro under a temperature range of 5-35oC and wetness duration of 6-48h. Incubation and latent periods, disease incidence, disease severity and pathogen reproduction on peach fruit were evaluated under 10, 15, 20, 25 and 30oC and wetness duration of 6, 12 and 24h. Six of seven parameters of a generalised beta function fitted to conidia germination of M. fructicola and M. laxa were similar. Only the shape... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Epidemiology; Prunus Monilia; Disease monocycle. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000600151 |
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| Patiño,Paula Andrea González; Álvarez,Gloria Edith Guerrero; Valencia,Liliana Isaza. |
| ABSTRACT: Rubus glaucus Benth, commonly referred to as mora de Castilla, is affected by Colletotrichum acutatum, as it induces anthracnose in many of the plant organs. Generally, it affects the fruits during the post-harvest phase and damages them, causing economic losses due to the poor crop quality. At present, no standardized methods are available for this pathosystem that can be used to characterize quantitatively the epidemic and to permit the prediction and comparison of the disease management techniques. In this research, we proposed a logarithmic diagrammatic scale of the severity of anthracnose induced by C. acutatum in the fruits of the thornless variety of R. glaucus Benth. This scale is constructed on the adjustment of the Weber-Fechner law... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colletotrichum acutatum; Epidemiology; Pathometry; Phytopathometry; Rubus glaucus Benth. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400150 |
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| Negreiros,Rísia Lopes; Amaku,Marcos; Dias,Ricardo Augusto; Ferreira,Fernando; Cavalléro,João Crisostomo Mauad; Ferreira Neto,José Soares. |
| In the southern region of Mato Grosso do Sul state, Brazil, a foot-and-mouth disease (FMD) epidemic started in September 2005. A total of 33 outbreaks were detected and 33,741 FMD-susceptible animals were slaughtered and destroyed. There were no reports of FMD cases in other species than bovines. Based on the data of this epidemic, it was carried out an analysis using the K-function and it was observed spatial clustering of outbreaks within a range of 25km. This observation may be related to the dynamics of foot-and-mouth disease spread and to the measures undertaken to control the disease dissemination. The control measures were effective once the disease did not spread to farms more than 47 km apart from the initial outbreaks. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Foot-and-mouth disease; Spatial clustering analysis; Cattle; Epidemiology; Brazil. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000900035 |
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| Dorneles,Elaine Maria Seles; Pellegrin,Aiesca Oliveira; Péres,Igor Alexandre Hany Fuzeta Schabib; Mathias,Luis Antônio; Mourão,Guilherme; Bianchi,Rita de Cassia; Olifiers,Natalie; Rocha,Fabiana Lopes; Lage,Andrey Pereira. |
| A serological survey in free-ranging crab-eating foxes (Canidae: Cerdocyon thous) and brown-nosed coatis (Procyonidae: Nasua nasua) was performed in the Nhecolândia sub-region of the Brazilian Pantanal to evaluate the presence of anti-smooth Brucella antibodies on those wild populations. The detection of anti-smooth Brucella antibodies was performed by the Rose Bengal Test (RBT) as screening test and the Fluorescence Polarization Assay (FPA) as a confirmatory test. The frequency of smooth Brucella seropositive animals were 13.2% (5/38, 95% CI: 4.4% - 28.1%) for crab-eating foxes and 8.8% (3/34, 95% CI: 1.9% -23.7%) for brown-nosed coatis. No association was found between seropositivity for brucellosis and gender or age. The results of this study suggest... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Brazil; Brucella; Pantanal; Cerdocyon thous; Nasua nasua; Reservoirs; Epidemiology. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001202193 |
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| Santos,Sandra Batista dos; Melo,Renata Pimentel Bandeira de; Silva,Luana Thamires Rapôso da; Oliveira,Júnior Mário Baltazar de; Abad,Atzel Candido Acosta; Pinheiro Júnior,José Wilton; Mota,Rinaldo Aparecido. |
| ABSTRACT: The present study aimed to investigate contagious agalactia (CA) in flocks from Pernambuco State. The study involved 225 goats and 63 ewes; 288 milk samples and 100 vaginal swabs were collected in total. The PCR assays were carried out using specific primers to Mycoplasma agalactiae and the Mycoplasma mycoides cluster. Among the goat’s milk samples,12.0% (27/225) were positive for Mycoplasma agalactiae DNA, while 5.3% (12/225) contained the Mycoplasma mycoides cluster. Of the vaginal swabs taken from goats, 15.4% (12/78) were positive for Mycoplasma agalactiae DNA and 3.8% (3/78) contained the Mycoplasma mycoides cluster. In the case of ewes, 4.3% (1/23) of the milk samples contained Mycoplasma agalactiae DNA, and 7.5% (3/40) were positive for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Contagious agalactia; Flocks; Diagnostic; Epidemiology; Risk factor.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000400452 |
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| Registros recuperados: 316 | |
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