Consulta: subjectFacets:"Streptococcus agalactiae"
Registros recuperados: 13
Data/hora: 13/06/2024 04:17:17

Resposta inflamatória em tilápias suplementadas com uncaria tomentosa, avaliação do tempo de fornecimento
Provedor de dados: Revista de Educação Continuada em Medicina Veterinária e Zootecnia do CRMV-SP
Autores: A., Jefferson Yunis; Delgado, Daniel Cala; Claudiano, Gustavo S.; Marcusso, Paulo F.; Oliveira, Marcos A.; Moraes, Flávio R.; Fernandes, João B. K.
Os incas e as tribos amazônicas têm usado a planta “unha de gato” (Uncaria tomentosa), por suas propriedades imunoestimulantes no tratamento de diferentes moléstias. Os principais princípios ativos desta planta são alcaloides oxindólicos, derivados do ácido quinóvico e polifenóis de baixo peso molecular. Não existe informação sobre seus efeitos em peixes. Assim, o presente trabalho visou avaliar o efeito do tempo de suplementação dietética de ração contendo extrato de unha de gato sobre a resposta inflamatória em tilápias do Nilo (Oreochromis niloticus). Para tanto, 108 tilápias (40,8±3,2g; 10,5±1,5) foram utilizadas, distribuídas aleatoriamente em 6 caixas de 200l. Os peixes foram alimentados com ração suplementada com 150mg.kg-1do extrato durante três...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Imunoestimulante; Atividade imune; Hematologia; Tilápia; Streptococcus agalactiae.
Ano: 2013
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/20085

Prevalence, somatic cell count and etiology of bovine mastitis in Cuban herds from Mayabeque province using hand and machine milking
Provedor de dados: Revista de Salud Animal
Autores: Kent Ruiz,Amado; Peña,Joan; González,Dayaimi; Ponce,Pastor.
Few studies have been developed to evaluate the differences of bovine mastitis situation between hand and machine milking under the American tropic conditions. Twenty dairy herds were studied, 11 using hand milking (HM) and 9 machine milking (MM), from «San José de las Lajas» municipality, Mayabeque province. Between May 2009 and March 2012, samples from 182 cows (113 MM and 69 HM) were obtained meaning a 35.1% of total milking cows, resulting in 708 quarters sampled (435 MM and 273 HM). Samples were subjected to bacteriological diagnosis and somatic cell count (SCC). There were significant differences for the prevalence of blind quarters, subclinical mastitis and intramammary infections between hand milking, 1.1; 29.4 and 59.4% and machine milking, 3.8;...
Tipo: Journal article
Palavras-chave: Bovine mastitis; Coagulase negative Staphylococcus; Corynebacterium bovis; Staphylococcus aureus; Streptococcus agalactiae.
Ano: 2014
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2014000100002

Detección y caracterización de Streptococcus agalactiae en muestras para urocultivo
Provedor de dados: Acta Bioquímica Clínica Latinoamericana
Autores: Viegas Caetano,José; Larre,Silvina; Lopreto,Carmen.
La frecuencia de los aislamientos de Streptococcus agalactiae en el laboratorio clínico es cada vez mayor. Dada su importancia como patógeno, fundamentalmente relacionado a infecciones del tracto urinario, sepsis neonatal y puerperal, se hace necesario mejorar los métodos de detección. El presente trabajo pretende estudiar la frecuencia de los aislamientos de Streptococcus agalactiae en muestras para urocultivo con especial atención en las pacientes embarazadas. Se evaluaron 17.160 aislamientos durante un período de dos años, tanto de pacientes ambulatorios como de internados, aislándose Streptococcus agalactiae en 170 muestras (1%). Con agar sangre de carnero como medio de aislamiento se logró aumentar la sensibilidad en la detección de este...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Streptococcus agalactiae; Infección urinaria.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0325-29572004000400004

Streptococcus agalactiae associado à meningoencefalite e infecção sistêmica em tilápia-do-nilo (Oreochromis niloticus) no Brasil
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Figueiredo,H.C.P.; Carneiro,D.O.; Faria,F.C.; Costa,G.M.
Streptococcus agalactiae was isolated from cultured tilapia in Brasil. All isolates reacted similarly in API 20 STREP system (bioMerieux, France) and Slidex strepto grouping Latex Aglutination test (bioMerieux, France). Bacterial isolates were submitted to the disc diffusion technique for the antimicrobial susceptibility test. Among nine tested drugs S. agalactiae samples were resistant to three-neomicin, nalidixic acid and gentamicin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tilápia; Streptococcus agalactiae; Caracterização; Antibióticos.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000400036

Evaluation on the Pathogenesis of Streptococcus agalactiae in Nile Tilapia (Oreochromis niloticus)
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Pretto-Giordano,Lucienne Garcia; Müller,Ernst Eckehardt; Freitas,Julio Cesar de; Silva,Vanessa Gomes da.
The pathogenesis of a Streptococcus agalactiae was evaluated in a three-period experiment. Two groups of 40 fishes were intraperitoneally (i.p.) challenged in each experimental period with different infective doses of the pathogen. Doses varied from 1.0 x 10(6) to 1.5 x 10(8) CFU/fish. One group of 40 tilapia i.p. injected with tryptic soy broth (TSB) was used as a control group in each period. Mortalities varied from 67.5% in group 8 (infective dose 1.0 x 10(6) CFU/fish) to 90.0% in group 1 (infective dose 1.5 x 10(8) CFU/fish). Significant differences in mortalities were found only between group 8 and each of the other groups, except group 5 (infective dose 6.0 x 10(6) CFU/fish; mortality 75.0%). The highest mortality coefficients were observed in days...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Streptococcus agalactiae; Nile tilapia (Oreochromis niloticus); Clinical signs; Death rate.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100011

Distribution of serotypes and evaluation of antimicrobial susceptibility among human and bovine Streptococcus agalactiae strains isolated in Brazil between 1980 and 2006
Provedor de dados: Brazilian Journal of Infectious Diseases
Autores: Pinto,Tatiana Castro Abreu; Costa,Natália Silva; Souza,Aline Rosa Vianna; Silva,Ligia Guedes da; Corrêa,Ana Beatriz de Almeida; Fernandes,Flavio Gimenis; Oliveira,Ivi Cristina Menezes; Mattos,Marcos Corrêa de; Rosado,Alexandre Soares; Benchetrit,Leslie Claude.
Streptococcus agalactiae is a common agent of clinical and subclinical bovine mastitis and an important cause of human infections, mainly among pregnant women, neonates and nonpregnant adults with underlying diseases. The present study describes the genetic and phenotypic diversity among 392 S. agalactiae human and bovine strains isolated between 1980 and 2006 in Brazil. The most prevalent serotypes were Ia, II, III and V and all the strains were susceptible to penicillin, vancomycin and levofloxacin. Resistance to clindamycin, chloramphenicol, erythromycin, rifampicin and tetracycline was observed. Among the erythromycin resistant strains, mefA/E, ermA and, mainly, ermB gene were detected, and a shift of prevalence from the macrolide resistance phenotype...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Streptococcus agalactiae; Pulsed field gel electrophoresis; Epidemiology; Serotyping; Resistance profile.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702013000200003

Selective versus non-selective culture medium for group B streptococcus detection in pregnancies complicated by preterm labor or preterm-premature rupture of membranes
Provedor de dados: Brazilian Journal of Infectious Diseases
Autores: Nomura,Marcelo Luís; Passini Júnior,Renato; Oliveira,Ulysses Moraes.
The objective of this study was to identify group B streptococcus (GBS) colonization rates and compare detection efficiency of selective versus non-selective culture media and anorectal versus vaginal cultures in women with preterm labor and preterm-premature rupture of membranes (PROM). A prospective cohort study of 203 women was performed. Two vaginal and two anorectal samples from each woman were collected using sterile swabs. Two swabs (one anorectal and one vaginal) were placed separately in Stuart transport media and cultured in blood-agar plates for 48 hours; the other two swabs were inoculated separately in Todd-Hewitt selective media for 24 hours and then subcultured in blood-agar plates. Final GBS identification was made by the CAMP test. A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Streptococcus agalactiae; Culture media; Premature rupture of membranes; Preterm labor.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702006000400006

Assessment of conventional PCR and real-time PCR compared to the gold standard method for screening Streptococcus agalactiae in pregnant women
Provedor de dados: Brazilian Journal of Infectious Diseases
Autores: Ferreira,Michele Berger; de-Paris,Fernanda; Paiva,Rodrigo Minuto; Nunes,Luciana de Souza.
ABSTRACT Group B Streptococcus is a causative agent of invasive neonatal infections. Maternal colonization by Streptococcus agalactiae is a necessary condition for vertical transmission, with efficient screening of pregnant women playing an essential role in the prevention of neonatal infections. In this study, we aimed to compare the performance of conventional polymerase chain reaction and real-time PCR assays as screening methods for S. agalactiae in pregnant women against the microbiological culture method considered as the gold-standard. A total of 130 samples from pregnant women were analyzed for sensitivity, specificity, positive predictive value, and negative predictive value. Statistical analysis was performed using the SPSS software, version...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Streptococcus agalactiae; Pregnant women; Screening; Conventional PCR; Real-time PCR.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000600449

Group B Streptococcus detection: comparison of PCR assay and culture as a screening method for pregnant women
Provedor de dados: Brazilian Journal of Infectious Diseases
Autores: de-Paris,Fernanda; Machado,Alice Beatriz Mombach Pinheiro; Gheno,Tailise Conte; Ascoli,Bruna Maria; Oliveira,Kátia Ruschel Pilger de; Barth,Afonso Luis.
Streptococcus agalactiae or group B Streptococcus (GBS) is one of the most important causal agents of serious neonatal infections. Numerous assays have been evaluated for GBS screening in order to validate a fast and efficient method. The aim of this study was to compare the culture technique (established as the gold standard) with the molecular method of polymerase chain reaction (PCR) with specific primers (atr gene). Two hundred and sixty-three samples were analyzed. Vaginal samples were collected, according to the Centers for Disease Control and Prevention (CDC) recommendations, from women over 35 weeks of pregnancy at Hospital de Clínicas de Porto Alegre (HCPA). Two different extraction methods were tested in all samples collected. PCR technique...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Streptococcus agalactiae; Polymerase chain reaction; Culture; Pregnancy.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702011000400004

Colonization by Streptococcus agalactiae during pregnancy: maternal and perinatal prognosis
Provedor de dados: Brazilian Journal of Infectious Diseases
Autores: El Beitune,Patrícia; Duarte,Geraldo; Maffei,Cláudia Maria Leite.
We reviewed colonization by group B Streptococcus beta-haemolyticus of Lancefield (SGB), or Streptococcus agalactiae, in pregnant women, and the consequences of infection for the mother and newborn infant, including factors that influence the risk for anogenital colonization by SGB. We also examined the methods for diagnosis and prophylaxis of SGB to prevent early-onset invasive neonatal bacterial disease. At present, it is justifiable to adopt anal and vaginal SGB culture as part of differentiated obstetrical care in order to reduce early neonatal infection. The rates, risk factors of maternal and neonatal SGB colonization, as well as the incidence of neonatal disease, may vary in different communities and need to be thoroughly evaluated in each country...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pregnancy; Prognosis; Streptococcus agalactiae.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000400002

Molecular characterization of the first fluoroquinolone resistant strains of Streptococcus agalactiae isolated in Brazil
Provedor de dados: Brazilian Journal of Infectious Diseases
Autores: Barros,Rosana Rocha; Kegele,Fabíola Cristina Oliveira; Paula,Geraldo Renato de; Brito,Monique Araújo de; Duarte,Rafael Silva.
Three isolates of Streptococcus agalactiae, recovered from residents of the metropolitan area of Rio de Janeiro with significant bacteriuria, were found to be resistant to levofloxacin. Determination of the minimal inhibitory concentration (MIC) confirmed one isolate as intermediate and two as resistant to levofloxacin. No reduction in levofloxacin MIC was observed with reserpine, indicating that resistance was not caused by an efflux mechanism. Typical point mutations were observed in the quinolone resistance determinant region of gyrA and parC. Other point mutations in parC generated novel altered codons: Ser80→Pro in the intermediate resistance isolate, and Gly128→Asp in a resistant isolate. Through molecular modeling, it was possible to observe that...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Fluoroquinolone resistance; Bacteriuria; Genetic diversity; Streptococcus agalactiae.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000500013

Phenotypical characteristics of group B streptococcus in parturients
Provedor de dados: Brazilian Journal of Infectious Diseases
Autores: Simoes,Jose Antonio; Alves,Valeria Moraes Neder; Fracalanzza,Sergio Eduardo Longo; Camargo,Rodrigo Pauperio Soares de; Mathias,Lenir; Milanez,Helaine Maria Besteti Pires; Brolazo,Eliane Melo.
Colonization by Group B Streptococcus (GBS) is highly prevalent among pregnant women, with prevalence rates ranging between 4% and 30%. The infection may be transmitted vertically and may result in serious neonatal consequences. In the period from November 2003 to May 2004, a cross-sectional study was carried out among 316 parturients at the Jundiaí Teaching Hospital to establish the prevalence of genital GBS colonization, to identify the factors associated with colonization and the characteristic phenotypes of these streptococci. Samples from rectal and vaginal areas were collected for selective culture in Todd-Hewitt broth. Susceptibility to 7 antimicrobial agents was tested using the antibiotic diffusion disk technique, and the isolated strains were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Streptococcus agalactiae; Neonatal infections; Antimicrobial resistance; Serum type; GBS; Pregnant woman.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000200019

A combined enrichment/polymerase chain reaction based method for the routine screening of Streptococcus agalactiae in pregnant women
Provedor de dados: Brazilian Journal of Microbiology
Autores: Munari,F.M.; De-Paris,F.; Salton,G.D.; Lora,P.S; Giovanella,P; Machado,A.B.M.P; Laybauer,L.S.; Oliveira,K.R.P.; Ferri,C; Silveira,J.L.S.; Laurino,C.C.F.C; Xavier,R.M.; Barth,A.L; Echeverrigaray,S; Laurino,J.P.
Group B Streptococcus (GBS) is the most common cause of life-threatening infection in neonates. Guidelines from CDC recommend universal screening of pregnant women for rectovaginal GBS colonization. The objective of this study was to compare the performance of a combined enrichment/PCR based method targeting the atr gene in relation to culture using enrichment with selective broth medium (standard method) to identify the presence of GBS in pregnant women. Rectovaginal GBS samples from women at ≥36 weeks of pregnancy were obtained with a swab and analyzed by the two methods. A total of 89 samples were evaluated. The prevalence of positive results for GBS detection was considerable higher when assessed by the combined enrichment/PCR method than with the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Streptococcus agalactiae; Group B Streptococcus; Atr gene; Screening test; Accuracy.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100029