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| Registros recuperados: 81 | |
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| Freire,R.L.; Navarro,I.T.; Bracarense,A.P.F.R.L.; Gennari,S.M.. |
| Immunity to Toxoplasma gondii was studied in pigs, after vaccination with T. gondii antigens incorporated into immunostimulating complexes. Nine pigs (group 1 - G1) were inoculated subcutaneously with T. gondii iscoms (LIV-5 sample) and three doses were given at 21 and 13 day-intervals. The results were compared in other three groups of nine pigs each: animals in group 2 (G2) were immunized with the LIV-5 antigens without Quil A, animals in group 3 (G3) were inoculated with tachyzoites of RH T. gondii isolate, and animals in group 4 (G4) received no vaccination. Four animals were neither vaccinated nor challenged with T. gondii (group 5 - G5). Thirty days after vaccination, pigs were challenged orally with 5´10(4) oocysts at AS-28 T. gondii isolate.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Toxoplasma gondii; Pig; Vaccine; Iscom. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352003000400002 |
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| Figueiredo,H.C.P.; Lage,A.P.; Pereira Júnior,F.N.; Leite,R.C.. |
| A bacterin from enterotoxigenic Escherichia coli (ETEC), containing fimbriae K99 and F41, was produced and its capacity to induce anti-K99 and anti-F41 antibodies in colostrum of vaccinated cows and in calf serum, and the persistence of these antibodies in neonates were determined. Three experiments were performed on two commercial farms. In all experiments animals were allotted randomly to the blocks, each block consisting of two pregnant females (a vaccinated one and a control one) and their respective calves. In experiment A (farm 1), comprised of 18 blocks, the animals received a vaccine dose 30 days before delivery. In experiment B (farm 1), consisted of 26 blocks, the animals received two vaccine doses (60 and 30 days before delivery). In experiment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calf; Enterotoxigenic Escherichia coli; Vaccine; Diarrhea; K99; F41. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352004000400001 |
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| Salvarani,F.M.; Lobato,Z.I.P.; Assis,R.A.; Lima,C.G.R.D.; Silva,R.O.S.; Pires,P.S.; Lobato,F.C.F.. |
| Aiming to investigate in vitro alternatives, a test for neutralizing antibody detection using cell culture was developed. This test was more sensitive than previous animal models, allowing for detection of substantially lower alpha toxin and anti-alpha toxin titers. Titers observed during in vivo and in vitro seroneutralization had a correlation of 99.12%, indicating that cell culture is a viable alternative in the evaluation of vaccine potency, screening of vaccinal seeds, and Clostridium septicum alpha toxin titration. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seroneutralization; Mouse; Guinea pig; Cell culture; Vaccine. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000400002 |
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| Barrios,P.R.; Marin,S.Y.; Rios,R.L.; Pereira,C.G.; Resende,M.; Resende,J.S.; Martins,N.R.S.. |
| Vacinas avícolas vivas comerciais produzidas entre 1991 e 2005 foram examinadas para a presença de genomas dos vírus da anemia infecciosa das galinhas (Gyrovirus CAV), da hepatite por corpúsculo de inclusão (Aviadenovirus FAdV) e da artrite viral/síndrome da má absorção (Orthoreovirus aviário ARV). Vinte e seis partidas de vacinas vivas liofilizadas de oito fabricantes com lacre original foram examinadas. As extrações de DNA e PCR de CAV e FAdV, e de RNA e RT-PCR para ARV, foram descritas previamente. Contaminações triplas de ARV, CAV e FAdV foram detectadas em vacinas de mesmo fabricante, produzidas em 1991 e 1992 contra a doença de Newcastle (DN), e para a encefalomielite aviária, produzida em 1994. ARV e CAV em co-infecção foram encontrados em vacinas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chicken; Vaccine; Avian Orthoreovirus; Aviadenovirus; Gyrovirus. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000100035 |
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| Moura,L.; Dohms,J.; Almeida,J.M.; Ferreira,P.S.; Biffi,C.P.; Backes,R.G.. |
| Adhesion proteins from Mycoplasma gallisepticum (MG) encoded by cytadhesion genes mgc1 and mgc2 were cloned into plasmid vectors and transformed into E. coli. Seventeen groups of specific-pathogen free (SPF), birds at four weeks of age were used to inoculate these two proteins (MGC1 and MGC2) mixed into an oil emulsion creating a novel MG vaccine. Six different protein concentrations (50, 100, 200, 400, 800, and 1000µg/bird) were tested with two equal concentration doses at four and seven weeks of age. In addition, many control groups were needed such as bacterin, membrane, no vaccine or challenge, oil emulsion alone, and no vaccine but challenged. Three weeks following the second vaccination, 50% of the birds in each treatment group were challenged with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evaluation; Development; Mycoplasmas; Poultry; Vaccine. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000600024 |
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| Rivas-Aravena,Andrea; Sandino,Ana María; Spencer,Eugenio. |
| Aquaculture has become an important economic sector worldwide, but is faced with an ongoing threat from infectious diseases. Vaccination plays a critical role in protecting commercially raised fish from bacterial, viral and parasitic diseases. However, the production of effective vaccines is limited by the scarcity of knowledge about the immune system of fish. Improving vaccines implies using antigens, adjuvants and employing methods of administration that are more effective and less harmful to the fish. In this context, in recent year there have studies of methods of encapsulating antigens in matrices of different types to apply in fish vaccines. This work reviews the new methods to improve fish vaccines by encapsulating them in polymers and... |
| Tipo: Journal article |
Palavras-chave: Nanoparticles; Vaccine; Aquaculture. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000400012 |
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| Tamekuni,Katia; Vidotto,Marilda Carlos; Felix,Samuel Rodrigues; Igarashi,Michelle; Garcia,João Luis; Coelho,Adriana Letícia; Gasparini,Marcela Ribeiro; Marana,Elizabete Regina Marangoni; Silva,Sérgio Silva da; Vidotto,Odilon. |
| This work aims to evaluate the potential of immunization with E. coli BL21 expressing the recombinant rMSP1a and rMSP1b proteins of Anaplasma marginale. E. coli BL21 was transformed with recombinant plasmids pET102/msp1α and pET101/msp1β, and rMSP1a and rMSP1b were expressed after induction by IPTG. BALB/c mice were vaccinated with formolized BL21/rMSP1a and BL21/rMSP1b, and the production in mice sera of whole IgG was determined by ELISA. The mice immunized with BL21/rMSP1a showed a better humoral response for whole IgG when compared to the mice immunized with BL21/rMSP1b; these mice exhibited a small response after the second vaccination. Sera of mice immunized with BL21/rMSP1a reacted via western blot with BL21 and rMSP1a, with molecular masses varying... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anaplasma marginale; MSP1a; MSp1b; Vaccine; Mice; Cattle. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000700016 |
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| Silva,Bruno Correa da; Jatobá,Adolfo; Vieira,Felipe do Nascimento; Mouriño,José Luiz Pedreira; Bolívar,Norha; Seiffert,Walter Quadros; Martins,Mauricio Laterça. |
| The aim of this study was to evaluate the immune response of hybrid surubim vaccinated by intraperitoneal injection and by immersion against Aeromonas hydrophila. Vaccine was prepared with formalin-inactivated A. hydrophila. Forty eight fishes (47±9g) were distributed in 12 tanks (4 fish / tank) in the following treatments (4 tanks / treatment): unvaccinated fish, vaccinated intraperitoneally and vaccinated by immersion. After 21 days, intraperitoneally vaccinated fishes showed the highest values of total protein and immunoglobulins, agglutination titer and serum antimicrobial activity. Lysozyme concentration in the serum was higher in the fishes vaccinated by immersion than unvaccinated fishes. Intraperitoneal vaccination induced the highest immune... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pseudoplatystoma; Aeromonas hydrophila; Vaccine; Immunology. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000100010 |
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| Valenzuela B.,M. Teresa; Altuzarra H.,Rogelio; Trucco A.,Olivia; Villegas R.,Rodrigo; Inostroza S.,Jaime; Granata S.,Paulo; Fleiderman V.,José; Maggi C.,Leonardo. |
| S. pneumoniae is a significant cause of community-acquired pneumonia in the elderly, and accounts for the majority of the pneumonia deaths among the elderly. We conducted this randomized double-blind study to evaluate the immune response to a 23-valent pneumococcal polysaccharide vaccine and the persistence of antibodies two years after the vaccination in an elderly population in Santiago, Chile. A total of 118 elderly nursing home residents received either the pneumococcal or a tetanus control vaccine. Serum samples were taken at enrolment, at two months, and at two years post-vaccination. Pre-vaccination anti-pneumococcal antibody geometric mean concentrations (GMC) were similar in both study groups, with increased levels of antibodies found only against... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Streptococcus pneumoniae; Vaccine; Elderly; Immunogenicity; Antibodies. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000300005 |
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| Leite,Carolina Regis; Azevedo,Jailton; Galvão,Vivian Santos; Moreno-Carvalho,Otávio; Reis,Joice Neves; Nascimento-Carvalho,Cristiana. |
| Abstract Invasive pneumococcal disease is a relevant public health problem in Brazil, especially among children and the elderly. In July/2010 a 10-valent pneumococcal conjugate vaccine was introduced to the immunization schedule of Brazilian children under two years of age. Between July/2010 and December/2013 we conducted a case-series study on invasive pneumococcal disease in Salvador, Brazil to describe the clinical and bacteriological profile of invasive pneumococcal disease cases during the post-implementation period. Eighty-two cases were eligible. Mean age was 31 years (interquartile range, 3–42); 17.1% and 30.5% were under 2 years and 5 years, respectively. Pneumococcal meningitis (n = 64, 78.1%), bacteraemic pneumococcal pneumonia (n = 12, 14.6%)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Streptococcus pneumoniae; Vaccine; Epidemiology. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000100056 |
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| Sampaio,Barbara Carvalho Fialho; Rodrigues,Jaqueline Polizeli; Meireles,Luciana Regina; Andrade Junior,Heitor Franco de. |
| ABSTRACT Introduction: Vaccines are well-established public health interventions with major impacton the prevalence of infectious diseases, but outbreaks are occurring frequently due to pri-mary and secondary failures, despite high coverage. Surveillance of efficacy and duration ofinduced immunity is a difficult task as it requires invasive blood sampling in children andteenagers. Saliva can be an acceptable alternative source of IgG to assess vaccine efficacyand toxoplasmosis incidence. We investigated IgG response for measles, mumps, rubella,and T. gondii in saliva samples of vaccinated young people. Methods: Saliva was collected from 249 public schools students from São Paulo, Brazil, aged7 to 13 years old, during an interactive exhibition on hygiene.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vaccine; Prevalence; Non-invasive; Saliva; IgG; Toxoplasmosis. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702020000100051 |
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| Wilson,Nancy A.; Watkins,David I.. |
| The road to the discovery of a vaccine for HIV has been arduous and will continue to be difficult over the ensuing twenty years. Most vaccines are developed by inducing neutralizing antibodies against the target pathogen or by using attenuated strains of the particular pathogen to engender a variety of protective immune responses. Unfortunately, simple methods of generating anti-HIV antibodies have already failed in a phase III clinical trial. While attenuated SIV variants work well against homologous challenges in non-human primates, the potential for reversion to a more pathogenic virus and recombination with challenge viruses will preclude the use of attenuated HIV in the field. It has been exceedingly frustrating to vaccinate for HIV-specific... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: HIV; Vaccine; Challenges. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702009000400013 |
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| Zerbini,Cristiano A.F.; Ribeiro dos Santos,Rodrigo; Jose Nunes,Maria; Soni,Jyoti; Li,Ping; Jain,Varsha K.; Ofori-Anyinam,Opokua. |
| Abstract The World Health Organization influenza forecast now includes an influenza B strain from each of the influenza B lineages (B/Yamagata and B/Victoria) for inclusion in seasonal influenza vaccines. Traditional trivalent influenza vaccines include an influenza B strain from one lineage, but because two influenza B lineages frequently co-circulate, the effectiveness of trivalent vaccines may be reduced in seasons of influenza B vaccine-mismatch. Thus, quadrivalent vaccines may potentially reduce the burden of influenza compared with trivalent vaccines.In this Phase III, open-label study, we assessed the immunogenicity and safety of Southern Hemisphere inactivated quadrivalent influenza vaccine (Fluarix™ Tetra) in Brazilian adults (NCT02369341). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quadrivalent; Influenza; Vaccine; Immunogenicity; Safety; Brazil; Adults. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000100063 |
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| Bonazzi,Patricia R.; Bacchella,Telesforo; Freitas,Angela C.; Osaki,Karina T.; Lopes,Marta H.; Freire,Maristela P.; Machado,Marcel C.C.; Abdala,Edson. |
| Development of immunity to hepatitis B virus in cirrhotic patients waiting for liver transplantation is highly desirable. Though a double-dose regimen is available, little is know about its effectiveness. We examined the efficacy of double-dose hepatitis B virus vaccination in cirrhotic patients waiting for liver transplantation. We studied 43 patients who were waiting for liver transplantation. They were vaccinated with three doses of 40 mg hepatitis B vaccine at 0, 1 and 6 months; the normal dose is 20 mg. Efficacy was measured based on seroconversion of anti-HBs. Global response to the primary vaccination scheme was 67.5% (29 patients). Forty-one per cent of responders had anti-HBs titers above 1,000 IU/mL. No factors were associated with response,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vaccine; Cirrhotic; Hepatitis B; Liver transplant. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702008000400009 |
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| Registros recuperados: 81 | |
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