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Efficacy of several Salmonella vaccination programs against experimental challenge with Salmonella gallinarum in commercial brown layer and broiler breeder hens Rev. Bras. Ciênc. Avic.
Paiva,JB de; Penha Filho,RAC; Argüello,YMS; Silva,MD da; Gardin,Y; Resende,F; Berchieri Junior,A; Sesti,L.
The protective effect of various Salmonella vaccines regimens against an experimental Salmonella Gallinarum challenge (SGNalr strain at 12 wk of age) was evaluated in two experiments. In Experiment 1 commercial brown layers were vaccinated according to one of the following programs: (i) two doses of a SE bacterin (Layermune SE; group 1); (ii) a first dose of a live SG9R vaccine (Cevac SG9R) followed by a SE bacterin (Layermune SE; group 2); (iii) one dose of each of two different multivalent inactivated vaccines containing SE cells (Corymune 4 & Corymune 7; group 3) or (iv) not vaccinated (group 4). In Experiment 2, broiler breeders were given the same vaccination treatments except for the group vaccinated with the multivalent vaccines. Overall, in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fowl Typhoid; Killed Salmonella vaccines; Live Salmonella vaccines; Salmonella Gallinarum; Salmonella Gallinarum challenge.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000100010
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Experimental infection of one-day-old chicks with Salmonella Serotypes Previously isolated from poultry facilities, wild birds, and swine Rev. Bras. Ciênc. Avic.
Sousa,E de; Werther,K; Berchieri Junior,A; Almeida,AM; Ardisson,FA; Silva,AC; Candioto,CG; Fernandes,SA.
In order to maintain the high production and export rates achieved by the Brazilian poultry industry, it is necessary to prevent and control certain disease agents, such as Salmonella spp. Using bacterial cultures, the aim of the present study was to investigate the prevalence of Salmonella spp. in specimens collected from broiler facilities. Local wild birds were also sampled, as well as the feces of swine housed on the poultry farm. After sample collection, the isolated serotypes were subsequently inoculated into broiler chicks to determine their effects. Positive samples were collected from the following locations in the poultry facilities: poultry litter (S. serotype 4,5,12:R:-; S. Heidelberg; S. Infantis), broiler feces (S. Heidelberg; S. serotype...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacteriology; Disease of poultry; Diseases of wild birds.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400003
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Molecular differentiation of Salmonella Gallinarum and Salmonella Pullorum by RFLP of fliC gene from Brazilian isolates Rev. Bras. Ciênc. Avic.
Paiva,JB; Cavallini,JS; Silva,MD; Almeida,MA; Ângela,HL; Berchieri Junior,A.
Although Salmonella Pullorum and Salmonella Gallinarum cause different diseases in poultry, they are very similar. Both are non-motile and present the same somatic antigenic structure. They are differentiated by biochemical tests. Certain atypical strains are very difficult to distinguish. They do not produce the expected results when dulcitol and ornithine descarxboxylase tests are performed. Therefore, additional tests could be helpful. Many studies have chose the part I of the gene that encodes flagellin (fliC) to differentiate serotypes. Most Salmonella strains have two structural genes (fliC and fliB) that encode flagellins. Non-motile strains generally present these structural genes, but are not able to build a functional flagellum. It was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: FliC gene; Differentiation; Salmonella Gallinarum; Salmonella Pullorum.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000400009
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Safety and efficacy of a salmonella gallinarum ΔcobSΔcbiA strain with potential to prevent chicken infections by salmonella gallinarum and salmonella enteritidis Rev. Bras. Ciênc. Avic.
Paiva,JB; Penha Filho,RAC; Moura,BS; Berchieri Junior,A.
New vaccine design techniques have allowed the development of effective vaccine strains against Salmonella infections inwhich the risks of reversion to the wild type and virulence is null. The mutant strain Salmonella Gallinarum ΔcobSΔcbiA was previously shown to be avirulent in chickens. In this study, this strain was tested as a vaccine against Salmonella Gallinarum (SG) and S. Enteritidis (SE) infections, and its protection levels, safety and possible risks of reversion to virulence after vaccination of layers were evaluated. Birds were vaccinated at five days of age or at five and 25 days of age. At 45 days of age, brown and white layers were challenged with SG and SE wild strains, respectively. Two assays to test the possibility of reversion to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Salmonella vaccine; Attenuation; Reversion to virulence; Chicken; Immune response.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000200005
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Salmonella spp. in meat-type quails (Coturnix coturnix coturnix) in the State of São Paulo, Brazil Rev. Bras. Ciênc. Avic.
Freitas Neto,OC de; Angela,HL da; Soares,NM; Guastalli,EAL; Almeida,AM de; Berchieri Junior,A.
In the present study Salmonella spp. was surveyed in four flocks of meat-type quails reared in a farm that also had processing plant on site, located in the region of Bastos, state of São Paulo, Brazil. Meconium samples of one-day-old quail chicks were collected from transport cardboard boxes. Cecal content was collected on days 7, 14, 21, 28 and 35 of rearing. At 36 days of age, birds were slaughtered in the farm's processing plant, where two samples of water from the scalding and the chilling tanks and four carcasses per flock were collected. All samples were examined for Salmonella spp. using traditional bacteriological methods. Salmonella spp. was present in meconium samples of three flocks and in cecal feces of the four flocks. This bacterium was also...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carcass; Meat-type quails; Salmonella spp.; Processing plant.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000300016
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Sources of human non-typhoid salmonellosis: a review Rev. Bras. Ciênc. Avic.
Freitas Neto,OC de; Penha Filho,RAC; Barrow,P; Berchieri Junior,A.
Salmonellosis is a worldwide disease caused by bacteria of the genus Salmonella. Currently, there are over 2,500 identified serovars of Salmonella. A reduced number of these serovars, about eighty, are implicated in most animals and human diseases. Most cases of salmonellosis in humans are associated with the consumption of contaminated food products such as beef, pork, poultry meat, eggs, vegetables, juices and other kind of foods. It may also be associated with the contact between humans and infected pet animals. Therefore, the chain of human salmonellosis is very complex and in most cases the origin of the infection is difficult to establish. The use of antimicrobial agents to treat and to prevent bacterial infections in humans and animals, as well as...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antimicrobial resistance; Beef; Food; Pork; Poultry; Salmonella spp; Vegetables.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000100001
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The Effect of Serial Culture and Storage on the Protective Potential of a Competitive Exclusion Preparation Rev. Bras. Ciênc. Avic.
Almeida,WAF; Berchieri Junior,A; Barrow,PA.
The competitive exclusion method (EC) was used to protect day-old birds against colonisation of the intestinal tract by Salmonella enterica serovar Enteritidis (SE). The culture prepared in nutrient broth incubated at 37ºC/24 h inhibited SE growth in the caecal contents. The beneficial effect was also observed after serial passage of the feces culture for up to 14 times. The material obtained after 12 serial sub-cultures after storage for 28 days at 4-6ºC also kept its action on SE.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aerobic faecal culture; Competitive exclusion; Salmonella Enteritidis.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000200006
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Time required to protect the intestinal tract of chicks against Salmonella enterica serovar enteritidis using competitive exclusion Rev. Bras. Ciênc. Avic.
Sterzo,EV; Paiva,JB; Penha Filho,RAC; Berchieri Junior,A.
Competitive exclusion (CE) has been designed to accelerate the colonization of the alimentary tract of young commercial birds and it has been also used to repopulate the digestive tract after antibiotic therapy. The method has been successfully adopted as a means to prevent enteric salmonellosis. The present study was carried out to evaluate if CE is able to prevent this kind of infection. Newly hatched chicks were given a CE culture and at different intervals of time birds infected with Salmonella Enteritidis were placed together with the group of treated birds. CE culture was prepared from feces of adult laying hens incubated overnight at 37C under aerobic conditions. Birds were killed 4 and 8 days after challenge and viable counts of Salmonella...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Competitive exclusion; Effectiveness; Salmonella Enteritidis.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000200009
Registros recuperados: 8
Primeira ... 1 ... Última
 

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