Consulta: creatorFacets:"Freitas Neto,OC"
Registros recuperados: 6
Data/hora: 13/06/2024 02:54:54

Organic acids and/or compound with defined microorganisms to control Salmonella enterica serovar Enteritidis experimental infection in chickens
Provedor de dados: 89
Autores: Sterzo,EV; Paiva,JB; Mesquita,AL; Freitas Neto,OC; Berchieri Jr,A.
The association of human foodborne salmonellosis with poultry products enhanced the efforts to control Salmonella Enteritidis in poultry farms. Dietary organic acid supplementation is one of the measures currently used to reduce the presence of undesirable microorganisms. Another method to control enteric Salmonella in poultry is competitive exclusion using defined or undefined microorganisms products. Organic acids and microbiological methods to accelerate the development of the intestinal microbiota can be used individually or in combination. The present study evaluated the effect of dietary supplementation of an acidifier and of a defined multi-strain microbial mixture (Biomin® PoultryStar) via drinking water in the control of the intestinal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Competitive exclusion; Organic acids; Probiotic; Salmonella Enteritidis.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000100010

Experimental infection of commercial layers with wild or attenuated Salmonella Gallinarum mutant strains: anatomic pathology, total blood cell count and serum protein levels
Provedor de dados: 89
Autores: Garcia,KO; Berchieri Jr.,A; Santana,AM; Alarcon,MFF; Freitas Neto,OC; Fagliari,JJ.
The aim of the present study was to comparatively evaluate hemogram, blood serum components and anatomopathologic alterations in commercial layers experimentally challenged with an attenuated vaccine candidate strain (SG∆cobS∆cbiA) and other two pathogenic strains (SGDcobS and SGNalr) of Gallinarum (SG). In total, 280 commercial layers were randomly divided into 4 groups (G1, G2, G3 and G4). At five days of age, birds from groups G1 received approximately 107 colony forming units (CFU) of SGDcobS; meanwhile birds from group G2 and G3 received the same dose of SGNalr and SG∆cobS∆cbiA, respectively. Birds from G4 were not infected. At 24 hours before (DBI) and 24 hours after (1 DAI), and three (3 DAI), five (5 DAI), seven (7 DAI) ten (10 DAI), and fifteen...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acute-phase proteins; Attenuation; Fowl typhoid; Histopathology; Leukogram.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200004

Blood serum components and serum protein test of Hybro-PG broilers of different ages
Provedor de dados: 89
Autores: Silva,PRL; Freitas Neto,OC; Laurentiz,AC; Junqueira,OM; Fagliari,JJ.
Blood serum samples of HYBRO PG broilers were analyzed, with 30 samples collected from 21-day-old broilers (G1), 30 from 35-day-old birds (G2), and 30 from 42-day-old birds (G3), with the aim of establishing normal values of some blood serum parameters. The activities of the enzymes gamma-glutamyl-transferase (GGT), aspartate aminotransferase (AST), creatine kinase (CK), alkaline phosphatase (ALP), and lactate dehydrogenase (LDH), serum levels of total calcium, calcium ion, phosphorus, sodium, potassium, magnesium, chlorides, creatinine, uric acid, triglycerides, cholesterol, total protein, albumin, total and indirect and direct bilirubin, and electrophoretic profile of serum proteins in acrylamide (SDS-PAGE) and agarose gel were determined. There was no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler; Serum biochemistry; Serum protein test.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000400004

Infection of commercial laying hens with Salmonella Gallinarum: clinical, anatomopathological and haematological studies
Provedor de dados: 89
Autores: Freitas Neto,OC; Arroyave,W; Alessi,AC; Fagliari,JJ; Berchieri,A.
This study aimed at evaluating the susceptibility of commercial laying hens to Salmonella Gallinarum (SG). Two experiments were carried using a mutant strain of Salmonella Gallinarum resistant to nalidix acid (SGNALr). In the first trial, the resistance of birds was evaluated based on clinical signs, faecal shedding, and mortality. It was carried out with six lines of commercial layers being three light white layers, considered to be resistant to SG (W1, W2, W3), and three semi-heavy brown varieties (B1, B2, B3), considered susceptible to SG. Each group contained 15 one-day-old birds. Hens were inoculated in the crop at 5 days of age with 0.2 mL of SGNALr neat culture. In addition, to each brown variety, a new group of 15 birds was challenged with 0.2mL of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fowl typhoid; Hematology; Laying hens; Salmonella Gallinarum; Susceptibility.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000200010

Effect of Infectious Bursal Disease (Ibd) Vaccines on Infection of Salmonella Heidelberg in Broiler Chickens
Provedor de dados: 89
Autores: Marín-Gómez,SY; Martins,NRS; Fernando,FS; Coelho,HLG; Freitas Neto,OC.
ABSTRACT Salmonella Heidelberg (SH) has represented a great concern to the Brazilian poultry industry in the last years. It is known that immunosuppression in poultry is a contributing factor to increase Salmonella faecal shedding and to disturb control programmes. Not only infectious bursal disease (IBD) virus but also some live vaccines have been reported to induce immunosuppression. In the present study we assessed the effects of two live vaccines against IBD on SH-infected broiler chicks. At 7 days of age, birds of three groups (vaccinated with recombinant HVT-IBD vector, with immune complex-IBD vaccine and unvaccinated) were orally challenged with 1 x 108 CFU of SH. A group of hatchmates remained unvaccinated/unchallenged to serve as negative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salmonella; Faecal colonization; HVT-VP2 vector; Immune-complex; Depletion.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100321

Evaluation of Disinfectants Used in Pre-Chilling water Tanks of Poultry Processing Plants
Provedor de dados: 89
Autores: Guastalli,BHL; Batista,DFA; Souza,AIS; Guastalli,EAL; Lopes,PD; Almeida,AM; Prette,N; Barbosa,FO; Stipp,DT; Freitas Neto,OC.
ABSTRACT In poultry processing plants, disinfectants are often added to pre-chilling water tanks to reduce microbial contamination. The present study aimed at evaluating the effect of five disinfectants (acidified sodium chlorite, alkyl dimethyl benzyl ammonium chloride, chlorine dioxide, peracetic acid, and sodium hypochlorite) on the populations of food quality indicator microorganisms and on Salmonella Enteritidis (SE) in the presence and absence of organic matter. The results showed that chlorine dioxide and sodium hypochlorite did not reduce microbial carcass counts. On the other hand, acidified sodium chlorite, alkyl dimethyl benzyl ammonium chloride and peracetic acid reduced total and fecal coliform counts. Peracetic acid reduced the number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler carcasses; Disinfectant; Indicator microorganisms; Pre-chilling tank; Salmonella Enteritidis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200217