scholarly journals Effect of genetics, vaccine dosage, and postvaccination sampling interval on early antibody response to Salmonella enteritidis vaccine in broiler breeder chicks

1998 ◽  
Vol 77 (2) ◽  
pp. 271-275 ◽  
Author(s):  
M.G. Kaiser ◽  
T Wing ◽  
S.J. Lamont
Keyword(s):  
Antibody Response ◽  
Salmonella Enteritidis ◽  
Sampling Interval ◽  
Broiler Breeder

Control, prevention and eradication of Salmonella enteritidis infection in broiler and broiler breeder flocks

1989 ◽  
Vol 125 (22) ◽  
pp. 545-548 ◽  
Author(s):  
S. McIlroy ◽  
R. McCracken ◽  
S. Neill ◽  
J. O'Brien
Keyword(s):  
Salmonella Enteritidis ◽  
Broiler Breeder

Effect of Vaccinating Breeder Chickens with a Killed Salmonella Vaccine on Salmonella Prevalences and Loads in Breeder and Broiler Chicken Flocks

2011 ◽  
Vol 74 (5) ◽  
pp. 727-734 ◽  
Author(s):  
R. D. BERGHAUS ◽  
S. G. THAYER ◽  
J. J. MAURER ◽  
C. L. HOFACRE
Keyword(s):  
Confidence Interval ◽  
Broiler Chicken ◽  
Salmonella Enteritidis ◽  
Most Probable Number ◽  
Sample Type ◽  
Broiler Breeder ◽  
Probable Number ◽  
Commercial Broiler ◽  
Antibody Titers ◽  
Matched Design

The objective of this study was to evaluate the effect of vaccination of breeder chickens on Salmonella prevalences and loads in breeder and broiler chicken flocks. Chickens housed on six commercial breeder farms were vaccinated with a killed Salmonella vaccine containing Salmonella Typhimurium, Salmonella Enteritidis, and Salmonella Kentucky. Unvaccinated breeders placed on six additional farms served as controls. Eggs from vaccinated and unvaccinated breeder flocks were kept separately in the hatchery, and the resulting chicks were used to populate 58 commercial broiler flock houses by using a pair-matched design. Vaccinated breeder flocks had significantly higher Salmonella-specific antibody titers than did the unvaccinated breeder flocks, although they did not differ significantly with respect to environmental Salmonella prevalences or loads. Broiler flocks that were the progeny of vaccinated breeders had significantly lower Salmonella prevalences and loads than broiler flocks that were the progeny of unvaccinated breeders. After adjusting for sample type and clustering at the farm level, the odds of detecting Salmonella in samples collected from broiler flocks originating from vaccinated breeders were 62% lower (odds ratio [95% confidence interval] = 0.38 [0.21, 0.68]) than in flocks from unvaccinated breeders. In addition, the mean load of culture-positive samples was lower in broilers from vaccinated breeders by 0.30 log most probable number per sample (95% confidence interval of −0.51, −0.09; P = 0.004), corresponding to a 50% decrease in Salmonella loads. In summary, vaccination of broiler breeder pullets increased humoral immunity in the breeders and reduced Salmonella prevalences and loads in their broiler progeny, but did not significantly decrease Salmonella in the breeder farm environment.

scholarly journals The influence of age on the response of SPF hens to infection with Salmonella enteritidis PT4

1991 ◽  
Vol 106 (1) ◽  
pp. 33-43 ◽  
Author(s):  
T. J. Humphrey ◽  
H. Chart ◽  
A. Baskerville ◽  
B. Rowe
Keyword(s):  
Antibody Response ◽  
Salmonella Enteritidis ◽  
Specific Pathogen Free ◽  
Salmonella Infections ◽  
Specific Pathogen ◽  
Direct Administration

SUMMARYWhen Specific Pathogen–Free hens were infected with Salmonella enteritidis PT4 by direct administration into the crop, the age of the bird at infection was found to have an effect on both pathogenesis and antibody response. Birds at 20 weeks of age showed no adverse signs and developed high titres of antibodies of the IgM class, while those which were 1 year old at infection developed relatively little antibody arid had acute septicaemia, with 6 of 10 birds either dying or having to be humanely destroyed. The implication of these results for the control of salmonella infections in poultry is discussed.

scholarly journals Genotypic correlation between Salmonella Enteritidis isolates from broiler breeders and hatchery flocks

2021 ◽  
Vol 71 (4) ◽  
pp. 392-402
Author(s):  
İnci Başak Müştak ◽  
Hamit Kaan Müştak ◽  
Seyyide Sarıçam İnce
Keyword(s):  
Salmonella Enteritidis ◽  
Sequence Type ◽  
Farm Worker ◽  
Pfge Analysis ◽  
Broiler Breeder ◽  
Black Sea Region ◽  
Group I ◽  
Environmental Materials ◽  
Single Genotype ◽  
Cross Transmission

Abstract In this study, Salmonella Enteritidis strains isolated from dust and environmental materials from different flocks located in Turkey’s Western Black Sea region were examined by pulsed field gel electrophoresis (PFGE) and multilocus sequence typing (MLST). A total of 59 S. Enteritidis strains isolated from broiler breeder and hatchery flocks, and one S. Enteritidis strain isolated from a stool sample of a farm worker were examined. PFGE analysis revealed two major PFGE groups and nine different macro restriction profiles. It was determined that 85% (51/60) of the strains were close to each other and comprised Group I. All S. Enteritidis strains had the same sequence type (ST): ST11. Isolation of strains with a single genotype suggests that there may be a cross transmission between the flocks.

Salmonella enteritidis PT4: broiler breeder flock breakdowns

1992 ◽  
Vol 130 (19) ◽  
pp. 431-432
Author(s):  
N. Fowler ◽  
G. Mead
Keyword(s):  
Salmonella Enteritidis ◽  
Broiler Breeder
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