Effects of Heterophil Adaptation on Salmonella enteritidis Fecal Shedding and Egg Contamination

1998 ◽  
Vol 42 (1) ◽  
pp. 6 ◽  
Author(s):  
T. T. Kramer
Keyword(s):  
Salmonella Enteritidis ◽  
Fecal Shedding

Combined Effect of Antibiotic and Competitive Exclusion Treatment on Salmonella Enteritidis Fecal Shedding in Molted Laying Hens

2000 ◽  
Vol 63 (4) ◽  
pp. 545-548 ◽  
Author(s):  
K. H. SEO ◽  
P. S. HOLT ◽  
R. K. GAST ◽  
C. L. HOFACRE
Keyword(s):  
Antibiotic Treatment ◽  
Salmonella Enteritidis ◽  
Bacterial Resistance ◽  
Competitive Exclusion ◽  
Laying Hens ◽  
Antibiotic Use ◽  
Combined Effect ◽  
Fecal Shedding ◽  
Feed Withdrawal

Salmonella Enteritidis is an important pathogen for the layer industry, primarily because of its ability to infect hens and ultimately contaminate egg contents. Studies have shown that stress situations, such as flock recycling (induced molting), can increase Salmonella Enteritidis problems in the flock. The present study examined the effect of antibiotic treatment and competitive exclusion (CE) on Salmonella Enteritidis shedding in the period following molt and 14-day feed withdrawal. In two separate trials, 48 birds after molt and feed withdrawal were divided into one group that was treated for 10 days with enrofloxacin in water followed by administration of CE culture and a group that was left untreated. Salmonella Enteritidis shedding was significantly reduced in the antibiotic-CE group. The Salmonella Enteritidis shedding rate was 33 and 25% in untreated birds versus 4 and 0% in the enrofloxacin-CE group on the two test days. These results indicate that treatment of Salmonella Enteritidis–positive laying hens after molting with enrofloxacin and CE culture can substantially reduce Salmonella Enteritidis problems due to molting and would be a possible alternative to diverting eggs for pasteurization or slaughtering the infected flock. Possible development of bacterial resistance in conjunction with antibiotic use is also discussed.

scholarly journals Persistence of fecal shedding of Salmonella Enteritidis by experimentally infected laying hens housed in conventional or enriched cages

2015 ◽  
Vol 94 (7) ◽  
pp. 1650-1656 ◽  
Author(s):  
Richard K. Gast ◽  
Rupa Guraya ◽  
Deana R. Jones ◽  
Kenneth E. Anderson
Keyword(s):  
Salmonella Enteritidis ◽  
Laying Hens ◽  
Fecal Shedding

scholarly journals The Simultaneous Administration of a Probiotic or Prebiotic with Live Salmonella Vaccine Improves Growth Performance and Reduces Fecal Shedding of the Bacterium in Salmonella-Challenged Broilers

Animals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 70 ◽  
Author(s):  
Nahed A. El-Shall ◽  
Ashraf M. Awad ◽  
Mohamed E. Abd El-Hack ◽  
Mohammed A. E. Naiel ◽  
Sarah I. Othman ◽  
...  
Keyword(s):  
Growth Performance ◽  
Broiler Chickens ◽  
Salmonella Enteritidis ◽  
Good Practice ◽  
Economic Losses ◽  
Comparative Efficacy ◽  
Fecal Shedding ◽  
Bacterial Diseases ◽  
Clinical Protection ◽  
Negative Effect

Salmonellosis is one of the most important bacterial diseases in poultry, causing heavy economic losses, increased mortality and reduced production. The aim of this study was the comparative efficacy of a commercial probiotic and/or prebiotic with a live attenuated Salmonella Enteritidis (SE) vaccine on the protection of broiler chickens from SE challenge. The efficacy of probiotic or prebiotic products, as well as a live Salmonella Enteritidis (SE) vaccine at the 7th day of age, administered via drinking water, were evaluated for clinical protection and effects on growth performance of broiler chickens experimentally challenged with SE at the 28th day of age. The use of probiotic or prebiotic simultaneously with the live Salmonella vaccine can diminish the negative effect of live vaccine growth performance, reducing mortality rate, fecal shedding, and re-isolation of SE from liver, spleen, heart and cecum. The use of probiotic or prebiotic simultaneously with the application of the live Salmonella vaccine is a good practice to diminish the negative effect of the harmful bacteria and improve the growth performance of broilers. Thus, further studies may be carried out with layers and breeders.

Pathogenesis of Salmonella enteritidis Infection in Laying Chickens. I. Studies on Egg Transmission, Clinical Signs, Fecal Shedding, and Serologic Responses

1990 ◽  
Vol 34 (3) ◽  
pp. 548 ◽  
Author(s):  
H. L. Shivaprasad ◽  
J. F. Timoney ◽  
S. Morales ◽  
B. Lucio ◽  
R. C. Baker
Keyword(s):  
Salmonella Enteritidis ◽  
Clinical Signs ◽  
Fecal Shedding

scholarly journals Efficacy of bacterin-, outer membrane protein- and fimbriae extract-based vaccines for the control of Salmonella Enteritidis experimental infection in chickens

2013 ◽  
Vol 33 (3) ◽  
pp. 326-330 ◽  
Author(s):  
Márcia C. Menão ◽  
Claudete S. Astolfi-Ferreira ◽  
Terezinha Knöbl ◽  
Antonio J. Piantino Ferreira
Keyword(s):  
Membrane Protein ◽  
Outer Membrane ◽  
Experimental Infection ◽  
Salmonella Enteritidis ◽  
Outer Membrane Proteins ◽  
Phage Type ◽  
Agglutination Test ◽  
Fecal Shedding ◽  
Antibody Titers ◽  
Organ Invasion

The efficacy of three vaccines was evaluated in chickens for the control of experimental infection with Salmonella Enteritidis (SE) phage type 4. The vaccines were produced with bacterin, outer membrane proteins (OMP) and fimbriae crude extract (FE). The chickens were vaccinated intramuscularly with two doses of each vaccine at 12 and 15 weeks of age. The chickens were then orally challenged with 10(9) CFU/chicken Salmonella Enteritidis phage type 4 at 18 weeks of age. Fecal swabs were performed for the recovery of shedding SE, and SE was recovered from the liver and spleen. Additionally, antibody titers were measured in the serum by micro-agglutination test. The results indicated that the vaccine produced with bacterin yielded better results and resulted in reduction of fecal shedding and organ invasion by SE after oral challenge, although no vaccine was 100% effective for the control of SE experimental infection.

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