Related Experiment Videos
Intervention strategies for Salmonella enteritidis in poultry flocks: a basic approach
A W van de Giessen1, A J Ament, S H Notermans
1National Institute of Public Health and Environmental Protection (EEC Community Reference Laboratory for Salmonella), Bilthoven, The Netherlands.
International Journal of Food Microbiology
|January 1, 1994
Summary
Salmonella enteritidis infections in Dutch laying flocks are primarily from the farm environment, not vertical transmission. Intervention should focus on identifying and eradicating contaminated farms.
Area of Science:
- Veterinary Microbiology
- Food Safety
- Epidemiology
Background:
- Poultry laying flocks are susceptible to Salmonella enteritidis infections through various transmission routes.
- Understanding infection dynamics is crucial for developing effective control strategies in commercial poultry production.
Purpose of the Study:
- To model the cumulative infection curve of Salmonella enteritidis (S. enteritidis) in laying flocks.
- To estimate the contribution of different infection routes to overall flock contamination.
- To provide a basis for targeted intervention strategies to reduce S. enteritidis prevalence.
Main Methods:
- Development of a mathematical model for the cumulative infection curve of S. enteritidis.
- Analysis of practical infection data from Dutch laying flocks.
- Estimation of infection route contributions based on the model and empirical data.
Main Results:
- The cumulative infection curve in Dutch laying flocks indicated a low initial infection level, suggesting minimal vertical transmission.
- A high probability of infection was observed during the early stages of the laying period.
- The farm environment, including inadequate biosecurity and vermin, appears to be the primary source of S. enteritidis infection.
Conclusions:
- Vertical transmission plays a minor role in S. enteritidis flock infections in the studied population.
- Environmental contamination and farm biosecurity are critical factors influencing flock infection rates.
- Effective intervention strategies in The Netherlands should prioritize the identification and eradication of S. enteritidis from contaminated laying farms and their environment.