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Mycoplasma meleagridis of turkeys: probability of eliminating egg-borne infection
Abstract:
An equation was developed that describes the probability of eliminating egg-borne Mycoplasma meleagridis (MM) of turkeys by egg treatment. Probability (P) of MM elimination was described in terms of four parameters: pretreatment prevalence of MM, alpha; treatment failure rate, beta; number of eggs treated, n; and hatching rate, h. The eradication equation, based on the Poisson probability distribution, was P(0) = e-n alpha beta h. Probabilities derived from 12 hypothetical MM-eradication situations showed that increasing the size of any or all of the parameters decreased the likelihood of eradication. Use of the predictive equation as a planning tool in a successful MM-eradication program is demonstrated.
Insights
A new equation predicts the success of eliminating egg-borne Mycoplasma meleagridis (MM) in turkeys through egg treatment. Higher MM prevalence, treatment failure, or egg numbers reduce eradication probability.
Area of Science:
- Veterinary Science
- Animal Health
- Poultry Diseases
Background:
- Egg-borne Mycoplasma meleagridis (MM) poses a significant threat to turkey health and industry.
- Effective eradication strategies for MM are crucial for maintaining flock health and productivity.
Purpose of the Study:
- To develop a predictive mathematical model for the probability of eliminating egg-borne Mycoplasma meleagridis (MM) in turkeys via egg treatment.
- To identify key parameters influencing the success rate of MM eradication programs.
Main Methods:
- Developed an equation based on the Poisson probability distribution to describe MM elimination probability (P).
- Incorporated four critical parameters: pretreatment MM prevalence (alpha), treatment failure rate (beta), number of eggs treated (n), and hatching rate (h).
- The equation formulated was P(0) = e-n alpha beta h.
Main Results:
- The predictive equation demonstrated that increasing any of the four parameters (alpha, beta, n, h) individually or collectively decreases the probability of MM eradication.
- Analysis of 12 hypothetical scenarios confirmed the inverse relationship between parameter values and eradication success.
Conclusions:
- The developed eradication equation serves as a valuable planning tool for Mycoplasma meleagridis eradication programs in turkeys.
- Understanding the impact of each parameter allows for optimized strategies to enhance the likelihood of successful MM elimination.