Neco 2018 Agricultural Science Question 23
Practice objective / multiple choice question 23 from the 2018 Neco Agricultural Science examination.
During an outbreak of Newcastle disease on a poultry farm, the number of infected birds rose from \(10\) to \(40\) over a period of \(6\) days. The disease has a latent period of \(2\) days and an infectious period of \(4\) days. (a) Assuming exponential growth, estimate the basic reproduction number \(R_{0}\) using the approximation \(R_{0}\approx 1 + r\,T_{g}\), where \(r\) is the exponential growth rate and \(T_{g}\) (the generation time) equals latent period plus half the infectious period. (b) What minimum proportion of the flock must be immunised with a perfect vaccine to prevent a further epidemic? Express your answer as a percentage rounded to the nearest whole number.
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About This Question
This is Neco 2018 Agricultural Science Question 23. It is one of the objective questions from the 2018 Neco Agricultural Science examination.
Difficulty level: Medium .
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