Evaluation of alternative strategies to prevent Newcastle disease in Cambodia

Velogenic viscerotropic Newcastle disease (vvNCD), which is endemic in Cambodia, can be prevented in theory by a combination of biosecurity and immunization of broiler flocks. The relative contribution of appropriate biosecurity and effective vaccination was quantified at the farm level, applying re...

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Bibliographic Details
Published in:Preventive veterinary medicine 1998-06, Vol.35 (4), p.283-295
Main Authors: Sen, S, Shane, S.M, Scholl, D.T, Hugh-Jones, M.E, Gillespie, J.M
Format: Article
Language:English
Subjects:
ANALISIS DE COSTOS Y BENEFICIOS
ANALYSE COUT AVANTAGE
Animal Husbandry - economics
Animals
BROILER CHICKENS
CAMBODGE
CAMBODIA
CAMBOYA
Chicken-microbiological diseases
Chickens - virology
CONTROL DE ENFERMEDADES
CONTROLE DE MALADIES
COST BENEFIT ANALYSIS
Costs and Cost Analysis
DISEASE CONTROL
Newcastle disease
Newcastle Disease - economics
Newcastle Disease - prevention & control
NEWCASTLE DISEASE VIRUS
POLLO DE ENGORDE
POULET DE CHAIR
VACCINATION
Vaccination - veterinary
Vaccination biosecurity
VACUNACION
VIRUS DE LA ENFERMEDAD DE NEWCASTLE
VIRUS MALADIE DE NEWCASTLE
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Summary:Velogenic viscerotropic Newcastle disease (vvNCD), which is endemic in Cambodia, can be prevented in theory by a combination of biosecurity and immunization of broiler flocks. The relative contribution of appropriate biosecurity and effective vaccination was quantified at the farm level, applying realistic projections for capital investment, fixed and variable production costs and losses following infection. Non-protected broiler flocks generate a loss when the probability of vvNCD infection exceeds 0.4. Applying both biosecurity and effective vaccination would sustain profitability up to a probability of exposure of 1.0. The benefit to cost ratios for alternative strategies were evaluated for a range of probabilities of exposure to vvNCD extending from 0.1 to 1.0. The benefit-to-cost ratio for biosecurity exceeded unity at a risk of exposure exceeding 0.1, and 0.2 for vaccination and the combination of vaccination and biosecurity respectively. A sensitivity analysis demonstrated that the efficiency of protection, feed cost, and financial consequences of infection markedly affected the projected benefit-to-cost ratios associated with alternative methods of prevention.
ISSN:0167-5877
1873-1716
DOI:10.1016/S0167-5877(98)00065-8