期刊
EPIDEMIOLOGY AND INFECTION
卷 138, 期 6, 页码 813-824出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0950268809991038
关键词
Avian flu; epidemics; infectious disease control; mathematical modelling; veterinary epidemiology
资金
- EU Commission [FP6-513737]
- Italian Ministry of Health
In recent years the control of low pathogenicity avian influenza (LPAI) viruses of the H5 and H7 subtypes has increasingly become a concern. We evaluated the measures (stamping out, controlled marketing, emergency and preventive vaccination, farm density reduction and restocking in homogenous areas) implemented to control the LPAI epidemics that occurred in Italy between 2000 and 2005, using a combination of spatial and space time analyses and estimates of the basic reproduction ratio (R-0). Clustering of infected farms decreased over the years, indicating the effectiveness of the control strategies implemented. Controlled marketing [relative risk (RR) 0.46, 95% confidence interval (Cl) 0.27-0.80], emergency (RR 0.47, 95% CI 0.39-0.57) and preventive vaccination (RR 0.19, 95% CI 0.09-0.41) were the most effective measures, yet R-0<1 was only for preventive vaccination. Our results are useful for identifying the most effective measures for reducing the risk of the spread of LPAI and optimizing the allocation of resources.
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