Abstract
Highly pathogenic avian influenza virus (HPAIV) is a major problem in the poultry industry. It is highly contagious and is associated with a high mortality rate. The Philippines experienced an outbreak of avian influenza (AI) in 2017. As there is always a risk of re-emergence, efforts to manage disease outbreaks should be optimal. Linked to this is the need for an effective surveillance procedure to capture disease outbreaks at their early stage. Risk-based surveillance is the most effective and economical approach to outbreak management. This study evaluated the potential of commercial poultry farms in Central Luzon to transmit HPAI by calculating their respective reproductive ratios (). The reproductive number for each farm is based on the spatial kernel and the infectious period. A risk map has been created based on the calculated R0. There were 882 (76.63%) farms with < 1. Farms with ≥ 1 were all located in Pampanga Province. These farms were concentrated in the towns of San Luis (n = 12) and Candaba (n = 257). This study demonstrates the utility of mapping farm-level estimates for informing HPAI risk management activities.
Highlights
Pathogenic avian influenza virus (HPAIV) has caused disease outbreaks among domestic poultry and wild bird populations, resulting in significant economic losses in many countries around the world
The study was conducted in Central Luzon, Philippines
There was a total of 1151 poultry farms that kept chickens (n = 880), ducks (n = 260), or quail (n = 11)
Summary
Pathogenic avian influenza virus (HPAIV) has caused disease outbreaks among domestic poultry and wild bird populations, resulting in significant economic losses in many countries around the world. The potential of the infection to cause illnesses in humans is a major concern. The Philippines confirmed an outbreak of HPAI H5N6 subtype, based on follow-up tests done in an Australian laboratory in August of 2017. Commercial poultry farms in barangays San Carlos and. Santa Rita of San Luis, Pampanga were affected. Cases were confirmed in Nueva Ecija, a province adjacent to Pampanga. A second wave of the outbreak was reported on 12 November
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