Department of Animal Health, Giai Phong, Hanoi, Vietnam.
FAO Emergency Centre for Transboundary Animal Diseases (ECTAD), Nguyen Gia Thieu, Hanoi, Vietnam.
Epidemiol Infect. 2013 Mar;141(3):601-11. doi: 10.1017/S0950268812001112. Epub 2012 Jun 1.
In Vietnam, highly pathogenic avian influenza (HPAI) H5N1 infections in poultry often occur without concomitant clinical signs and outbreaks are not consistently reported. Live bird markets represent a convenient site for surveillance that does not rely on farmers' notifications. Two H5N1 surveys were conducted at live bird markets/slaughter points in 39 districts (five provinces) in the Red River, Mekong delta, and central Vietnam during January and May 2011. Oropharyngeal and rectal swab samples from 12 480 ducks were tested for H5N1 by reverse transcription-polymerase chain reaction in pools of five. Traders and stallholders were interviewed using standardized questionnaires; 3·3% of pools tested positive. The highest prevalence (6·6%) corresponded to the Mekong delta, and no H5N1 was detected in the two Red River provinces. The surveys identified key risk behaviours of traders and stallholders. It is recommended that market surveys are implemented over time as a tool to evaluate progress in HPAI control in Vietnam.
在越南，家禽中经常发生高致病性禽流感（HPAI）H5N1 感染，而没有伴随临床症状，并且爆发情况并不一致报告。活禽市场是一种无需依赖农民通知即可进行监测的便利场所。2011 年 1 月和 5 月，在红河、湄公河三角洲和越南中部的 39 个地区（五个省）的活禽市场/屠宰点进行了两次 H5N1 调查。对来自 12480 只鸭子的咽拭子和直肠拭子样本进行了五份混合的逆转录-聚合酶链反应（RT-PCR）检测 H5N1。使用标准化问卷对交易商和摊主进行了访谈；有 3.3%的混合样本呈阳性。最高的流行率（6.6%）与湄公河三角洲相对应，而在两个红河省份未检测到 H5N1。调查确定了交易商和摊主的关键风险行为。建议随着时间的推移实施市场调查，作为评估越南 HPAI 控制进展的工具。
