Emerg Infect Dis. 2018 Dec;24(12):2309-2316. doi: 10.3201/eid2412.180879.
We conducted a cross-sectional study in live bird markets (LBMs) in Dhaka and Chittagong, Bangladesh, to estimate the prevalence of avian influenza A(H5) and A(H9) viruses in different types of poultry and environmental areas by using Bayesian hierarchical logistic regression models. We detected these viruses in nearly all LBMs. Prevalence of A(H5) virus was higher in waterfowl than in chickens, whereas prevalence of A(H9) virus was higher in chickens than in waterfowl and, among chicken types, in industrial broilers than in cross-breeds and indigenous breeds. LBMs with >1 wholesaler were more frequently contaminated by A(H5) virus than retail-only LBMs. Prevalence of A(H9) virus in poultry and level of environmental contamination were also higher in LBMs with >1 wholesaler. We found a high level of circulation of both avian influenza viruses in surveyed LBMs. Prevalence was influenced by type of poultry, environmental site, and trading.
我们在孟加拉国的达卡和吉大港的活禽市场 (LBM) 进行了一项横断面研究，通过贝叶斯层次逻辑回归模型来估计不同类型家禽和环境区域中甲型流感 A(H5) 和 A(H9) 病毒的流行率。我们在几乎所有的 LBM 中都检测到了这些病毒。水禽中的 A(H5) 病毒流行率高于鸡，而鸡中的 A(H9) 病毒流行率高于水禽，在鸡的类型中，工业肉鸡比杂交鸡和本地品种的流行率更高。有超过 1 个批发商的 LBM 比仅零售的 LBM 更容易受到 A(H5) 病毒的污染。有超过 1 个批发商的 LBM 中，家禽中的 A(H9) 病毒流行率和环境污染水平也更高。我们发现调查的 LBM 中两种禽流感病毒的传播水平都很高。流行率受家禽类型、环境场所和交易的影响。
