Are Poultry or Wild Birds the Main Reservoirs for Avian Influenza in Bangladesh?

被引:31
作者
Hassan, Mohammad Mahmudul [1 ,2 ]
Hoque, Md. Ahasanul [2 ]
Debnath, Nitish Chandra [2 ,3 ]
Yamage, Mat [3 ]
Klaassen, Marcel [1 ]
机构
[1] Deakin Univ, Sch Life & Environm Sci, Ctr Integrat Ecol, Geelong, Vic, Australia
[2] Chittagong Vet & Anim Sci Univ, Fac Vet Med, Chittagong, Bangladesh
[3] FAO, Dhaka, Bangladesh
关键词
AIV; Antibodies; Domestic birds; Resident wild birds; Migratory birds; Spillover; Spill back; VIRUS H5N1; SURVEILLANCE; INFECTION; TRANSMISSION; DYNAMICS; PATTERNS; ECOLOGY;
D O I
10.1007/s10393-017-1257-6
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
Avian influenza viruses (AIV) are of great socioeconomic and health concern, notably in Southeast Asia where highly pathogenic strains, such as highly pathogenic avian influenza (HPAI) H5N1 and other H5 and H7 AIVs, continue to occur. Wild bird migrants are often implicated in the maintenance and spread of AIV. However, little systematic surveillance of wild birds has been conducted in Southeast Asia to evaluate whether the prevalence of AIV in wild birds is higher than in other parts of the world where HPAI outbreaks occur less frequently. Across Bangladesh, we randomly sampled a total of 3585 wild and domestic birds to assess the prevalence of AIV and antibodies against AIV and compared these with prevalence levels found in other endemic and non-endemic countries. Our study showed that both resident and migratory wild birds in Bangladesh do not have a particularly elevated AIV prevalence and AIV sero-prevalence compared to wild birds from regions in the world where H5N1 is not endemic and fewer AIV outbreaks in poultry occur. Like elsewhere, notably wild birds of the orders Anseriformes were identified as the main wild bird reservoir, although we found exceptionally high sero-prevalence in one representative of the order Passeriformes, the house crow (Corvus splendens), importantly living on offal from live bird markets. This finding, together with high sero- and viral prevalence levels of AIV in domestic birds, suggests that wild birds are not at the base of the perpetuation of AIV problems in the local poultry sector, but may easily become victim to AIV spill back from poultry into some species of wild birds, potentially assisting in further spread of the virus.
引用
收藏
页码:490 / 500
页数:11
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