The poultry industry faces challenge amidst global food security crisis. Infectious bronchitis is one of the most important viral infections that cause huge economic loss to the poultry industry worldwide. The causative agent, infectious bronchitis virus (IBV) is an RNA virus with great ability for mutation and recombination; thus, capable of generating new virus strains that are difficult to control. There are many IBV strains found worldwide, including the Massachusetts, 4/91, D274, and QX-like strains that can be grouped under the classic or variant serotypes. Currently, information on the epidemiology, strain diversity, and global distribution of IBV has not been comprehensively reported. This review is an update of current knowledge on the distribution, genetic relationship, and diversity of the IBV strains found worldwide.

中文翻译：

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禽传染性支气管炎病毒的全球分布和毒株多样性：综述

全球粮食安全危机背景下，家禽业面临挑战。传染性支气管炎是最重要的病毒感染之一，给全世界家禽业造成巨大的经济损失。其病原体传染性支气管炎病毒（IBV）是一种RNA病毒，具有很强的突变和重组能力；因此，能够产生难以控制的新病毒株。全世界发现了许多 IBV 毒株，包括马萨诸塞州、4/91、D274 和 QX 样毒株，这些毒株可分为经典或变异血清型。目前，关于IBV的流行病学、毒株多样性和全球分布的信息尚未得到全面报道。这篇综述是对世界各地发现的IBV毒株的分布、遗传关系和多样性的最新知识的更新。