Abstract: The oral health of dogs has increasingly raised interest in recent years. The oral health not only influences dog's pleasing appearance and taking food，but also plays important roles in the general health. Similar to the intestine tracts，the oral cavities harbor complex assemblages of microorganisms in dogs. Various microbial communities maintain dynamic balance in different sites of the oral cavity，and constitute a complex oral micro ? ecosystem，the balance or imbalance of oral microbial community is closely related to the oral health and disease of dogs. This article summarizes the recent progress in the research of oral microbiota in dogs，including composition and distribution of oral microbes，the factors influencing the oral microbiota assemble，and relationship between oral microbiota and canine oral diseases，this article aim to promote the understanding of the complex and close relationship between canine oral microbes and between microbiota and oral environment，and also to provide an important theoretical basis for the diagnosis and prevention of oral diseases of dogs.

Key words: Microbial communities； Oral microbiome dysbiosis； Oral health and disease； Dogs

摘要： 近年来，宠物犬的口腔健康已引起了宠物主人越来越多的关注。口腔健康不仅影 响犬的美观以及进食，而且影响全身健康。与肠道相似，犬口腔中寄居着一个数量庞大、种类 繁多的微生物群落。各种微生物群落在口腔不同部位保持动态平衡，构成了复杂的口腔微生 态系统，口腔微生物群落的平衡或失调状况与犬的口腔健康和疾病密切相关。本文从犬口腔 微生物组成、影响口腔微生物组成的因素以及犬口腔微生物与口腔疾病的关系等方面进行综 述，旨在促进对犬口腔微生物之间以及微生物与口腔环境之间复杂而紧密关系的理解，并为 犬口腔疾病诊断和防治提供重要理论基础。

关键词: 微生物群落； 口腔微生物失调； 口腔健康与疾病； 犬