PG One

Objective: Porphyromonas gingivalis ( Pg) is one of the main putative pathogens of periodontal disease, especially of adult periodontitis.

目的：探讨牙周炎主要病原菌牙龈卟啉单胞菌（Pg）对常用抗菌药物的敏感性。

[ Objective] Streptococcus sanguis ( Ss) is one of the most popular bacteria in the oral cavity, which associates with various diseases. Porphyromonas gingivalis ( Pg) is one kind of anaerobic gram-negative bacteria associated with the chronic periodontitis.

[目的]血链球菌（Ss）是一种与许多疾病相关的口腔中最常见的细菌，牙龈卟啉单胞菌（Pg）是一种与慢性牙周疾病相关的革兰氏阴性的厌氧菌。

Prostaglandin ( PG) D_2 is one of unsaturated fatty acids with 20 carbon atoms, which is synthesized by PGD synthase ( PGDS) in the brain.

前列腺素D2（PGD2）是由前列腺素D2合成酶合成的一种二十碳不饱和脂肪酸。