Abstract

Wang yanhong*, Wang xiaoquan, Liu wenbo, Yang yuefei, Zhu jie, Shao hui-jun, Zhang bin-bin, Han tao, and Liu Xiufan

A strain of Gram-negative diplococci was isolated from the liver of the Gaoyou Sheldrake. The 16S rRNA gene sequences of this organism was most similar to Bacterium ‘New Zealand A’ (GenBank accession no. AY721627), with 97% similarity to Neisseria animaloris in the Neisseria genus. It showed a diplococci morphology by electron microscopy. The biochemical reactions of this strain resembles N. mucosa, and it grew on nutrient agar and acidified dextrose, maltose, sucrose and did not acidified lactose. It was positive for oxidase and nitrate reduction. These results suggest that this organism belongs to the genus Neisseria, for which the name Neisseria tadorna sp. nov. is proposed. The strain was sensitive to Fleroxacin, Amikacin, etc and resistant to spectinomycin, sulfamethoxazolum-trimethoprimum and nalidixic acid.