gé lán shì yīn xìng
Gram negative (bacteria that do not retain Gram stain, often the more dangerous kind)
革
gé
animal hide
兰
lán
abbr. for Lanzhou 蘭州|兰州[Lan2 zhou1], Gansu
氏
shì
(bound form) family name; surname (as in 王氏[Wang2 shi4] "the Wang clan")
阴
yīn
variant of 陰|阴[yin1]
性
xìng
nature