The pus of liver abscess can identify the type of liver abscess, such as bacterial liver abscess and amoebic liver abscess, due to different colors and impurity components. 1. Bacterial liver abscess can be caused by Escherichia coli, staphylococcus, Klebsiella pneumoniae, etc. When bacteria invade into the liver and cause infection, it can lead to liver abscess, and the pus after puncture and aspiration is often yellowish-white in color, and bacteria can be found in the smear and culture. 2. Amebic liver abscess, often secondary to amoebic dysentery, pus is brown, no odor, microscopy can see amoebic trophozoites, no mixed infection, smear and culture do not see bacteria. Diagnosis of liver abscess can be confirmed by ultrasound-guided diagnostic puncture if necessary, and appropriate drug therapy can be selected according to the type of pathology.