purulent       
adjective  medical specialized uk/ˈpjʊə.rʊ.lənt/ us/ˈpjʊr.ə.lənt/
 脓的;含脓的
containing pus (= thick, yellowish liquid that comes from an infection in the body)
  Fever and purulent sputum should make one consider pneumonia as a diagnosis. 发烧和脓痰可能是因为肺炎。 
 - More examples
 - Simply examining the purulent discharge does not give accurate enough answers.
 - On arrival she complained of cough with purulent sputum.
 - The discharge is unilateral, purulent, foul-smelling, and blood-stained.
 - These infections can produce a profuse, frothy, and purulent (yellow or yellow-green) discharge that has a "fishy" odor.