Hi thanks for contacting health care magic.... Because of pneumonia you had exudative pleural effusion... 250 ml fluid is very much high amount... Now again you have pleural effusion.... For that first sputum is send for microscopic examination... Sputum culture also need to be done.... ADA estimation also done along with sputum for Tuberculosis detection.. If TB present AKT need to be given... If TB not present again pneumonia has to be treated according to culture report.... If therapeutic pleural effusion fluid removed then send it for cytological examination.... Consult pulmonologist or physician for your condition... Take care. Dr.Parth