Hi Neel,
Actually it is not possible to identify agents that cause infections when some kind of treatment has started - at the same time they have to start treatment at once that is before they have got the results from the tests.
As I wrote before it is very common (50% of the cases) that they don't identify the agent. If they don't get response with one drug they have to try another.
"Empirical administration of broad-spectrum antibiotics is necessary for febrile neutropenic patients because the currently available diagnostic tests are not sufficiently rapid, sensitive. or specific for identifying or excluding the microbial cause of a febrile episode."http://www.ccspublishing.com/journal...enic_Fever.htm
It is true that paracetamol is better than other drugs that can decrease fever.
Hope they will find antibiotics that are effective!
Kind regards
Birgitta-A