What if there is insufficient fluid to use in the identification of the bacteria that caused mastoiditis?

Answer 1

If there is no fluid available, a tiny needle can be used to obtain a sample of the fluid which has accumulated behind the eardrum.

Answer 2

If there is insufficient fluid for bacterial identification, other diagnostic methods such as blood cultures or imaging studies may be used to help determine the causative agent. Clinical presentation and history can also guide antibiotic selection. In some cases, empirical treatment based on common pathogens causing mastoiditis may be initiated.