Investigations

Consider blood for PCR for meningococcus ^b

Why?

Blood PCR can help diagnose meningococcal disease

Patient	Target Disorder and Reference Standard	Diagnostic Test	LR+ (95% CI)	LR- (95% CI)
meningitis b	meningococcal disease (culture)	blood PCR	3.5 (1.5 to 8.3)	0.16 (0.19 to 0.61)