
An improved counterselection cassette for use in Haemophilus influenzae
Keywords: LB, Luria–Bertani; NTHi, nontypeable Haemophilus influenzae; NAD, nicotinamide adenine dinucleotide; sBHI, supplemented brain heart Infusion; cTc, chlortetracycline; PCR, polymerase chain reaction; cAMP, adenosine 3′,5′-cyclic monophosphate; DNA, deoxyrib