“…Though their findings have been disputed on technical grounds (Mpairwe, 1972), others have cited similar evidence (Norden, Callerame, and Baum, 1970). Type b strains of H. influenzae have virtually all been sentsitive to ampicillin in the past, but ampicillin-resistant isolates have now been reported from various parts of the world including the United Kingdom Schiffer et al, 1974;Thomsberry and Kirven, 1974;Clymo and Harper, 1974;Turk, 1974;Williams and Cavanagh, 1974;Schulte and Vollrath, 1974 Many sources have been consulted in compiling this data and are referrred to in full in Hambleton and Davies (1974). Erythromycin: the intramuscular preparation is very irritant and should be avoided whenever possible.…”