Host Specificity of DNA in Haemophilus influenzae: Similarity between Host-specificity Types of Haemophilus influenzae Re and Rf

Abstract

Summary: Strain Re of Haemophilus influenzae carries two genetically distinct host-specificity systems E1 and E2 each of which is able to restrict Haemophilus phage HP1c1 and each of which confers a specific modification upon phage grown in strain Re. These two systems are apparently identical to the host-specificity systems of H. influenzae Rf F1 and F2.