Gramegative diplococci include several Neisseria species, such as meningococci and gonococci; and Branhamella catarrhalis. Branhamella catarrhalis (formerly Neisseria catarrhalis) is a member of the genus Moraxella but closely resembles neisseriae in many respects, including microscopic appearance. B. catarrhalis, as well as some of the neisseriae, is normally found in the upper respiratory tract. Although usually […]