Which of the following is not found in meningococci?
Correct Answer: Plasmid
Description: Plasmid REF: Anathnarayan 8th ed p. 222, Jawetz, Melnick, & Adelberg's Medical Microbiology, 24TH Edition chapter 21 Table 21-1. Indirect repeat in December 2010 "Plasmids are rarely present in meningococcus" Gonococci and meningococci are closely related, with 70% DNA homology, and are differentiated by a few laboratory tests and specific characteristics: Meningococci have polysaccharide capsules, whereas gonococci do not, and meningococci rarely have plasmids whereas most gonococci do. Most impoantly, the two species are differentiated by the usual clinical presentations of the diseases they cause: Meningococci typically are found in the upper respiratory tract and cause meningitis, while gonococci cause genital infections. The clinical spectra of the diseases caused by gonococci and meningococci overlap, however. BIOCHEMICAL REACTIONS OF THE NEISSERIAE AND MORAXELLA CATARRHALIS Acid Formed from Growth on MTM, ML, or NYC Medium' Glucose Maltose Lactose Sucrose or DNase Fructose N gonorrhoeae + + - - ? N meningitidis + + + - - ? M catarrhalis - - - + 'MTM = modified Thayer-Main medium; ML = Main-Lewis medium; NYC = New York City medium
Category:
Microbiology
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