Streptococci: Meaning, Characteristics and Laboratory.
Group A is responsible for meningitis outbreaks in Sub-Saharan Africa, while group B is responsible for meningitis in the United States and Europe (Bacteria Genomes-Neisseria Meningitidis, 2011). The process in which N. Meningitidis reproduces is binary fussion. Binary Fussion is one of the most common ways for bacterial cells to reproduce. N. Meningitidis is heterotrophic meaning it survives.
Penicillin G is a broad-spectrum, beta-lactam naturally occurring penicillin antibiotic with antibacterial activity. Penicillin G binds to and inactivates the penicillin binding proteins (PBPs) located inside the bacterial cell wall. Inactivation of PBPs interferes with the cross-linkage of peptidoglycan chains necessary for bacterial cell wall strength and rigidity.
The oral cavity is suggested as the reservoir of bacterial infection, and the oral and pharyngeal biofilms formed by oral bacterial flora, which is comprised of over 700 microbial species, have been found to be associated with systemic conditions. Almost all oral microorganisms are non-pathogenic opportunistic commensals to maintain oral health condition and defend against pathogenic.
Chapter 15: Streptococcus, Enterococcus, and Other Catalase-Negative, Gram-Positive Cocci. All Answers. MULTIPLE CHOICE 1. What test differentiates staphylococci from streptococci?
Streptococcus pneumoniae shares its alpha hemolytic properties with the viridans group of streptococci. However, they differ in other properties. S. pneumoniae is optochin sensitive, bile soluble and capsulated. It ferments inulin and produces virulence in mice. While viridans streptococci are optochin resistant, bile insoluble and non-capsulated. They do not ferment inulin and do not produce.
Streptococcus pneumoniae. Streptococcus pneumoniae in clinical material occurs in two distinctive forms. Encapsulated, virulent strains isolated e.g., from sputum in patients with acute pneumonia, often forming highly mucoid, glistening colonies (production of capsular polysaccharide) surrounded by a zone of alpha-hemolysis.After prolonged cultivation (48 hours in an aerobic atmosphere.
M315 Microbiology Lab Final. STUDY. Flashcards. Learn. Write. Spell. Test. PLAY. Match. Gravity. Created by. marissa4783. Terms in this set (185) Describe the position of your hands when carrying the microscope to and from your laboratory bench. The microscope should be carried with both hands; one underneath the base and the other around the arm. Differentiate between the limit of resolution.