What is an example of cocci bacteria?
Those that remain attached can be classified based on cellular arrangement: Diplococci are pairs of cocci (e.g.
Streptococcus pneumoniae and Neisseria gonorrhoeae) Streptococci are chains of cocci (e.g.
Staphylococci are irregular (grape-like) clusters of cocci (e.g.
Where can cocci bacteria be found?
The neisseriae are small, Gram-negative cocci usually seen in pairs with flattened adjacent sides. Most neisseriae are normal flora or harmless commensals of mammals living on mucous membranes. In humans they are common residents of the throat and upper respiratory tract.
What are the symptoms of gram positive cocci?
Streptococcus pyogenes is a gram-positive group A cocci which can cause pyogenic infections (pharyngitis, cellulitis, impetigo, erysipelas), toxigenic infections (scarlet fever, necrotizing fasciitis), and immunologic infections (glomerulonephritis and rheumatic fever).
How can you identify bacteria?
Bacteria are identified routinely by morphological and biochemical tests, supplemented as needed by specialized tests such as serotyping and antibiotic inhibition patterns. Newer molecular techniques permit species to be identified by their genetic sequences, sometimes directly from the clinical specimen.
What are the types of cocci?
Pairs of cocci are called diplococci; rows or chains of such cells are called streptococci; grapelike clusters of cells, staphylococci; packets of eight or more cells, sarcinae; and groups of four cells in a square arrangement, tetrads.