What are the most common gram-positive bacteria?
Gram-positive cocci include Staphylococcus (catalase-positive), which grows clusters, and Streptococcus (catalase-negative), which grows in chains. The staphylococci further subdivide into coagulase-positive (S. aureus) and coagulase-negative (S. epidermidis and S.
What are the examples of gram-positive and Gram negative?
Gram Positive vs Gram Negative
| Gram positive bacteria | Gram negative bacteria |
|---|---|
| Bacteria include all staphylococci, all streptococci and some listeria species | Bacteria include enterococci, salmonella species and pseudomonas species |
| Thick peptidoglycan layer | Thin peptidoglycan layer |
What are some gram-positive infections?
Gram-positive infections include methicillin-resistant Staphylococcus aureus (MRSA), strep infections, and toxic shock. Gram-negative infections include salmonella, pneumonia, urinary tract infections, and gonorrhea.
Is E coli gram-positive?
Examples of Gram-negative bacteria include Escherichia coli (E coli), Salmonella, Hemophilus influenzae, as well as many bacteria that cause urinary tract infections, pneumonia, or peritonitis. Gram stain can be done within a few hours.
Is TB gram-positive?
tuberculosis belongs to the high G+C Gram-positive bacteria that form a monophyletic group with the low G+C Gram-positive bacteria such as Bacillus subtilis.
Are streptococci Gram-positive?
Streptococci are Gram-positive, nonmotile, nonsporeforming, catalase-negative cocci that occur in pairs or chains.
Is Streptococcus Gram-positive or negative?
Streptococci are Gram-positive, nonmotile, nonsporeforming, catalase-negative cocci that occur in pairs or chains. Older cultures may lose their Gram-positive character. Most streptococci are facultative anaerobes, and some are obligate (strict) anaerobes.