What is the Gram stain of Staphylococcus aureus?
What is the Gram stain of Staphylococcus aureus?
Staphylococcus aureus is the most dangerous of all of the many common staphylococcal bacteria. These gram-positive. Gram-positive bacteria stain blue when this stain is applied to them.
What is the morphology of the Staphylococcus species on the Gram stain?
MICROSCOPIC APPEARANCE
| Gram Stain: | Positive. |
|---|---|
| Morphology: | Spherical cocci; often forming regular and “grape-like” clusters. They occur singly, in pairs, tetrads, and short chains. |
| Size: | 0.5 by 1.5 micrometers. |
| Motility: | Non-motile. |
| Capsules: | Usually encapsulated, however, limited capsule formation has been noted on some species. |
What does S. aureus look like after Gram stain?
Staphylococcus aureus bacteria are pathogens to both man and other mammals. They are gram positive bacteria that are small round in shape (cocci) and occur as clusters appearing like a bunch of grapes on electron microscopy.
What is the morphology of staph?
Staphylococci are Gram-positive cocci about 0.5 – 1.0 μm in diameter. They grow in clusters, pairs and occasionally in short chains. The clusters arise because staphylococci divide in two planes.
Are Staphylococcus Gram-positive or negative?
Staphylococcus aureus is a gram-positive, catalase-positive, coagulase-positive cocci in clusters. S. aureus can cause inflammatory diseases, including skin infections, pneumonia, endocarditis, septic arthritis, osteomyelitis, and abscesses.
What diseases does Staphylococcus aureus cause?
It is the leading cause of skin and soft tissue infections such as abscesses (boils), furuncles, and cellulitis. Although most staph infections are not serious, S. aureus can cause serious infections such as bloodstream infections, pneumonia, or bone and joint infections.