Staphylococcus aureus?

Question

is Staphylococcus aureus gram negative or gram positive? ive tried looking it up but different sources say different things

Answer 1

Gram positive cocci

Answer 2

gram positive..

STAPH & STREP confirm gram positive.

Answer 3

Staphylococcus aureus = gram positive cocci in clusters.

Answer 4

It's a gram positive cocci, which means it appears purple/blue under the microscope. It is also catalase positive (distinguishing it from Strep. species) and coagulase positive (distinguishing it from other Staph. species.

Answer 5

It's a classic gram positive organism, along with streptococcus.

Answer 6

Staphylococcus aureus

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Staphylococcus aureus



Scientific classification

Domain: Bacteria



Kingdom: Eubacteria



Phylum: Firmicutes



Class: Bacilli



Order: Bacillales



Family: Staphylococcaceae



Genus: Staphylococcus



Species: S. aureus





Binomial name

Staphylococcus aureus

Rosenbach 1884

Staphylococcus aureus (pronounced /ˌstæfɨləˈkɒkəs ˈɔriəs/, literally "Golden Cluster Seed" and also known as golden staph, is the most common cause of staph infections. It is a spherical bacterium, frequently living on the skin or in the nose of a person. Approximately 20–30% of the general population are "staph carriers".[1] Staphylococcus aureus can cause a range of illnesses from minor skin infections, such as pimples, impetigo (may also be caused by Streptococcus pyogenes), boils, cellulitis folliculitis, furuncles, carbuncles, scalded skin syndrome and abscesses, to life-threatening diseases, such as pneumonia, meningitis, osteomyelitis endocarditis, Toxic shock syndrome (TSS), and septicemia. Its incidence is from skin, soft tissue, respiratory, bone, joint, endovascular to wound infections. It is still one of the four most common causes of nosocomial infections, often causing postsurgical wound infections. Abbreviated to S. aureus or Staph aureus in medical literature, S. aureus should not be confused with the similarly named (and also medically relevant) species of the genus Streptococcus.

S. aureus was discovered in Aberdeen, Scotland in 1880 by the surgeon Sir Alexander Ogston in pus from surgical abscesses.[2] Each year some 500,000 patients in American hospitals contract a staphylococcal infection.[3]

Contents [hide]

1 Microbiology

2 Role in disease

2.1 Atopic dermatitis

2.2 Toxic shock syndrome

2.3 Mastitis in cows

3 Virulence factors

3.1 Toxins

3.2 Role of pigment in virulence

4 Diagnosis

4.1 Rapid Diagnosis and Typing

5 Treatment and antibiotic resistance

5.1 Mechanisms of antibiotic resistance

6 Infection control

7 Footnotes

8 External links



[edit] Microbiology



Gram stain of S. aureus.S. aureus is a Gram-positive coccus, which appears as grape-like clusters when viewed through a microscope and has large, round, golden-yellow colonies, often with hemolysis, when grown on blood agar plates.[4] The golden appearance is the etymological root of the bacteria's name: aureus means "golden" in Latin.

S. aureus is a aerobic and opportunistic pathogen.

S. aureus is catalase positive (meaning that it can produce the enzyme "catalase") and able to convert hydrogen peroxide (H2O2) to water and oxygen, which makes the catalase test useful to distinguish staphylococci from enterococci and streptococci. A large percentage of S. aureus can be differentiated from most other staphylococci by the coagulase test: S. aureus is primarily coagulase-positive (meaning that it can produce the enzyme "coagulase" that causes clot formation) while most other Staphylococcus species are coagulase-negative.[4] However, while the majority of S. aureus are coagulase-positive, some may be atypical in that they do not produce coagulase. Incorrect identification of an isolate can impact implementation of effective treatment and/or control measures.[5] It is medically important to identify S.aureus correctly, as S.aureus is much more aggressive and likely to be antibiotic-resistant

Answer 7

It is a gram negative bacilli (gNb).

Answer 8

gram positive