STAPHYLOCOCCUS

Exotoxin Elaboration

• Impetigo

• Ritter disease

• Carbuncle

COAGULASE test

• Differentiates Staphylococcus from Streptococcus

• Differentiates SAU from other Staphylococcus species

• Differentiates Micrococcus from Staphylococcus

• Differentiates Micrococcus & Rothia from Staphylococcus

Modified Oxidase Test

• Differentiates Staphylococcus from Streptococcus

• Differentiates SAU from other Staphylococcus species

• Differentiates Micrococcus from Staphylococcus

• Differentiates Micrococcus & Rothia from Staphylococcus

Novobiocin Susceptibility Test

• Differentiates Staphylococcus from Streptococcus

• Differentiates SAU from other Staphylococcus species

• Differentiates Micrococcus from Staphylococcus

• Differentiates S. saprophyticus from other CONS

What is the proper flow of procedures in identification of Staphylococcus?

• 1. 1.Do direct Gram Staining on sample

  2.Perform Coagulase test

  3.Perform Catalase test

  4.Culture

• 1. 1.Do direct Gram Staining on sample

  2. 2. Culture

  3. 3.Perform Catalase test

  4.Perform Coagulase test

• 1. 1.Perform Catalase test

  2. 2.Perform Coagulase test

     3.Culture

• 1. 1.Culture

  2. 2.Perform Catalase test

  3. 3.Perform Coagulase test

Focal suppuration

• Ritter disease

• Sty

• Impetigo

• Boils

Protein A

• Enhance binding to host cells & prosthetics

• Binds to the Fc region of antibody (IgG)

• involves the activation of plasma coagulase-reacting factor (CRP), to produce the fibrin clot

Staphylococcus epidermidis is able to cause diseases by its ability to form biofilms by way of cell surface & extracellular compounds.

These cell surface structures and extracellular substances promote adherence of bacteria to surfaces of prosthetic devices.

• Only 1 statement is TRUE

• Both statements are TRUE

• Both statements are FALSE

DNAse test is done for the presumptive identification of S. aureus.

It could also be used to differentiate S. aureus from Micrococcus and Rothia.

• only 1 statement is true

• both statements are true

• both statements are false

Gene that allows bacteria to be resistant to antibiotics such as methicillin, penicillin and other penicillin-like antibiotics

• RecA gene

• MecA gene

• 16S Rrna

Tags

NGSS.HS-LS1-1