Bacterial identification

Biochemical test used to differentiate various Gram positive cocci

• Coagulase

• Catalase

• Oxidase

• Urease

Test used to differentiate Staphylococcus species

• Catalase

• Coagulase

• Urease

• Oxidase

Bacitracin susceptibility testing is used to identify

• Enterococcus

• alpha hemolytic Streptococcus

• beta hemolytic Streptococcus

• Staphylococcus

Optochin susceptibility is used to identify

• S.pneumoniae

• S.pyogenes

• E.faecalis

• E.faecium

Bile esculin hydrolysis is useful in identification of

• Streptococcus viridans

• Enterococcus

• S.pneumoniae

• S. pyogenes

Test characteristic of Klebsiellae tribe

• MR

• VP

• PPA

• Urease

Test characteristic of tribe Proteae

• MR

• VP

• PPA

• Urease

Oxidase positive organism

• Escherichia coli

• Klebsiella pneumoniae

• Proteus mirabilis

• Pseudomonas aeruginosa

Automated bacterial identification system where laser desorption is used

• Vitek2

• Phoenix

• BacTalert

• MALDI-TOF

Clumping factor test is used to identify

• Staphylococcus aures

• Streptococcus pyogenes

• Streptococcus pneumoniae

• Enterococcus faecalis