Lab Diagnosis

University:
University of South Florida
Course:
MCB 3020 | General Microbiology
Academic year:

2020
Views:

87

Pages:

2
Author:

Firstek

Lab diagnosis of Viridans streptococcus pneumonia:-Show gram staining.Stain purple on gram staining ( Gram +ve diplococci)Give negative catalase test (Streptococcus species)Give green zone around their colonies onblood agar plate (d-hemolytic streptococci)Show sensitivity against optochin antibiotic anddonot grow in medium with optochin.(streptococcus pneumoniae)Their colonies are bile soluble.Give positive quellung reaction (polysaccharidecancilalLab diagnosis of Viridans streptocacciShow gram stainingStain purple on Gram staining (Gram +ve cocciv)Give negative catalase test (streptococcus species)Give green colours around their colonies onblood agar plate (d-hemolytic streptococci)Show resistance against Optochin antibioticand give growth on optochin containing media(Viridans streptococci)Their colonies are not bile soluble.(viridans streptococci). Lab diagnosis of Streptococcus pyogenesiShow gram stainingcocciStain purple on gram staining (Gram +ve bacteria)Give negative catalase test (Streptococcus species)Show yellow-golden/clear zone around their colonies onblood agar plate (B-hemolytic streptococci)Show sensitivity against Bacitracin antibiotic anddonot grow in medium with bacitracin.Group. A streptococci, Streptococcus pygenes")UVLab diagnosis of Streptococcus lagalactiae :Show gram stainingStain purple on gram staining(Gram +ve (ccci))Give negative catalase test (Streptococcus species)Show yellow-golden/clear zone around their colonieson blood agar plate (B-hemolytic streptococci)Show resistance against "Bacitracin" and givegrowth on Bacitracin containing medium.(Gscup-B-Streptaccici, Streptococcus agalactiae)Give positive Hipperate-hydrolytic test (characteristic)