streptococci
Download
Skip this Video
Download Presentation
STREPTOCOCCI

Loading in 2 Seconds...

play fullscreen
1 / 33

STREPTOCOCCI - PowerPoint PPT Presentation


  • 220 Views
  • Uploaded on

STREPTOCOCCI. Streptococci facultative anaerobe Gram-positive chains or pairs catalase negative (staphylococci are catalase positive). Streptococcus in chains. Streptococcus pneumoniae (diplococcus). Fluorescent stain. Streptococci Lancefield groups

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' STREPTOCOCCI' - signe-harding


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2

Streptococci

    • facultative anaerobe
    • Gram-positive
    • chains or pairs
    • catalase negative
    • (staphylococci are catalase positive)
slide5

Streptococci

    • Lancefield groups
      • Satu atau lebih spesies per group
      • antigen permukaan
groupable streptococci
groupablestreptococci
  • A, B and D
    • most important
  • C, G, F
    • rare
non groupable
Non-groupable
  • S. pneumoniae
    • pneumonia
  • viridans streptococci
    • e.g. S. mutans
      • dental caries
hemolysis reaction sheep blood agar
hemolysis reaction - sheep blood agar
  • α (alpha)
    • partial hemolysis
      • green color
  • β (beta)
    • complete clearing
    • A and B
  • γ (gamma)
    • no lysis
hemolysis
Hemolysis
  • Groups A an B
    • β
  • Group D
    • α or γ
  • S. pneumoniae and viridans
    • γ
slide10

hemolysis reaction + one characteristic

  • presumptive identification
slide12

Group A streptococcal menginfeksi semua umur

  • Insiden tertinggi pd usia 5-15 thn
s pyogenes suppurative
S. pyogenes -suppurative
  • non-invasive
    • pharyngitis
    • Infeksikulit, impetigo
  • invasive bacteremia
    • toxic shock-like syndrome
    • "flesh eating" bacteria
    • pyrogenic toxin
pyrogenic toxin
Pyrogenic toxin
  • superantigen
  • T cell mitogen
  • Mengaktifkan sistem imun
scarlet fever
Scarlet fever
  • rash
  • erythrogenic toxin
non suppurative
non-suppurative
  • rheumatic fever
    • inflammatory disease
    • life threatening
    • Sekuel kronik
      • demam
      • jantung
      • sendi
        • rheumatic tidak sama dengan rheumatoid arthritis
rheumatic fever etiology
Rheumatic fever -etiology
  • M protein
    • cross-reacts heart myosin
    • autoimun
  • Antigen dinding sel
    • sedikit dicerna in vivo
    • bertahan lama
rheumatic fever
Rheumatic fever
  • penicillin
  • menyembuhkan pharyngitis
  • Menurunkan resiko carditis
acute glomerulonephritis
Acute glomerulonephritis
  • immune complex disease of kidney
major pathogenesis factors
Major pathogenesis factors
  • lipoteichoic acid/F protein
    • fimbriae
    • binds to epithelial cells
  • M protein
    • anti-phagocytic
m protein
M protein
  • major target
    • Imunitas alami
  • strain variation
    • antigenicity
  • re-infection
    • Terjadi dengan strain yg berbeda
capsules
Capsules
  • Anti-phagocytic
    • mucoid strains
isolation and identification
Isolation and identification
  • β hemolytic colonies
    • bacitracin menghambat pertumbuhan
  • β hemolytic colonies
    • group A antigen
hemolysis1
β hemolysis
  • hemolysin O
    • Sensitif oksigen
  • hemolysin S
    • Non sensitive oksigen
post infectious diagnosis serology
Post-infectious diagnosis (serology)
  • Antibodi thd streptolysin O
  • Penting! Bila menetap sekuel kronik terjadi
group b streptococcus
Group B streptococcus
  • neonatal meningitis
  • septicemia
  • transmission
    • vaginal flora
group b streptococcus identification
Group B streptococcus - identification
  • β hemolysis
  • hippurate hydrolysis
  • CAMP reaction
    • meningkatkan βhemolisis S. aureus
group d streptococcus
Group D streptococcus
  • Tumbuhpada bile esculin agar
    • precipitasihitam

6.5% salin

  • Tumbuh
    • enterococci
  • Tidaktumbuh
    • non-enterococci
enterococci
Enterococci
  • Hubungannya agak jauh dr streptococci lain
  • genus Enterococcus
  • Flora usus
    • urinary tract infection
      • Kontaminasi dr anus
    • opportunistic infections
      • khususnya endocarditis
  • Paling sering E. (S.) faecalis
enterococci1
Enterococci
  • resisten thd banyak antibiotik
    • termasuk vancomycin
      • ujung D-ala diganti dengan D-lactat
minute colony streptococci
Minute colony streptococci
  • Various groups (e.g. group A)
    • berbeda scr genetik
      • koloni yg besar (e.g. S. pyogenes)
    • tdk ada demam rheuma

Koloni besar

Koloni kecil

viridans streptococci
Viridans streptococci
  • diverse species
  • oral
  • Karies gigi
  • α hemolytic dan negatif thd tes lain
  • non-groupable.
  • termasuk S. mutans
    • endocarditis
    • cabut gigi
ad