Microbiology practicle Flashcards
biochemical activities of proteus
- phenylalanine positive
- urease positive to differentiate it from salmonella and shigella
- produce H2S which blackens the butt of tripple sugar agar
does not ferment any sugar
pseudomonas
virulence factors of pseudomonas
- Pili
- Endotoxin
- Enzymes (elastase and protease), that facilitate
invasion. - Exotoxin A: very similar to diphtheria toxin in its
action and causes tissue necrosis
has elastase and protease to facilitate invasion
pseudomonas
ability to grow in aqueous solutions that favors their persistence in hospital environment contaminating
pseudomonas
causes 10-20% of hospital
acquired infections
pseudomonas
has ability to withstand disinfectants
pseudomonas
obligate intracellular
parasite
chlamydiae
chlamydiae stained by?
Giemsa or Macchiavello stain
chlamydiae grow on?
tissue culture and in the yolk sac of chick
embryo
chlamydiae enter cell by and divide by?
enter as elementary body phagocytosis-like process
divide as reticulate body as binary fission
caused by chlamydiae, It is a milder form in which the cornea is not involved
Inclusion conjunctivitis
serotypes of Lymphogranuloma venereum (LGV)
L1, L2, L3
inguinal lymph nodes suppurate and the pus is drained through the overlying skin
LGV
Respiratory infections of chlamydiae is in patients with ………… due to……
inclusion conjunctivitis
drainage of infectious chlamydia through the nasolacrimal duct
