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Microbiology
Stack #56157
Question | Answer |
---|---|
Haemophilus influenzae | small coco bacilli satelite growth around other colonies on BAP respiratory droplets spread infection |
H. influenzae | encapsulated- life threatening meningitis, b serotype non-encapsulated- locaolized infections |
Haemophilus ducrei | not normal flora STD- chanhroid ulcer, tropics look like school of fish on slide |
Haemophilus aegyptius | eye infection long rods |
Haemophilus | gram neg rods, pale pink, capnophiles(CO2) normal flora urinary tract |
Special growth requirements | Hemin=factor X, NAD=factor V, nicotine adenine dinucleotide, temp & moisture sensitive, plate immediately |
Pasteurella | gram negative small bacilli rods, non-motile, glucose fermentors |
Pasteurella tests | oxidase, indole, urease positive |
Pasteurella multocida | not normal flora, may be normal flora of animal handlers, infection from dog scratch/bite, treat with PCN |
pasteurella tests | urease negative, grows well on BAP & Choc agar |
Mannheimia haemolytica | grows well on BAP & Choc agar, indole & urease negative |
Suttonella indologenes | rare eye infection |
Bisgaerds taxonella | dog bite wound |
CBC group EF-4a | bite wounds |
Campyl, Arco & Heliobacter | small moitle curved rods, gram stain faintly pink, majority are pathogens |
Campyl, Arco & Heliobacter | found in GI tract & reproductive tract of animals, poultry major source, majority are pathogens |
Syndromes of Campyl & Arcobacter | febrile systemic disease-fever, periodontal disease, GI disease- most common, arco spp, does not multipy in food but may in water |
C. jejuni | raw milk, undercooked poultry, contaminted waste |
jejuni | AIDS pats can cause meningitis & endocarditis, post infection complication-Guillan-Barre syndrome |
Specimen-Campyl, Arco & Heliobacter | fecal or blood, Cary-Blair medium 4 transport |
Plate-Campyl, Arco & Heliobacter | skirrows agar, Campy agar, columbia agar w/lysed horse serum |
Morph-Campyl, Arco & Heliobacter | seagull wing, direct exam |
Helicobacter pylori | human stomach, biopsy, grows slowly |
Test-Helicobacter pylori | urease, catalase & oxidase positive |
Helicobacter pylori cont | treat with triple drug therapy, relapses occur, serodiagnostic tests |
Legionnairres Disease | Legionella pneumophila, Phila 1976, fatal 10-20% casea |
Morph-Legionnairres Disease | gram negative rod, stains faintly pink/red thin, giemsa or silver stain as backup |
Cont-Legionnairres Disease | media must contain L-cysteine & a pH 6.9, need deep sputum specimen |
Plate-Legionnairres Disease | BYCE-buffered charcoal yeast extract, w/polymixin B, anisomycin, cetamandole to fill any fungus |
Location-Legionnairres Disease | found in lakes, rivers, marine water, moist soils; man made- AC ducts, cooling towers, humidifiers, hot tubs |
Trans-Legionnairres Disease | not transmitted from person-2-person, can live outside the cell & in macrophages, needs a moist environment |
Antigen-Legionnairres Disease | respiratory secretions, DFA-direct fluorecence antibody |
BYCE_Legionnairres Disease | gray/white to blue/green; glistening convex, circular; cut-glass apperance |
Treat-Legionnairres Disease | resistant to PCN; erythromycin first or bactrim, rifampin, zithromax |
Bordetella pertussis | human only host, whooping cough; paratussi less severe, bronchiseptia-normal animal flora; is an abligate aerobe |
Test-Bordetella pertussis | gram negative, faintly staining, enhance w/safranin O counterstain; coccibacilli-single or pairs; oxidase & urease positive; grows BAP &MAC; non-motile |
Causes-Bordetella pertussis | human urt infections; attaches to respiratory ciliated epithelial cells-adhesins; paralyze beating cilia w/tracheal toxin; Pertussis Toxin |
Catarrhal stage | cold symptoms for weeks |
Paroxysmal stage | violent cough for 1-4 weeks |
Convalescent stage | symptoms slowly decrease, 6 months post infection |
Specimen-Bordetella pertussis | nasopharyngeal swab during cough or aspirates; DFA stain w/polyclonal AB |
Treat-Bordetella pertussis | erythromycon |
Prevent-Bordetella pertussis | vacine, need booster shot; DPT |