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Micro 4-6
Micro ch 4-6 test
| Question | Answer |
|---|---|
| What genera belong to the micrococcaceae family | staphlococcus, micrococcus, & stomatococcus |
| What biochemical test divide staphylococci into 2 groups | coagulase test |
| Where are staphylococci normal flora found | skin & mucous membrane |
| Characteristic gram stain & morph for staphlylococci | Gram positive cocci in grapelike clusters |
| Media grow staphylococci | BAP, CHOC, CNA, PEA, MSA |
| Is staphylococci aerobic or anaerobic | facultatively anaerobic |
| How does staphylococci cause disease | Invasive or toxic infection |
| What is principle of catalase testing | catalase (an enzyme) breaks down hydrogen peroxide into water (H2O) and oxygen (O2)w/bubbles formed by the released oxygen |
| What test should be used to presumptively identify S. saprophyticus | novabiacin disk |
| What type of hemolysis by staphylococci | Beta |
| Describe the colony morphology of staphylococcus | circular, opaque, smooth, & a butyrous consistancy |
| Describe the general characteristics of Streptococci | catalase-neg, gram pos cocci, chains |
| What is GAS known as | Group A Streptococci -Streptococcus pyogenes |
| What disease is caused by GAS | strep throat, scarlet fever, bacteriemia, skin infection, streptococcal toxic shock syndrome |
| What are the four systems for naming streptococci | serogrouping, physiologic properties, hemolytic activity, & common names |
| Colony morph and hemolysis for GAS | small colonies, translucent w/a large beta hemolytic zone |
| T or F GAS are normal flora | False |
| What is a Zone of Inhibition | a zone of no growth around antibiotic disk (susceptible) |
| Colonial morph & hemolysis of GBS | Large colonies, flat, creamy w/a small zone of Beta hemolysis |
| Hemolysis and colony morph of Streptococcus Pneumoniae | alpha hemolysis & produce either mucoid colonies or umbilicated colonies |
| The two important human pathogens in Bacillus species | B. anthracis & B. cereus |
| Anthrax is caused by | bacillus anthracis |
| Colony morph and gram stain morph of bacillus species | Large, gram-pos, or gram variable rods (poss spores), beta hemolysis, motile, beaten egg whites. |
| What organism been described as resembling chinese letters on gram stain | corynebacterium species |
| What is the causative agent of diptheriae | C. diptheriae |
| What culture media are used to grow corynebacterium | BAP, tellurite agar, loeffler medium, & PAI |
| Colony morph and gram stain of listeria monocytogenes | small gram pos, grey colonies, non-spore forming rod but looks like coccobacillary or coccoid |
| On gram stain, this organism is gram positive rods, with what appears as holes due to what | Bacillis and spores don't stain so they look like holes |
| What test can be used to differentiate listeria from GBS | bile-esculin & catalase test |
| What organism stains irregularly and appears as beading cocci | nocardia species |
Created by:
tigert74@embarqmail
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