Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Intro to Bacteria
Chapter 2 Micro Exam 2
| Question | Answer |
|---|---|
| which bacteria are most commonly obligate anaerobes (main ones)? | peptostreptococci, clostridium, bacteroides, porphyromonas |
| the majority of human pathogens are? | facultative anaerobes (g+ cocci, g- bacilli) |
| less common human pathogens are? | obligate aerobes and/or g- cocci, g+ bacilli |
| what are some of the main facultative anaerobes that cause pathogenicity in humans? | staphylococcus, streptococcus, E. coli, Salmonella, etc |
| AEROBIC BACTERIA, G+ bacilli include? | Bacillus anthracis, Bacillus cereus, Listeria monocytogenes, Corneybacterium diphtheriae |
| AEROBIC bacteria, G+ cocci? | staphylococcus, streptococcus, enterococcus (the common aerobic gram positive pathogens) |
| AEROBIC bacteria, G- bacilli? | E coli, Pseudomonas, Salmonella (the common aerobic gram negative pathogens) |
| AEROBIC, bacteria, G- cocci? | Neisseria (not a common pathogen) |
| Ecoli, pseudomonas, salmonella? | G- bacilli, common pathogens, aerobes |
| Staph, Strep, Enterococci? | common pathogens, g+ cocci aerobic |
| Listeria monocytogenes most commonly causes what? | meningitis and bacteremia |
| Listeria monocytogenes is commonly found where? | animal products/animals |
| common in animals/animal products, opportunistic pathogen, commonly manifests as bacteremia and meningitis? | Listeria monocytogenes (g+ bacillus, aerobe) |
| spore formers, commonly found in the environment, rarely produce disease bc the natural concentrations are low, gram + | Bacillus species (Bacillus anthracis, cereus) |
| You are seeing a patient that appears to have a pharyngitis. Closer examination shows a gray membranous throat (adherant gray pseudomembrane). What is your initial dx and trx? | respiratory Corneybacterium diphtheriae infection. You treat the patient with penicillin, but also treat with Diphtheria antitoxin (to neutralize the exotoxin) |
| What are the affects of Corneybacterium diphtheriae infections? | adherant gray pseudomembrane, pharyngitis. The diphtheria exotoxin primarily affects the heart, kidneys, nerves by inhibiting protein synthesis. The oral colonization can cause airway obstruction. Treatment is emergent. |
| Gram+, cocci, catalase + | staphylococcus aureus |
| gram+, cocci, coagulase -? | Streptococcus, Enterococcus |
| what are the main B-lactamase stable B-lactams | cephalosporins, methicillin, nafcillin |
| Most Gram+ (virulent) orgs produce B-lactamase. What would be the best trx for these orgs, like Staph aureus? | B-lactamase stable B-lactams (like...nafcillin, cephalosporin, methicillin) |
| You have a Staph aureus org in your lab that you are testing. Initially you use penicillin. It eventually becomes resistant. You then use Methicillin (or other B-lactamase stable B-lactams) and it again becomes resistant, so you use Vancomycin. Next? | Vancomycin resistant SA may be treated with Synercid (quinupristin/dalfopristin) or Linezolid |
| What might you use Synercid or Linezolid for? | vancomycin-resistant staph aureus |
| What is the most common Coag neg Staphylococci? | Staph epidermidis |
| What are 2 broad but characteristic facts about coag neg staph? | opportunistic (esp prosthetics)/glycocalyx |
| What is the primary bacteria isolated from blood cultures? | Staph epidermidis |
| What is the first and second most common bacterial causes of UTI's in women? | (1st) Ecoli (2nd) coag neg Staphylococcus saprophyticus |
| Which group of bacteria are commonly associated with prosthetic plastics? | coag neg Staph |
| You have identified a bacterial culture from your patient morphologically as a G+coccus. You then test with catalase and get no reaction. What have you narrowed your search to? and what should be done next? | strep, enterococci; NEXT=hemolytic plates |
| gram+ catalase- and a clear zone on a hemolysis plate | B-hemolytic Group A Strep (GAS) |
| Group A strep is aka? | Strep pyogenes |
| Group B strep is aka? | Strep agalactiae |
| gram+ cocci, catalase -, alpha hemolytic, Optochin (Pdisk) succeptible? | Strep pneumoniae |
| gram+ catalase- alpha hemolytic, optochin (Pdisk) resistant? | viridans strep, enterococcus |
| gram+ catalase- gamma hemolytic? | viridans strep, enterococcus |
| explain the morphological and chemical profile for staph aureus? | gram+ catalase+ coag+ |
| explain the morphological and chemical profile for coag negative staph? | gram+ catalase+ coag- |
| explain the morphological and chemical profile for streptococci? | gram+ catalse- |
| explain the morphological and chemical profile for enterococci? | gram+ calase- alpha hemolytic-optochin R or Gamma hemolytic |
| a non-hemolytic organism will produce what type of hemolysis? | gamma |
| explain the morphological and chemical profile for Streptococcus pnemoniae? | gram+ catalase- alpha hemolytic, optochin (P disk) succeptible |
| explain the morphological and chemical profile for viridans strep? | gram+ catalase- alpha hemolytic, optochin resistant (or gamma hemolysis) |
| what is the gram stain of enterococci? | gram positive |
Created by:
crfnr5
Popular Medical sets