Question | Answer |
What are diptheroids? | Non- pathogenic Corynebacterium |
Where are diptheroids normal flora? | Skin, respiratory tract, vagina, soil, water |
What is the characteristic lesion of C. diphtheriae? | pseudomembrane- gray leathery web |
What diseases does the DPT or DTaP immunize against? | A. Dipthera
B. Tetnus
c.Pertusis |
What is the gram stain of Bacillus? | Gram pos bacilli with spores |
Is Bacillus an aerobic or anaerobic genus? | Aerobic |
What is the characteristic lesion of anaerobic infections? | Necrosis- dead tissue |
Which specimens are likely to contain clinically significant anaerobes? | a sample aspirated with needle and syringe or pus from a deep wound with a foul odor. |
Which specimens are unacceptable for anaerobic culture? | A. Swabs from surface wounds
B. Coughed up sputum and stomach contents |
What is the gram stain of Clostridium? | Gram Pos Bacilli with Spores |
Are Clostridium aerobic or anaerobic organisms? | anaerobic |
Where are Clostridium normally found? | Soil, dust, water, intestines of humans and animals |
What does Cl. tetani cause? | Lock jaw/ tetanus
neurotoxin causes painful muscle spasms |
What are the characteristics of a wound likely to become infected by Cl. tetani? | A. Deep puncture
B. Spores or dirt in wound
C. Dead Tissue |
What does Cl. perfringens cause? | ganggrene
causes swelling and tissue death, the organisms firments muscle sugars, produces gas and tears tissues apart |
What does Cl. difficle cause? | botchulism |
What is the Gram stain of Neisseria? | Gram negative diplococci |
Where are Neisseria species normal flora? | Throat, sputum |
What does a direct smear of urethral discharge that is positive for gonorrhea look like? | positive smear- intracellular gram negative diplococci |
Modified Thayer Martin agar is designed to facilitate the recovery of which organisms? | A,gonococcus
B. Meningococcus |
What does MTM use to select organisms? | Antibiotics- to prevent overgrowth by organisms often found in specimens |
How should MTM media be inoculated? | In a Z |
What must Neisseria have in the atmosphere to grow? | CO2 |
Give the name and a description of the disease caused by N. gonorrhoeae? | Gonorrhea- STD/STI with purulent discharge most common specimen- cervix in women and urethra in men |
How is gonorrheal conjuctivitis in newborns prevented? | Crede Method- eyes of newborn are rinsed with 1% silver nitrate |
Give the name and a description of the disease caused by N. meningitis? | Causes epidemic meningitis-purulent inflammation of the meninges |
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