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Microbiology Module 5 exam Study online at https://quizlet.com/_d1gwxl 1. the concept of treating all samples, whether known or unknown, as potentially hazardous (or pathogenic) material is known as universal precau- tions 2. List at least 3 observations a researcher would be sure to note while assessing an unknown microbial sample size and shape, any observable motility, gram sta- tus, the presence of any chemical re- actions, changes in color localized to the organism or the surrounding media, and capturing im- ages of character- istics 3. while observing an unknown sample of limited amounts, a researcher must determine the following observations: (1) the presence of any motility, and (2) its gram status using the same sample--the liquid sample cannot be divided. which would you deter- mine first and why? you must deter- mine the motility before the gram status. motility re- quires a wet mount, while gram staining requires heat fix- ing the sample. if you were to deter- mine the gram sta- tus first you would kill the organism before you can de- termine its motility. 4. a facultative anaerobe is a microorganism capable of growth under what conditions? aerobic and anaer- obic conditions 5. as streptococcus is catalase negative would it thrive or die in the presence of peroxides? why? it would not sur- vive int he pres- ence of peroxides because it is un- 1 / 5

Microbiology Module 5 exam Study online at https://quizlet.com/_d1gwxl able to breakdown peroxides. perox- ides would damage the cellular integri- ty of strep causing cell death 6. streptococcus is most often streaked onto: blood agar 7. T/F the Lancefield groups are used to subdivide anti- genic groups of alpha-hemolytic streptococcus false 8. greater than 90% of all human streptococcal infec- tions belong to: group A 9. left untreated, strep throat can progress to _____, which displays ___ hemolytic activity Rheumatic fever, beta-hemolytic ac- tivity 10. T/F under most circumstances, staphylococcus can be found in ~30% of human population where is re- mains pathogenic false, it remains non-symptomatic 11. define commensal bacteria the bacterium nei- ther harms nor ben- efits from the host which it obtains nu- trients 12. attachment pathogen finds a specific host to at- tach to 13. evasion pathogen masks its own identity 14. entry utilization of a por- tal to enter the host 15. childhood skin disease near mouth/nose impetigo 2 / 5

Microbiology Module 5 exam Study online at https://quizlet.com/_d1gwxl 16. infection of thin, transparent scleral tissue conjunctivitis 17. infection occurs at time of birth ophthalmia neona- torum 18. pus-filled lesions on skin or hair Folliculitis 19. rupture pustules; treated with penicillin scalded skin syn- drome 20. T/F staphylococcus is the only causative agent of conjunctivitis false there are bacterial and viral forms 21. T/F an acid-fast stain is best suited to identify tuber- culosis as opposed to a gram stain true 22. T/F when located outside of the lung, TB is usually non-infectous true 23. Identify the disease based on the following: it is a small, acid-fast rod usually remaining asymptomatic for up to 20 years. it affects the skin, nerves, upper respiratory tract, and eyes of infected individuals. leprosy (Hansens disease) 24. T/F only directly ingesting the pre-formed clostridium toxin (neither the bacteria nor its spores) will cause disease in adults true 25. while visiting his grandparents, a 10-year-old child has green beans for dinner that were harvested from his grandparent's garden and canned the previous year. severe illness sets in and the child is taken to the hospital. botulism is suspected, but in what form? foodborne, infant, or wound? explain why it would not be classified as the other two options foodborne botu- lism. the child is too old to be consid- ered for infant bot- ulism, and wounds were not present. 26. T/F: there are currently no cures for tetanus true only symptoms can be managed 3 / 5

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Microbiology Module 5 exam Study online at https://quizlet.com/_d1gwxl 27. identify the medical condition characterized by ro- bust carbohydrate fermentation, swelling of the in- fected areas, and fever. Explain why hyperbaric oxy- gen therapy is a possible treatment gas gangrene, be- cause C. perfrin- gens is an anaero- bic bacteria 28. The alpha-toxin perfringolysin is associated with which medical condition caused by Gram-positive anaerobic bacteria? gas gangrene 29. you develop a fever, chills, and pneumonia after re- cently using a warm mist vaporizer in an attempt to open your sinuses. what bacterial disease would a doctor suspect is causing your symptoms? would the doctor suspect you contracted it from touching potentially contaminated doorknobs? legionnaires. no, le- gionella cannot be spread simply by direct contact be- tween people. it can only be spread by droplets that are small enough to breathe in 30. T/F bubonic plague is often characterized by painfully swollen lymph nodes true 31. which form of the plague is highly virulent? what does it target? pneumonic plague is highly virulent and targets the res- piratory system 32. anthrax the distinct black center at the site of infection is a hall- mark of anthrax in- fection 33. gonorrhea is caused by diplococci bacteria 34. T/F chlamydia is an obligate parasite and as such can be grown on agar plates alone false the parasite requires a host 35. gonorrhea 4 / 5

Microbiology Module 5 exam Study online at https://quizlet.com/_d1gwxl cardiac and neu- rological complica- tions 36. syphilis paralysis, blind- ness, and dementia 37. chlamydia infertility and pelvic inflammatory dis- ease 38. Lyme disease Caused by Borrelia burgdorferi 5 / 5

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