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module 5 exam - bio171 microbio Study online at https://quizlet.com/_b2us3i 1. The concept of treating all samples, whether known or unknown, as potentially hazardous (or pathogenic) materials is known as _____. universal precau- tions 2. List at least 3 observations a researchers would be sure to note while assessing an unknown microbial sample. size and shape, motility, gram sta- tus, color change, chemical reactions 3. While observing an unknown sample of limited amounts, a researcher must determine motility and Gram status using the same sample. What would you determine first and why? Motility because Gram staining re- quires the sam- ple be fixed which would kill the or- ganism and then you can't observe motility 4. a Facultative anaerobe is a microorganism capable of growth under what conditions? A microorganism capable of growth under aerobic and anaerobic condi- tions 5. as streptococcus is catalase negative would it thrive or die in the presence of peroxides? Why? strep would not survive in the pres- ence of peroxides b/c it is unable to breakdown perox- ides 6. strep is most often streaked onto: 1.) chocolate agar 2.) EMB agar 3.) Blood agar 4.) Spirit blue agar blood agar 7. false 1 / 6

module 5 exam - bio171 microbio Study online at https://quizlet.com/_b2us3i True or false: the Lancefield groups are used to subdi- vide antigenic groups of alpha-hemolytic Steptococ- cus 8. The distinctions for Lancefield groupings lie in its Carbohydrate composition of antigens 9. left untreated, strep throat can progress to___, which displays ___ hemolytic activity. Rheumatic fever ; beta 10. Rheumatic fever displays (blank) hemolytic activity and occurs when (blank) is left untreated Beta, strep 11. True or false: under most circumstances, staphylo- coccus can be found in ~80% of the human population where it remains non-symptomatic false 12. Define commensal bacteria It neither harms nor benefits from the host from which it obtains nutrients 13. pathogen suppresses host immune system so it can continue replicating evasion 14. pathogen passes through or between cells to access deeper tissues and nutrients infection 15. pathogen is passed to another host to restart lifecycle transmission 16. Match the following diseases with their respective symptoms: 1. folliculitis 2. scaled- skin syndrome 3.impetigo 4.conjuctivitis 5.opthalma neonatorum 1.) D 2.) E 3.) A 4.) B 5.) C 2 / 6

module 5 exam - bio171 microbio Study online at https://quizlet.com/_b2us3i A. Childhood skin disease near mouth/ nose B. infection of thin, transparent scleral tissue C. infection occurs at time of birth D. Pus-filled lesions on skin or hair E. Ruptured pustules ; treated with penicillin 17. True or false. The causative agent of conjunctivitis can be either bacterial or viral true 18. True or false: An acid fast stain is best suited to iden- tify TB true 19. True or false: Although TB must be inhaled and reside in the lung in order to cause infection, TB can also spread to the brain, spine, and kidneys true 20. Identify the disease based on the following: it is a small, acid-fast rod usually remaining asympto- matic for up to 20 years. It affects the skin, nerves, up- per respiratory tract, and eyes of infected individuals Leprosy/Hansen's disease 21. True or false: you can become infected with TB simply by sharing a drink with someone who is currently infected with TB false 22. True or false: only directly ingesting the pre-formed Clostridium toxin (neither the bacteria nor its spores) will cause disease in adults true 23. True or false : Directly ingesting clostridium or its associated spores will not cause illness in adults false 24. A 5-month-old child is given honey at breakfast and begins showing symptoms consistent with botulism. Would the child's illness be classified as foodborne, infant or wound botulism? Infant Botulism ; the GI tract of an infant is not developed enough to handle honey which is a carrier of clostridium 3 / 6

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module 5 exam - bio171 microbio Study online at https://quizlet.com/_b2us3i 25. True or false: there are currently no cures for tetanus true 26. While visiting his grandparents, a 10-year-old child has been given green beans for dinner that were har- vested from his grandparents' garden and canned the previous year. Severe illness sets in and the child is taken to the hospital. Botulism is suspected, but what form? Explain Foodborne botu- lism because he's too old for it to be infant and it's not a wound so the green beans were probably im- properly canned 27. True or False. Although there is no cure for tetanus, it can be prevented through vaccination. true 28. Why does the alpha toxin (perfringolysin) produced during an infection of gas gangrene cause cell death? (short answer) The toxin perfo- rates the mem- brane. It forms pores in the plas- ma membrane of host cells resulting in uncontrolled ion fluxes and eventu- ally cell lysis and death 29. The alpha toxin perfringolysin is associated with which medical condition caused by Gram positive anaerobic bacteria? Gas gangrene 30. True or false : Bubonic plague is often characterized by Gas gangrene painffully swollen lymph nodes true 31. Which form of the plague is the most rare? what does it target? Septicemic and it targets the blood system 32. indentify the following disease : " bulleyes rash" lyme disease 4 / 6

module 5 exam - bio171 microbio Study online at https://quizlet.com/_b2us3i ( RED MARK IN MIDDLE WITH SURROUNDING RED HALO) 33. syphillis is caused by : gram negative spirochete 34. True of false. Chlyamida is an obligate parasite and as such can bee grown on agar plates alone false 35. match the following disease with their respective symptoms if left untreated : 1.) Gonorrhea' 2.) Chlamydia 3.) Syphilis 1.) Gonorrhea - C (cardiac and nuero complications) 2.) Chlamydia - A ( Paralysis, blind- ness and demen- tia 3.) Syphili's - E ( Infertility and pelvic inflammato- ry disease) 36. You developed a fever, chills, and pneumonia after recently returning from a getaway weekend where you sat in a hot tub. What disease would a doctor suspect? Would the doctor suspect you got it from another person? Legionaires and no 37. Which form of the plague is highly virulent? What does it target? Pneumonic plague and the respiratory system 38. identify the following disease (hand with black center at site of infection) (short answer) anthrax 5 / 6

module 5 exam - bio171 microbio Study online at https://quizlet.com/_b2us3i 39. Gonorrhea is caused by Diplococcic bacte- ria 40. True or False: Chlamydia trachomatis can be grown on an agar plate alone false 41. Greater than 90% of all human streptococcal infec- tions belong to (multiple choice) group A 42. Syphilis is caused by gram negative spirochete 6 / 6

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