Study guides, Class notes & Summaries

Exposure to 63℃ for 30 minutes or 72℃ for 15 seconds are recognized ways to ________. Correct Answer-pasteurize You observe that you can kill 1 × 106 C. botulinum endospores in 3.0 minutes by heat treatment at 121℃. What is the decimal reduction time (D121 value)? Correct Answer-30 sec Which of the following types of microbes would be most resistant to killing by germicides? Correct Answer-bacterial endospores The use-dilution test and Kelsey-Sykes capacity test are methods desig...

Developed Small Pox immunization A. Leeuwenhoeck B. Pasteur c. Snow D. Jenner E. Redi F. Flemming G. Ehrlich H. Lister I. Kock J. Semmelweiss Correct Answer-D Sought Magic Bullet A. Leeuwenhoeck B. Pasteur c. Snow D. Jenner E. Redi F. Flemming G. Ehrlich H. Lister I. Kock

Increasingly difficulty in breathing with a nonproductive cough, fever, chills, chest discomfort, weight loss, and tachycardia are signs and symptoms of which disease? Correct Answer-Pneumocystis pneumonia What is the causative agent of pneumococcal pneumonia? Correct Answer-Streptococcus pnumoniae Coccidioidomycosis is caused by what kind of organism? Correct Answer-Fungus In what way does a person contract pertussis? Correct Answer-Inhalation of respiratory droplets Erythromycin is...

Ocular lens Correct Answer-Eyepiece, adds 10x magnification 4x Correct Answer-red lens resolving power Correct Answer-The ability of a microscope to differentiate two closely spaced objects as being distinct from one another (as magnification inc, rp inc) resolving power of a light microscope Correct Answer-0.2 micrometers (μm) numerical aperture Correct Answer-The ability of a lens to gather light parfocal Correct Answer-A specimen in focus under a lower power objective lens sh...

Know the lower limit of resolution for the light microscope Correct Answer-0.2 um Total magnification vs magnification of the oil immersion lens Correct Answer-Total magnification: product of the magnification of the ocular (10x) and the objective lens Oil immersion lens Define Resolving power Correct Answer-the ability of a microscope to differentiate two closelyk spaced objects as being distinct from one another Know how resolving power relates to magnification Correct Answer-Resolvi...

A case in an outbreak of dysentery was defined as a patient in a psychiatric rehabilitation center in Taipei, Taiwan, who had diarrhea (loose stools three and more times a day in the past week and who had tested positive for the dysentery bacillus, Shigella sonnei, and that had blood in the feces. For precise analysis of the outbreak, what additional information is needed for a proper case definition? Correct Answer-No further information is needed for the case definition. During 2015, state ...

*magnification of oil immersion lens Correct Answer-100x 1.25 Lower limit of resolution with a light microscope Correct Answer-.2 um What does parfocal mean? Correct Answer-When you have the object in focus with one objective. It will be visible on all objectives with just a minor adjustment from the fine adjustment knob - a specimen in focus under the low power objectives (4x or 10x) should be nearly in focus under the oil immersion objective as well Relationship between resolving po...

Objective of oil immersion lens Correct Answer-100X Resolving power becomes _____ as magnification of the objective lens _______ Correct Answer-Greater, increases The light microscope can distinguish two points that are at least _____ um apart Correct Answer-0.2 What is used to sterilize heat sensitive liquids? Correct Answer-Filtration The streak plate technique uses spatial dilution (Increases the space b/t organisms) to create Correct Answer-pure colonies The component of MacCo...

Developed smallpox immunization using cowpox agent Correct Answer-Edward Jenner Sought a "magic bullet" to destroy pathogens & not host Correct Answer-Paul Ehrlich Discovered penicillin Correct Answer-Alexander Fleming Pioneered aseptic surgery, Prevented surgical infections by using mists of phenol Correct Answer-Joseph Lister Father of Epidemiology (Cholera in London) Correct Answer-John Snow Pioneered asepsis by discovering that hand washing prevented streptococcal infection...

What is the total magnification if you use the 40x objective lens? a. 4x b. 40x c. 400x d. 4000x Correct Answer-c. 400x What is the ability of a lens in a light microscope to gather light? a. Numerical Aperture b. Magnification c. Resolving power d. Working distance Correct Answer-a. Numerical Aperture Who is the father of bacteriology and protozoology? a. Andre Michel Lwoff b. Antonie Van Leeuwenhoek c. Lourrens Baas Becking d. Fredrick Pier Correct Answer-b. Antonie Van Le...