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- Question 20 Culture media must be: A agar sterile c) selective D chemically completeQUESTION 15 The incubation period is: When mild symptoms begin to appear O The time after exposure to a pathogen when there are no symptoms When the symptoms are the worst O When healing begins QUESTION 16 The ID50: O Shows how strong a toxin is O Shows how many microbes are needed to cause infection in most cases Shows if a microbe produces a toxin O Shows how many hosts will die Click Save and Submit to save and submit. Click Save All Answers to save all answers. Type here to searchQuestion 5  Antibiotic resistance might be assumed if 1. bacterial colonies are present on a streptomycin negative plate 2. bacterial colonies are present on a streptomycin positive plate 3. bacterial colonies are absent on a streptomycin negative plate 4. bacterial colonies are absent on a streptomycin positive plate
- QUESTION 12 Although this organism is a normal resident of the skin microbiota, it can cause infections post-surgery, particularly with medical device implants. O Staphylococcus epidermidis O Escherichia coliQuestion 22 A student is asked to identify which pathogen is causing a patient infection. The student conducts a Gram stain and determines th= organism does not staining very well. Assuming the organism produces mycolic acid, an Acid fast stain is performed and the studen determines that the organism is Acid fast positive. Which pathogen does this describe? O Clostridium botulinum O Prion O Haemophilus influenza O Mycobacterium tuberculosis Question 23 A patient has an infection caused by a bacterial species that produces toxins that are capable of breaking down DNA and dissolving hvaluronicacid. Which disease does this nerson have?. 12 esc 吕0 FI II F7 F9 F10 F12QUESTION 33 The primary xenobiotic degrading genus are: O a. Staphlococcus O b. Streptococcus O c. Pseudomonas O d. Salmonella
- Question 12 (1 point) Listen You are working in the lab with Streptococcus pyogenes and two other bacteria. You streak all three of these microbes onto a Blood Agar plate and observe the following: All of the bacteria grow on the plate but there is a large zone of clearing around S. pyogenes, and no zone of clearing on the other two bacteria. Based on these results what type of Medium is Blood Agar? O A) Blood agar is a culture medium. B) Blood Agar is a selective medium. C) Blood agar is a differential medium. O D) Blood agar is an exclusion medium. O E) Blood agar is a counting medium. 98% 99+Please answer asapQuestion 1 Inoculation for bacterial growth in an agar petri dish requires A. Incolating one species of bacteria per dish B. Host tissue so the bacteria can grow inside C. That the agar have nutrients D. Incubation in proper temperatures
- Question 2 MSA is a selective medium and contains a higher salt concentration, a pH indicator and Mannitol sugar. Which of the following makes it selective me Staphylococci? OA Mannitol O B. PH indicator OC Agar O D, SaltQUESTION 13 Pathogenicity is: O Virulence O Normal microbes living in the body O The ability of a microbe to cause disease O The ability of the body to avoid infection QUESTION 14 A zoonotic disease is: O Transferred from human to human O Not infectious O Transferred from animals to humans O Transferred from nonliving sources to humans Click Save and Submit to save and submit. Click Save All Answers to save a e Type here to searchQuestion 3 Cells have evolved methods of repairing UV irradiation damage. All of the following are repair mechanism for UV damage EXCEPT (which is false?) O excision repair O activation of photolyase O light repair O dark repair O increased protein synthesis to replace denatured proteins Question 4