BIO204 Exam 2 Select the microorganism transmitted specifically by the human bod

Question

BIO204 Exam 2 Select the microorganism transmitted specifically by the human body louse. Select one. A. Coxiella burnetii B. Rickettsia prowazekii C. Borrelia burgdorferi D. Leptospira interrogans E. Nocardia asteroides can grow in di 2. Pseudomonas aeruginosa is a major cause of nosocomial infection, cleaning solutions, and infections may yield a fruity aroma. A. True B. False 3. The presence of this enzyme is used to differentiate between staphylococcus and streptococcus. Select one. A. Hydrogenase B. Coagulase C. Catalase D, DNA gyrase E. Protease 4. Humans are the main reservoir for Staphylococcus aureus. The is the main site of colonization and approximately of people are colonized at any one time. A. Skin, 90% B. Nose, 30%. C. Hands, 60% D. Mouth, 40% E. Intestinal tract, 30% 5. Staphylococcus aureus colonizes the vagina of5% ofwomen. This specific site of colonization predisposes women to what disease? Select one. A. Urinary tract infection with S aureus B. Toxic Shock syndrome C. Meningitis D. Septicemia E. Scalded skin syndrome 6. Which of the following factors predisposes one to disease caused by Staphylococcus aureus? Select one. A. Fecal contamination of water B. Heavily contaminated environment C. Unprotected sexual activity D. Healthy immune system E. Exposure to aerosolized antibodies

Explanation / Answer

1.B

Several of the infectious diseases associated with human lice are life-threatening, including epidemic typhus, relapsing fever, and trench fever, which are caused by Rickettsia prowazekii, Borrelia recurrentis, and Bartonella quintana, respectively.

2.true

3.C catalase

Streptococcus is catalase negative whereas staphylococcus is catalase positive.catalase is an enzyme used by bacteria for reduction of hydrogen peroxide to water and oxygen.

4 option b.nose and 30%

Staphylococcus aureus is found in humans in the nose,groin,axillae, perineal area (males),mucous membranes,the mouth,mammary glands,hair,and the intestinal, genitourinary and upper respiratory tract.

5.B

6.b

7.coagulase negative.all staphylococcus species are coagulase positive except these two organisms.

8.option C

9.D it is gram positive bacteria.

10.E

S.pneumoniae resides asymptomatically in healthy carriers typically colonizing the respiratory tract,sinuses,and nasal cavity.

11.C

12.D

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