41. The normal (resident or indigenous) microbiota of an animal body does all of

Question

41. The normal (resident or indigenous) microbiota of an animal body does all of the following except: B. Helps in training and development of the host immune system. C. Contributes to nutrition and normal physiology D. Contributes to normal anatomy E. Microbes do all of the above. A. Antagonizes pathogens 42. Concening different types of microbes, which of the following is false? A. Clostridium tetani produces spastic paralysis ("lock jaw") B. all viruses are "filterable infectious agents" as described by Iwanowski C. fungal spores are propagules for spread &reproduction; D. Bordatella pertussis produces whooping cough and a vaccine is available E. Clostridisam perfringens produces gas gangrene 43. Which of bncfolouifal cering diferaces between spirochetes and spirila? A. Spirilla have flexible walls. B. Spirochetes are motile by internal axial filaments (endoflagella). C. Spirilla are motile by external flagella. D. The spirochete structure is well suited for penetration of mucus membranes/skin. E. The agents of syphilis, Lyme disease and infectious jaundice are spirochetes. 44. All of the following are true of Louis Pasteur except A. Contributed to development of the "germ theory of disease." B. Developed "Pasteurization. C. Studies of fermentations and anaerobic life. D. First to develop multiple ways to make pathogens into vaccines E. All of the above are true Which of the following is false concerning vaccines for Streptoccus pmewmoniae and onia? A. Vaccines are isolated polysccharides (e.g, PV13, PV23). Conjugated with protein for children (Prevnar) and in Adult Prevnar Produce oposonizing antibodies that will coat invading pneumocoeci of the same types as in the vaccine. The vaccine may produce pneumonia in some recipients Opsonins coat microbes facilitating phagocytosis (via Fe receptors) and destraction 46. Which of the following is false concerning the following disease agents? A·The rickettsas are arthropod borne and transmitted. B. Chlamydias are relatives of mitochondria. C. Mycobacterium leprae causing leprosy is non-cultivable in vitro. D. Corynebacterium diphtheria may kill by suffocation or multi-organ failure (exotoxin). E. Streptococeus pmeumoniae causes lobar pneumonia, otitis media and meningitis.

Explanation / Answer

Question 41.

Answer. D

Question 42.

Answer. B

Explaination : All viruses are not filterable.

Question 43.

Answer. A

Explaination : Spirilla have rigid walls.

Question 44.

Answer. A

Explaination : The germ theory was proposed by Girolamo Fracastoro in 1546, and expanded upon by Marcus von Plenciz in 1762.

Question 45.

Answer. D

Question 46.

Answer. B

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