9. Typhoid Marwns an example of what type of disease carrier? asymptomatic b) ch
ID: 217039 • Letter: 9
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9. Typhoid Marwns an example of what type of disease carrier? asymptomatic b) chronic c) convalescent d) incubation e) passive n example of the direct 10. Communicable diseases can spread by several methods. Which is not a transmission mode of disease spread? ) fine droplets sprayed directly upon a person b) bites from biological vectors c) contact with contaminated food d) sexual intercourse e) placental transfer 11. M ost areas of the body in contact with the outside environment harbor microbes, and internal organs, tissues, and fluids are microbe-free transients are microbes that occupy the body for short periods c) residents are microbes that become established in the body d) all of the above e) none of the above 12. Bacterial flora benefit the host by; a) preventing overgrowth of harmful microbes b) preventing microbial antagonism c) all of the above d) none of the above 13.Regarding the normal flora (microbiome or microbiota); a) variations in flora distribution are due to shifting environmental conditions normal resident microbes are present in the lungs c) all of the above none of the above d) part of the body that is not natural to them are; 14. Pathogens that cause disease when the host's defen ses are compromised or when they grow in true pathogens b) opportunistic pathogens c) virulent pathogens d) unlikely pathogens 15.The severity of a microbial disease depends on the virulence of the non-pathogen. T or F 16. The characteristic or structure that contributes to the ability of a microbe to cause disease is a virulence factor T or F 17.STORCH pathogens include; Syphilis, Toxoplasmosis, and a) hepatitis B, AIDS and chlamydia ) rubella, cytomegalovirus c) herpes simplex virus d) all of the above e) none of the above 18. An Infectious Dose (ID) is the maximum number of microbes required for infection to proceed T or F 19, Microbes with small IDs have lower virulence T or F 20. An infection indigenous to animals but not transmissible to humans is a Zoonosis T or F 21. The Morbidity rate is the total number of deaths in a population due to a certain disease T or F 22. Mortality rate is the number of people afflicted with a certain disease T or F 23. Exoenzymes dissolve extracellular barriers and penetrate through or between cells T or 24. Toxigenicity is the capacity to produce toxins at the site of multiplication T or F 25, Exotoxin: A toxin that is not secreted but is released after the cell is damaged, is composed of the lipopolysaccharide (LPS), part of the outer membrane of gram-negative cell walls. T or FExplanation / Answer
9. b) Typhoid marry was an example of chronic disease carrier.
10. c) contact with contaminated food is not an example of direct mode of spread of communicable disease.
11. d) All the above statements are true as we have residents, transients, and our internal organs and body fluids are microbe free.
12.c) Bacterial flora help the host by preventing the microbial antagonism and by preventing the overgrowth of harmful microbes.
13.
14.b) Opportunistic pathogena are microbes that are generally commensal but become infections when host's resistance is low.
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