Quiz No. 6 - Bacteria and Disease

Quiz 6. Bacteria & Disease Section: ___________ Name: ____________________________ Date: ____________ ____1. Which of the following is a form of symbiotic relationship where one organism benefits from another and at the same time causes harm to the other? A. Parasitism C. Commensalism B. Mutualism D. Synergism ____2. Which of the following provides a continual source of disease-causing microorganisms? A. Reservoir C. Portal of Entry B. Portal of Exit D. Host ____3. Which of the following refers to an individual who harbors the organism for a prolonged period of time after developing the initial infection? A. Asymptomatic carrier D. Convalescent carrier B. Chronic carrier C. Incubatory carrier ____4. A 6-year-old child was brought to the Emergency Room (ER) due to vomiting ang diarrhea a few hours after eating spaghetti that was served at a birthday party. This is an example of which mode of transmission? A. Person-to-person contact C. Vector transmission B. Vehicle transmission D. Airborne transmission ____5. A 25-year-old male had casual sex with a female he met at a party. A week later, he noted purulent discharge coming from his penis. Which of the following is the probable mode of transmission involved? A. Direct contact C. Droplet transmission B. Vehicle transmission D. Vector transmission ____6. Which of the following is the proper order on the stages of an infectious disease process? A. Convalescence, Incubation, Illness, Prodromal, Decline B. Prodromal, Convalescence, Incubation, Decline, Illness C. Incubation, Prodromal, Illness, Decline, Convalescence D. Illness, Incubation, Prodromal, Convalescence, Decline ____7. A 6-year-old child was brought to the Emergency Room because of high grade fever and petechial rashes. Dengue was suspected. Dengue exemplifies which type of transmission? A. Person-to-person contact C. Vector transmission B. Vehicle transmission D. Airborne transmission ____8. A patient was brought to the hospital because of symptoms of tetanus. The disease is due to the bacterium Clostridium tetani, and the manifestations are the effects of tetanospasmin, a neurotoxin produced by the causative agent. Which mechanism of disease production is involved? A. Mechanical C. Immunological B. Chemical D. Hematological ____9. 5-year-old child was exposed to a neighbor who has measles. After 5 days, she started to manifest cough, colds, and conjunctivitis. The time from exposure until the development of the signs and symptoms presented by the child corresponds to which stage of the disease process? A. Incubation period C. Period of illness B. Prodromal period D. Period of defervescence ____10. Which of the following is NOT considered a portal of entry for bacteria? A. Eyes B. Nose C. Mouth D. Intact skin ____11. In the chain of infection, how the organisms move around from one person to another is referred to as which of the following? A. Reservoir C. Portal of entry B. Portal of exit D. Mode of transmission ____12. A 50-year-old diabetic was exposed to a neighbor who had COVID-19. After 5 days, he started to manifest with cough, colds, and difficulty of breathing. The patient can be said to be in which stage of the infectious process? A. Incubation period C. Period of illness B. Prodromal period D. Period of defervescence ____13. Entamoeba histolytica is a protozoan that causes the disease amoebiasis. The organism reaches the intestines and releases enzymes that cause lysis of the underlying tissues causing development of a “flask-shaped” ulcer. This is an example of which mechanism of disease production? A. Mechanical C. Immunological B. Chemical D. Hematological ____14. An individual who is more likely than others to acquire an infection is a: A. Vector C. Fomite B. Reservoir D. Susceptible host ____15. The following are true about the toxin production of bacteria EXCEPT A. Some gram-positive and gram-negative bacteria are capable of producing exotoxins. B. Exotoxins are intracellular metabolites of bacteria released into the surrounding medium. C. Endotoxins are integral components of the outer membrane of gram-negative bacteria. D. Lipid A is the toxic component of the lipopolysaccharide in exotoxin-producing bacteria.