Microbiology Exam 4 Practice Questions With 100% Correct Questions And Answers

Microbiology Exam 4 Practice Questions With 100% Correct Questions And Answers Which of the following is NOT an advantage of live attenuated vaccine agents? a. They elicit lifelong immunity b. They stimulate by cell-mediated and humoral immune responses c. They never revert to virulent forms d. They require few or no booster immunizations e. The immune response generated by the vaccine closely mimics a real infection. - c. they never revert to virulent forms In order to view Treponema pallidum, the causative agent of syphilis, under the microscope, you can tag the specimen with an antibody-flourescein dye complex and look under a microscope that projects UV light onto the specimen. What test are you using? a. Western blot test b. Fluorescence antibody (FA) test c. Kirby-Bauer disc diffusion test d. ELISA test e. Agglutination test - b. fluorescence antibody (FA) test Which of the following immunodiagnostic tests uses antibody or antigen attached to latex beads? a. Direct agglutination test b. Indirect fluorescence antibody (FA) test c. Indirect ELISA test d. Direct ELISA test e. Passive (indirect) agglutination test - e. passive (indirect) agglutination test Diseases that primarily exist in animals, but may be transmitted to humans are called... a. Helminthic b. Zoonotic c. Symbiotic d. Epidemic e. Parasitic - b. zoonotic Which of the following is incorrectly matched? a. Latent infection: disease that goes into hiding but can cause periodic outbreaks b. Acute infection: short-lasting illness c. Primary infection: an initial illness d. Opportunistic infection: an asymptomatic carrier state e. Chronic infection: disease that lasts a long time - d. opportunistic infection: an asymptomatic carrier state The body and its microbiota have a relationship that... a. usually leads to parasitism b. is never beneficial to either c. generally has a negative tone d. is an example of a symbiosis e. is established in utero - d. is an example of a symbiosis All of the following are generally used in vaccines EXCEPT... a. toxoids b. parts of bacterial cells c. live, attenuated viruses d. inactivated viruses e. antibodies - e. antibodies A reaction between an antibody and soluble antigen-forming lattices is called a(n)... a. agglutination reaction b. complement fixation c. immunofluorescence d. neutralization reaction e. precipitation reaction. - e. precipitation reaction A DNA plasmid encoding a protein antigen from West Nile virus is injected into muscle cells of a horse. This is an example of a(n)... a. subunit vaccine b. conjugated vaccine c. DNA vaccine d. attenuated whole-agent vaccine e. live whole-agent vaccine. - c. DNA vaccine What type of vaccine is the live, weakened measles virus? a. conjugated vaccine b. subunit vaccine c. nucleic acid vaccine d. attenuated whole-agent vaccine e. toxoid vaccine - d. attenuated whole-agent vaccine Which item is a direct ELISA test screening for? a. substrate for the enzyme b. antigen c. antihuman immune serum d. antibodies against the antigen - b. antigen Which of the following tests is MOST useful in determining the presence of AIDS antibodies? a. agglutination b. complement fixation c. neutralization d. indirect ELISA e. direct fluorescent-antibody - d. indirect ELISA Why is it difficult to treat viral infections? - - It is difficult to treat a viral infection because the virus becomes so well integrated with the host genome that inhibiting the virus also inhibits the host cells • why antibiotics/most drugs are useless