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Most bacteriocidal chemical control agents will kill vegetative cells and endospores.
a. T
b. F
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- Define the following terms: Bactericidal Bacteriostatic AntisepsisWhat are two possible reasons for choosing a bacteriostatic treatment over a bactericidal one? Name the factors that can compromise the effectiveness of a disinfecting agenta.) Infection with this pathogen can result in a wide range of diseases from ear infections to meningitis. Group of answer choices Haemophilus influenzae Francisella tularensis Enterococcus faecalis Naegleria fowleri b.)As with all microbial control methods, the _______ the cells are exposed, the ______ damage accumulates. Group of answer choices longer, less shorter, more longer, more c.) Which of the following wavelengths would NOT be considered ultraviolet radiation? Group of answer choices 360 nm 200 nm 600 nm 25 nm
- a.explanation on how a cultured bacteria should be able to cause disease in healthy organism once inoculated. b.explanation on how the bacteria should be able to reisolated from the experimentally infected host organism and should show similar properties of the original bacteriaThe following are the limitations of Koch's postulates EXCEPT: A. some pathogens cannot grow on artificial media and therefore cannot be identified as the causative agent of the disease B. some diseases involve multiple pathogens which produce similar symptoms making it difficult to pinpoint the causative agent C. some diseases are host-specific and re-inoculation may pose ethical concerns D. some microorganisms are present in the body fluids of the infected animal which make them difficult to be culturedMatch the terminology correctly with the definition in the table below (eg A=1). TERMINOLOGY DEFINITION A. Aerosol 1. Disease caused by pathogen transfer B. Airborne infection 2. Process to kill or remove pathogenic microorganism (not spores) C. Asepsis 3. Organism capable of multiplication D. Decontamination 4. Process to kill/remove all microorganisms including spores and viruses E. Pathogen 5. Thick-walled resting cells formed by Gram+ organisms F. Infection 6. Organism able to cause disease in a host G. Disinfection 7. Suspension in air of finely dispersed solids or liquids H. Viable microorganisms 8. Caused by inhaling airborne material carrying microbial contaminants I. Sterilization 9. Prevention of microbial contamination J. Spores (bacterial) 10. Disinfection or sterilization of contaminated articles
- Below are listed the LD-50 values for toxins from specific isolates of a bacterial species. Which toxin would be considered the "most lethal"?Diptheria toxin . .1 mg/kgClostridium difficile enterotoxin A .5 mg/kgV. cholerae toxin 250 mg/kgB. pertussis toxin 15 mg/kg a)diptheria toxin b)enterotoxin A c)V. cholerae toxin d)B. pertussis toxinWhich of the following is not a factor that should be considered when selecting a antimicrobial drug? A. The nature of the microbe causing the infection B. The overall medical condition of the patient C. The origin of the drug D. The degree of susceptibility of the microbe to that drugThe close organoleptic examination (using the five senses) of a food sample may give valuable information as to the possible microorganisms involved in food spoilage, and which types to look for. ). Give an example of possible causative agents to test for. Why are you considering this microorganism as a possible causative agent?
- a. List the main features of Koch′s postulates. b. Why is it so difficult to prove them for some diseases?Name two methods of control of growth for Mycobacterium tuberculosis pathogen in a patient with the disease and when confronted with the pathogen outside of the host. Be careful to specify if it is a physical method or a chemical method (check lecture to differentiate these two). Control of growth means how would you deal with an infection related to a person as well as how would you minimize the presence of the bacteria on a surface or object.As part of your job in an international pharmaceutical company you are given the task of: a) Developing a cheaper method for the production of vitamin C b) Developing a live cholera vaccine Describe how you would accomplish these tasks