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57 Cards in this Set
- Front
- Back
gentamicin is what type of antibiotic?
A. Cephalasporin B. Aminoglycoside C. Tetracycline D. Antimetabolite E. Penicillin |
B
Gentamicin is an aminoglycoside |
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What does a high anti-streptinolysin 0 titer indicate?
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A recent fever by group A streptococcus
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Bacterial Pnemonia is most often caused by what organism?
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Strep. Pneumoniae
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An anaerobic energy extracting mechanism called anaerobic respiration the final electron acceptor is:
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Inorganic oxidized compound like nitrates
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An organism which can survuve and grow either in the presence of or in the absence of oxygen is called what?
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Faculatative
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name a neurotoxin
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botulinum
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What is a toxoid made from?
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Exotoxins
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What condition is septic shock most often associated with?
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Gram (-) negative bacteria
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The extended use of a broad-spectrum antibiotic often leads to the development of a secondary infection by what?
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Normal flora yeast such as candida
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Most of the bacteria that produce bacterial pneumonias are noted for their production of:
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capsules
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What do gas gangrene, tetanus, and botulism all have in common?
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Each disease is produced by species of clostridium
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The gram reaction is based on what characteristic?
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Cell wall structure
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Group A streptococci (strep pyogenes) produce what type of hemolysis?
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Beta hemolysis
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Bacterial conjugation requires:
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Sex pilus and plasmid
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Conjugation between an F+ bacterial cell and an F-bacterium involves the transfer of what genetic elements?
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plasmid from F+ cell to F- cell
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What bacterial structure determines the shape and rigidity of the bacterial cell?
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Cell wall
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Blood agar is an example of what type of laboratory medium?
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Enriched medium
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To isolate a thermophilic organism what should you do?
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Expose culture to 80 degrees C for 10 minutes
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An organism has grown in a medium containing mannitol and under anaerobic conditions when you test the medium you find that the pH has fallen from 7.0 to 4.1, what is a valid conclusion?
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The organism has grown and has carried out anaerobic respiration using mannito as the final electron donor
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An organism that you isolated on an enriched laboratory medium containing sterois was shown to have all of the characteristics of a prokaryotic cell but lacks a cell wall. This organism is most likely to belong to what microbic group?
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Mycoplasma
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Finding large numbers of acid fast bacteria in a sputum sample would be consistent with a diagnosis of what disease?
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Tuberculosis
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Susceptibility to inactivation of a virus by ether is indicative of what?
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The virus has a lipid envelope
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What is the gram (-) negative reaction and cell structure of the genus Neisseria?
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Gram (-) diplococci
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What is most closely correlated to pathogenic, virulent strains of traphylococci?
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Coagulase production
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What is/are the structure(s) responsible for motility in bacteria?
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Flagella
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What are plasmids?
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Small, circular pieces of extrachromosomal DNA found in some bacterial cells
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Which of the following bacterial genera produces endospores and grows aerobically?
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Bacillus
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The electron transport system cytochromes are located where in a bacterial cell?
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Cell membrane
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Bacterial cells usually reproduce by what method when growing in culture?
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Binary fission
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A bacterial cell carrying a fertility factor (sex factor) plasmid free in the cytoplasm would be designated as:
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an f+ cell
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Bacterial cells usually reproduce by what method when growing in culture?
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binary fission
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What type of mutagenic agent produces thymine dimers in the DNA?
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UV radiation
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If you isolated Gram-negative diplococci from cerebrospinal fluid you could make a tenative diagnosis of infection by what genera?
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Neisseria
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What produces a gas gangrene type of myonecrotic lesion?
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Clostridium perfringens
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Treponema pallidum has what cell shape and causes what disease?
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Spirochete; syphilis
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Gram stain of a blood culture from a 40 year old male patient with suspected subacute bacterial endocarditis reaveals gram positive cocci in chains. When plated on blood agar the organism grew and showed alpha-type hemolysis and was not inhibited by an optichin disc. What is the most likely causative organism?
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Oral streptococci of the viradans group
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What is descriptive of the family enterobacteriaceae?
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gram negative found in the GI tract
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What are the bacterial disease causative agents for severe diarrhea
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Escherichia causes severe diarrhea
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What are the bacterial disease causative agents for toxic shock syndrome?
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Staphylococcus causes toxic shock syndrome
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What are the bacterial disease causative agents for gas gangrene?
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Clostridium causes gas gangrene
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What are the bacterial disease causative agents for cholera?
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Vibrio causes cholera
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What are the bacterial disease causative agents for menigococcemia?
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Neisseria causes menigococcemia
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What are the bacterial disease causative agents for diptheria?
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corynebacterium causes diptheria
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What are the bacterial disease causative agents for gonorrhea
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Neisseria causes gonorrhea
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What are the bacterial disease causative agents for syphilis?
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Treponema causes syphilis
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What are the bacterial disease causative agents for anthrax?
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Bacillus causes anthrax
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What kind of diagnostic test would you use to check for S. aureus infection
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Coagulase production
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What kind of diagnostic test would you use to check for streptococcal pneumonia?
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Optichin disc
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What kind of diagnostic test would you use to check for strep throat?
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Beta hemolysis on blood agar
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What kind of diagnostic test would you use to check for gonorrhea?
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Gram negative diplococci in exudase
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What kind of diagnostic test would you use to check for tuberculosis
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Acid fast organisms in sputnum
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A growing culture of bacteria in log phase was inoculated at 6 PM into growth medium. They endered the log phase at 7 PM, and divided every 30 minutes. If the culture reached a cell concentration of 10 to the 9th per ml at 12 midnight, at what time was growth one-half of the maximum?
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11:30
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Which of the following is caused by a protozoan?
a. diptheria b. poliomyelitis c. malaria d. psittacosis e. epidemic typhus |
C. malaria ?
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In general, when is a culture of bacteria most susceptible to a lethal agent?
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In the logarithmic phase of growth ?
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Energy-yielding reactions are referred to as anaerobic respiration if the final hydrogen acceptor is:
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inorganic compound other than atmospheric oxygen
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After growth of an organism a nutrient broth + lactose tube you detect the following compounds present in the broth lactic acid, succinic acid and CO2, what is an appropriate conclusion?
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The organism produces a lactase and derives its energy by a heterolactate fermentative pathway
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Temperate bacteriophage have what special characteristic?
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The ability to insert viral DNA sequences into the host cell genome
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