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43 Cards in this Set
- Front
- Back
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What are bacteria called that exist in oceans and spoiled food at freezing to 45 degrees F?
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Psychrophils
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How do you describe a bacteria that produces acid as it grows?
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Acidogenic
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How do you describe a bacteria that survives in acid
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Aciduric
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What pH readiing is considered neither acidic or basic?
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7
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What pH is human blood?
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7.4
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What bacterias grow in the presence of oxygen?
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Obligate aerobes, microaerophiles and facultative anaerobes
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Most bacteria in the mouth are __________ and ______________based on their requirement for oxygen.
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Obligate anaerobes or facultative anaerobes
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Bacteriostatic describes an agent that only stops the growth of microorganisms but does not kill them. True or False
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True
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Bactericidal means
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Bacteria are killed
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Viruses can live on their own without a host. True or False?
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False. They need a host
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What is the protein coat of a virus called?
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Capsid
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The virus takes over a host and tells it to ______the virus.
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Replicate
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Antibiotics cannot kill a virus because viruses have no_____
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Cell wall
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What two ways can you contain or slow advance of a virus?
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Immunization and infection control
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A virus can be killed when it is outside the body. True or False
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True. Virus cannot be killed inside the body
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Candida Albicans causes what fungus?
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Thrush
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Why do many older people get thrush and stomatitis?
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Body defenses are depressed
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An endogenous infection comes from organisms inside or outside the body?
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Inside
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An exogenous infection comes from organisms inside or outside the body?
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Outside
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Who was the first to observe tooth scrapings and gutter water under a microscope?
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Antoni VanLeeuwenhoek
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True or False: Bacteria are made up of more than one cell.
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False
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In the bacteria, strep mutans, what is the genus or family name
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Streptococcus
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Gram negative bacteris when stained turn what color?
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Red or pink
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Morphology means
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Shape
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What part of bacterial cell gives it shape and keeps it from being crushed?
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Cell wall
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Cocci are what shape
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Spherical
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Which type of bacteria measures the longest?
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Spirilla
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What liquid term describes cytoplasm?
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Viscous
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The cytoplasmic membrane has what function? Regulates cell_______
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Pressure
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Name eample from dentistry of cleaning agent that acts on the cytoplasmic membrane
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Antimicrobial chlorhexidine, antibacterial hand cleaners
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Does being placed on an antibiotic for a strep infections immediately kill all the present bacteria?
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No, it prevents any more from being made
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True or false: Antibiotics work by acting on the cell wall to prevent synthesis
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True
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Which has an outer membrane? Gram negative or gram positive organisms?
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Gram negative
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Endotoxins are found in the ______ _________.
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Outer membrane
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What do endotoxins cause in the person being infected?
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Fever, bleeding, vomiting, bone destruction
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Give example in the mouth of disease where endotoxins destroy bone
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Periodontal disease
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What part of the cell produces the capsule?
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cytoplasmic membrane
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What part of the bacteria helps it move?
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Flagella
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What part helps it attach to other cells
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Fimbria or pili
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Why are spores used to determine if autoclave is killing germs?
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The are one of most resistant forms of life. If they are killed in autoclave, other microorganisms will be too
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True or False: Spores have a very short life
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False, they can lie dormant for yhears
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Mad cow disease is causesd by a protein substance called
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Prion. can't kill a prion
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What are bacteria called that most affect the human body as far as temperature goes?
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Mesophils (22-45C. 98.6 F)
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