MT AAB Study guide questions and answrs(latest upate)

What term describes the morphology of organisms that vary in shape and size? Pleomorphic i.e. coccobacilli What term describes the morphology of organisms that vary in shape and size? Pleomorphic i.e. coccobacilli Bacteriology arrangements: -pairs (diplococci "N. Gon"; diplobacilli -chains (streptococci, streptobacilli) -grape like clusters (staphylococci) -group of four-tetrads (peptococcus) -packets of eight-cuboidal (sarcina) -palisades (corneybacterium) Bacteriology arrangements: -pairs (diplococci "N. Gon"; diplobacilli -chains (streptococci, streptobacilli) -grape like clusters (staphylococci) -group of four-tetrads (peptococcus) -packets of eight-cuboidal (sarcina) -palisades (corneybacterium) Capsules are the basis of which test? serotyping and identification (capsules are antigenic); they are observed using India ink (negative staining) representative organisms (Strep pneumo, Kleb pneumo, Haemophilus influenza, and Neisseria meningitidius) Capsules are the basis of which test? serotyping and identification (capsules are antigenic); they are observed using India ink (negative staining) representative organisms (Strep pneumo, Kleb pneumo, Haemophilus influenza, and Neisseria meningitidius) A mucoid colony on blood agar medium indicates that which of the following characteristics may be present? Organism has a capsule. -it surrounds some bacteria A mucoid colony on blood agar medium indicates that which of the following characteristics may be present? Organism has a capsule. -it surrounds some bacteria What are dark staining granules called? Metachromatic granunles -affinity for basic dyes -stains such as Albert, Neisser, and methylene blue What are dark staining granules called? Metachromatic granunles -affinity for basic dyes -stains such as Albert, Neisser, and methylene blue Which of the following organisms are non-motile? Shigella and Klebsiella (with exception to Salmonella--other "ella" are nonmotile) Shigella (neg) vs Salmonella (pos) Klebsiella (neg) vs Enterobacter (pos) Bacillus anthracis (neg) vs most bacillus species (pos) best observed at 25C 35-37C ,au be inhibitory Which of the following organisms are non-motile? Shigella and Klebsiella (with exception to Salmonella--other "ella" are nonmotile) Shigella (neg) vs Salmonella (pos) Klebsiella (neg) vs Enterobacter (pos) Bacillus anthracis (neg) vs most bacillus species (pos) best observed at 25C 35-37C ,au be inhibitory In the bacterial growth cycle, growth ceases because nutrients are exhausted or toxic metabolic products have accumulated in which phase? Stationary phase (plateau ceases-nutrients exhausted/toxic) In the bacterial growth cycle, growth ceases because nutrients are exhausted or toxic metabolic products have accumulated in which phase? Stationary phase (plateau ceases-nutrients exhausted/toxic) Which of the following genera of bacteria form spores? Bacillus and Clostridium endospores-non feeding, non motile, non reproductive -highly resistant to heat, drying, freezing; toxic chemical & radiation. (Sporulating bacteria-bacteria in which spores are forming) Which of the following genera of bacteria form spores? Bacillus and Clostridium endospores-non feeding, non motile, non reproductive -highly resistant to heat, drying, freezing; toxic chemical & radiation. (Sporulating bacteria-bacteria in which spores are forming) What term is used to describe bacteria that grow in the absence of atmospheric oxygen and obtain oxygen from oxygen-containing compounds? Anaerobes What term is used to describe bacteria that grow in the absence of atmospheric oxygen and obtain oxygen from oxygen-containing compounds? Anaerobes Aerobes grows in presence of (free) O2 Aerobes grows in presence of (free) O2 Capnophiles growth enhanced by increased CO2 Capnophiles growth enhanced by increased CO2 aerotolerants does not grow well but tolerate (survive) in presence of oxygen aerotolerants does not grow well but tolerate (survive) in presence of oxygen What is the temperature at which bacteria grow best known as? Optimum What is the temperature at which bacteria grow best known as? Optimum mesophilic grows best 35-37C; most organisms will grow at 20C mesophilic grows best 35-37C; most organisms will grow at