MLT 107 Unit 3 WT2 Army / Navy Lab Tech
68K UPDATED ACTUAL Exam Questions
and CORRECT Answers
Microbiologists must be able to distinguish between these 2 categories of bacteria to reduce time
and cost of diagnosis - CORRECT ANSWER - "Usual" "Common" Resident Flora
And
Pathogens
MacConkey Agar Distinguishes between - CORRECT ANSWER - Lactose fermenters and
lactose non-fermenters
MAC Plate *enteric Pathogens* appear what colors - CORRECT ANSWER - Clear
Colorless colony
Beta Hemolysis definition - CORRECT ANSWER - Complete clearing of blood cells
around or under colonies
Beta Hemolysis species - CORRECT ANSWER - S. Pyogenes, S. agalactiae, Listeria
monocytogenes
Alpha Hemolysis - CORRECT ANSWER - Partial clearing of blood, may have green
discoloration of medium
Categories of Colony Edges - CORRECT ANSWER - Filamentous, Smooth, Rough
Irregular
, Swarming appears as / can be described as - CORRECT ANSWER - Hazy blanket of
growth on surface, extends well beyond streak lines, *Proteus spp.*
Star or Feet Colonies Indicate what type of organism - CORRECT ANSWER - Yeast /
Fungus / Mold
Commercial systems correlate pathogen with what - CORRECT ANSWER - Colony
Characteristic
Time to read 1st reading of the plate - CORRECT ANSWER - 18-24 hours
Plate Reading - CORRECT ANSWER - A comparative reading
Klebsiella and Enterobacter colonies on MAC appear as - CORRECT ANSWER - Large,
mucoid pink colonies, occasional cream color center
Escherichia / Citrobacter colonies on MAC appear as - CORRECT ANSWER - Dry, pink
with pink salt surrounding
SBA Ingredients - CORRECT ANSWER - 5% sheep blood, protein, soybean, NaCl
SBA Report - CORRECT ANSWER - Growth, Hemolytic Pattern, Size, Color
Amount of organism grown on the plate is directly correlated to - CORRECT ANSWER -
Concentration of organism originally present
Bacteria Smells / Orders - CORRECT ANSWER - Pseudomonas aeruginosa - grape / fruit
S. Aureus - old sock
68K UPDATED ACTUAL Exam Questions
and CORRECT Answers
Microbiologists must be able to distinguish between these 2 categories of bacteria to reduce time
and cost of diagnosis - CORRECT ANSWER - "Usual" "Common" Resident Flora
And
Pathogens
MacConkey Agar Distinguishes between - CORRECT ANSWER - Lactose fermenters and
lactose non-fermenters
MAC Plate *enteric Pathogens* appear what colors - CORRECT ANSWER - Clear
Colorless colony
Beta Hemolysis definition - CORRECT ANSWER - Complete clearing of blood cells
around or under colonies
Beta Hemolysis species - CORRECT ANSWER - S. Pyogenes, S. agalactiae, Listeria
monocytogenes
Alpha Hemolysis - CORRECT ANSWER - Partial clearing of blood, may have green
discoloration of medium
Categories of Colony Edges - CORRECT ANSWER - Filamentous, Smooth, Rough
Irregular
, Swarming appears as / can be described as - CORRECT ANSWER - Hazy blanket of
growth on surface, extends well beyond streak lines, *Proteus spp.*
Star or Feet Colonies Indicate what type of organism - CORRECT ANSWER - Yeast /
Fungus / Mold
Commercial systems correlate pathogen with what - CORRECT ANSWER - Colony
Characteristic
Time to read 1st reading of the plate - CORRECT ANSWER - 18-24 hours
Plate Reading - CORRECT ANSWER - A comparative reading
Klebsiella and Enterobacter colonies on MAC appear as - CORRECT ANSWER - Large,
mucoid pink colonies, occasional cream color center
Escherichia / Citrobacter colonies on MAC appear as - CORRECT ANSWER - Dry, pink
with pink salt surrounding
SBA Ingredients - CORRECT ANSWER - 5% sheep blood, protein, soybean, NaCl
SBA Report - CORRECT ANSWER - Growth, Hemolytic Pattern, Size, Color
Amount of organism grown on the plate is directly correlated to - CORRECT ANSWER -
Concentration of organism originally present
Bacteria Smells / Orders - CORRECT ANSWER - Pseudomonas aeruginosa - grape / fruit
S. Aureus - old sock
