Module 2: Bacterial Anatomy Flashcards
What are the 3 shapes a bacteria might be?
Cocci, rod/bacilli, spirilla
What are the 5 characteristic arrangements of cocci?
Chains Clusters Pairs/diplococci Tetrads Sarcinae (cubes of 8)
What shape might the ends of a rod/bacilli be?
Rounded, square, pointed
What are coccobacili?
Short oval coccoid rods
Resemble rice grains
What are 3 characteristic arrangements of bacilli?
Palisades (sheets)
Acute angels
Chains
What is an involution form of bacteria?
Strangely shaped bacteria, dead/dying
What might cause involution form bacteria?
Poor growth conditions, lack of nutrients, antibiotic treatment
What is a bacterial colony?
Macroscopic group of bacteria
Divide and grow to visible entity on agar plate
What is cellular morphology?
Microscopic appearance of the bacteria on a gram stain
What is colonial morphology?
Macroscopic appearance of bacterial colonies on plate
Color, consistency, hemolysis, size, edge appearance, etc
What are flagella?
Bacterial appendage that allow movement
What are flagella made of?
Hollow core surrounded by flagellin protein
Attached to bacteria by basal body
What is a bacteria with no flagella called?
Atrichous
What does atrichous mean?
No flagella
What is a bacteria with 1 flagellum called?
Monotrichous
What does monotrichous mean?
1 flagellum
What kind of movement does a monotrichous bacteria have?
Directional
What kind of flagella would a bacteria with directional movement have?
1 flagellum, monotrichous
or
Up to 6 flagella, “tuft”, lophotrichous
What does lophotricous mean?
Lopho = tuft
Up to 6 flagella on one end
What is a bacteria with up to 6 flagella on one end called?
Lophotrichous
What kind of movement would a lophotrichous bacteria have?
Directional
What does amphitrichous mean?
Amphi = both
Flagella on both ends
What is a bacteria with flagella on both ends called?
Amphitrichous
What kind of movement would an aphitrichous bacteria have?
Tumbling, spilling