Ex. 14 Isolation of Antibiotic Producing Bacteria from Soil

Question 1

antibiotics

Answer 1

capable of inhibiting growth of other micro-organism

Question 2

soil micro-organisms with useful antibiotics

Answer 2

Streptomyces, Bacillus, Penicillium, Cephalosporium

Question 3

Streptomyces

Answer 3

filamentous gram +ive called actinomycetes (mold like bacteria)

Question 4

how do streptomyces look

Answer 4

colonies embedded in surface, chalky (granular, powdery or velvety) mass of spores on an aerial secondary mycelium

Question 5

Pseudomonas aeruginosa

Answer 5

fluorescent pseudomanads, gram -ive rod. important opportunistic pathogens. fluoresce under UV

Question 6

Clostridium

Answer 6

spore forming bacteria, causes life threatening conditions. require anaerobic conditions

Question 7

Bacillus

Answer 7

spore forming bacteria, not dangerous pathogens. aerobic conditions

Question 8

How do Bacillus look

Answer 8

irregular shape and spreading, dull wrinkled and range from cream to brown