In the testing of water for coliforms,the presumptive test involves detection of
A) gas production in a lactose broth medium.
B) sheen production on a selective medium.
C) a gram-negative nonspore-forming rod.
D) all of the choices
Correct Answer:
Verified
Q2: Indicator organisms are added to drinking water
Q4: The presence-absence test is a modification of
Q5: Fecal enterococci are increasingly being used as
Q9: Canada geese have become a major source
Q11: Cryptosporidium is an important waterborne disease.This organism
Q13: Coliforms and fecal coliform are often differentiated
Q14: Slow sand filtration effectively removes _.
A)Giardia lamblia
B)Cryptosporidium
Q16: Rapid sand filtration,used in many water purification
Q17: Potable water is unfit for consumption or
Q20: The membrane filter technique can be used
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