Lab 18: water testing Flashcards
1
Q
Indicator organisms
A
indicates presence of feces
2
Q
Why are coliforms used as an indicator organism if they are not usually pathogenic?
A
Coliforms occur in large numbers in feces to test for fecal contamination
3
Q
Does a positive presumptive test mean that the water is absolutely unsafe to drink? Why or why not?
A
No, because coliforms could be coming from other organisms
4
Q
Name bacterial diseases transmitted by fecal-contaminated water
A
cholera, typhoid fever, travelers diarrhea
5
Q
Name a protozoan disease transmitted by fecal-contaminated water
A
Giardia
