| 21. | Pathogens less often isolated from people include Neisseria meningitidis, Pseudomonas aeruginosa and Giardia lamblia.
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| 22. | "I've had giardia myself and it's no fun,"
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| 23. | Routine chlorination does not kill giardia.
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| 24. | Stool examinations often reveal Giardia lamblia.
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| 25. | Although Giardia is not a prokaryote, it could use similar mechanisms if it lacks mitochondria.
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| 26. | A filter with a bit of iodine kills the giardia parasite, a particular problem in Petersburg.
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| 27. | As common and unmistakable as the giardia parasite is, it is nonetheless often difficult to diagnose.
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| 28. | Fifty percent of the facilities detecting Giardia found levels above the amount thought necessary to cause infection.
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| 29. | Angry residents were demanding to know how the parasites cryptosporidium and giardia spread through the water system.
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| 30. | Giardia, normally spread through human or animal feces, can cause diarrhea and other gastrointestinal problems.
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