Question

giardia infection is an intestinal infection that causes cramps, nausea, and diarrhea. it is caused by a parasite and is one of the most common waterborne infectious diseases in the united states.
tia knows that giardia is a pathogen found in fecal matter. the parasite is often found in streams, swimming pools, spas, and municipal water supplies. to help her community prevent the spread of giardia in the future, tia wants to suggest a preventive measure to public officials in her community.
what preventive measure should tia share with public officials in her community that effectively targets her goal to prevent the spread of giardia?

• research how giardia infects the human body.
• monitor trends in the growth of giardia populations.
• identify the symptoms associated with this infection.
• enact measures to test city pools more frequently.

Explanation:

To prevent the spread of giardia, we need a measure that directly targets reducing its presence in common environments. Giardia is found in water - related places like pools. Researching infection mechanisms (first option) or monitoring growth (second option) or identifying symptoms (third option) don't directly prevent spread. Testing city pools more frequently (fourth option) can detect giardia in pools and allow for actions to reduce its spread, so this is the correct preventive measure.

Answer:

D. Enact measures to test city pools more frequently.