Final answer:
The treatment for gastroenteritis caused by Giardia (Gardia) involves rehydration therapy and medication. Rehydration therapy helps replace lost fluids, and medication specifically targets and eliminates the Giardia parasite.
Step-by-step explanation:
The treatment for gastroenteritis caused by the protozoan Giardia (Gardia) is usually a combination of rehydration therapy and medication.
Rehydration therapy involves increasing fluid intake to replace fluids lost through diarrhea and vomiting. This can be done by consuming oral rehydration solutions, which are a combination of water, salts, and sugar, or by receiving intravenous fluids in severe cases.
Medication is used to specifically target and eliminate the protozoan Giardia. The most common drug prescribed for giardiasis is metronidazole (Flagyl), which is effective in killing the parasite.