Final answer:
The treatment for Giardia duodenalis involves antibiotics such as Flagyl, with oral rehydration therapy for managing diarrhea. Proper diagnosis through fecal examination is essential, and preventive measures include drinking filtered water to avoid contaminated sources.
Step-by-step explanation:
The best way to treat Giardia duodenalis, also known as Giardia lamblia or Giardia intestinalis, typically involves prescribed antibiotics such as Flagyl (metronidazole). While there is no vaccine available for preventing giardiasis, adequate treatment is crucial once diagnosed through a stool test.
Giardia infection can be contracted through contaminated food or water and person-to-person transmission. Symptoms include diarrhea, which can be treated with oral rehydration therapy and sometimes medications. Anti-parasitic drugs, notably metronidazole, tinidazole, or nitazoxanide, are effective in clearing the infection.
Preventive measures include proper water treatment as Giardia cysts can survive chlorination and need filtering out. In case of severe symptoms or dehydration, intravenous fluids may be necessary, especially in bouts of gastroenteritis.