Giardiasis: The Daily PANCE Blueprint
A 7-year-old girl presents with foul-smelling, greasy diarrhea, bloating, and cramping after returning from a camping trip where she drank water from a stream. She is afebrile and well-hydrated. Physical exam reveals mild periumbilical tenderness. Stool antigen testing is pending. What is the most appropriate next step in management?
A. Metronidazole
B. Albendazole
C. Tinidazole
D. Ciprofloxacin
E. Trimethoprim-sulfamethoxazole
Answer and topic summary
The answer is C. Tinidazole
This child presents with classic features of giardiasis, a protozoan infection commonly acquired from ingestion of untreated water. Symptoms include greasy, malodorous diarrhea, bloating, and abdominal cramps. In patients ≥3 years old, tinidazole is the preferred first-line treatment due to its single-dose regimen, superior efficacy (>90%), and fewer side effects compared to metronidazole. Empiric treatment is appropriate while awaiting stool test results in symptomatic individuals with high suspicion. Supportive care (e.g., fluids and electrolytes) is also essential.
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Smarty PANCE Content Blueprint Review:
Covered under ⇒ PANCE Blueprint Infectious Disease ⇒ ⇒
