## Core Concept
Whipple's disease is a rare, systemic bacterial infection caused by *Tropheryma whipplei*, primarily affecting the small intestine. It leads to malabsorption, weight loss, and diarrhea. The disease is characterized by the presence of PAS-positive macrophages in the intestinal mucosa.

## Why the Correct Answer is Right
To determine which statement is not true regarding Whipple's disease, we need to evaluate each option. However, since the options and the correct answer are not provided in the query, we'll proceed with a general understanding of Whipple's disease. Typically, true statements about Whipple's disease include its causative agent (*Tropheryma whipplei*), its primary site of infection (small intestine), and its characteristic histopathological feature (PAS-positive macrophages). Any statement contradicting these facts or not aligning with established knowledge on Whipple's disease would be considered not true.

## Why Each Wrong Option is Incorrect
Without specific details on options A, B, C, and D, we can infer based on common misconceptions or incorrect statements about Whipple's disease:
- **Option A:** If it suggests a viral etiology, it would be incorrect because Whipple's disease is caused by a bacterium, *Tropheryma whipplei*.
- **Option B:** If it states that the disease primarily affects the large intestine, it would be incorrect because the small intestine is the primary site of infection.
- **Option C:** If it mentions that the disease is characterized by the absence of PAS-positive macrophages, it would be incorrect because the presence of these cells is a hallmark.
- **Option D:** If it inaccurately describes the treatment or epidemiology, it would be incorrect based on established medical knowledge.

## Clinical Pearl / High-Yield Fact
A key point to remember is that Whipple's disease is a systemic infection that requires antibiotic treatment, and its diagnosis is often confirmed by demonstrating PAS-positive macrophages in the intestinal mucosa or by PCR detection of *T. whipplei* in tissue samples.

## Correct Answer Line
Given the lack of specific details for each option, let's assume the correct answer based on a common incorrect statement: **Correct Answer: D.**