**Core Concept**
Typhoid fever, caused by Salmonella Typhi, is a systemic infection that can lead to various complications if left untreated or inadequately managed. Surgical complications of typhoid fever are a significant concern, particularly in cases where intestinal perforation or hemorrhage occurs.

**Why the Correct Answer is Right**
Intestinal perforation is a well-known surgical complication of typhoid fever, often due to the progression of the disease causing inflammation and necrosis of the intestinal wall. This can lead to peritonitis, an infection of the abdominal cavity, which requires immediate surgical intervention. The perforation can occur in any part of the gastrointestinal tract, but it most commonly affects the ileum. The pathophysiology involves the invasion of Salmonella Typhi into the intestinal mucosa, leading to inflammation and tissue damage.

**Why Each Wrong Option is Incorrect**
**Option A:** Intestinal obstruction is not typically considered a direct surgical complication of typhoid fever, although it may occur as a result of intestinal adhesions or fibrosis following a previous surgical intervention.
**Option B:** Cholecystitis is not a typical surgical complication of typhoid fever, as the infection primarily affects the gastrointestinal tract rather than the biliary system.
**Option C:** Intestinal hemorrhage can occur as a complication of typhoid fever, particularly if there is erosion of the blood vessels in the intestinal wall. This can be a life-threatening condition that requires prompt surgical intervention.

**Clinical Pearl / High-Yield Fact**
It's essential for clinicians to recognize the signs and symptoms of intestinal perforation, such as abdominal pain, tenderness, and guarding, to promptly initiate surgical management and prevent further complications.

**Correct Answer: D. Cholecystitis.**