**Core Concept**
Gas gangrene is a type of necrotizing fasciitis caused by Clostridium perfringens (formerly known as Clostridium welchii), a gram-positive, anaerobic, spore-forming bacterium. This condition is characterized by rapid progression of infection, tissue necrosis, and gas production, leading to severe morbidity and mortality.

**Why the Correct Answer is Right**
The best way to prevent gas gangrene is through prompt and adequate wound care, debridement, and antibiotic prophylaxis, especially in patients with traumatic injuries or surgical wounds. This is because C. perfringens thrives in anaerobic environments, and controlling the wound environment can limit its growth. Additionally, early administration of antibiotics such as penicillin or clindamycin can help prevent the spread of infection.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while tetanus toxoid vaccination can prevent tetanus infection, it does not directly prevent gas gangrene caused by C. perfringens.
**Option B:** This option is incorrect because while proper wound closure and suturing can prevent infection, it does not address the anaerobic environment that C. perfringens requires to thrive.
**Option C:** This option is incorrect because while antiseptics can reduce bacterial load, they do not prevent the growth of anaerobic bacteria like C. perfringens.

**Clinical Pearl / High-Yield Fact**
It is essential to note that gas gangrene can occur even in the absence of significant trauma, and a high index of suspicion is necessary for early diagnosis and treatment.

**Correct Answer:** D. Prompt and adequate wound care, debridement, and antibiotic prophylaxis