A 3-year old female child sleeping in a thatched hut woke up in the middle of the night screaming. Her mother thought the child had a nightmare and tried to pacify her. After sometime she noticed that the child was sweating profusely and the hands becoming cold, child also vomited a couple of times. The mother immediately rushed the child to the emergency services. His pulse was 150/minute and his BP 90/60 mm Hg. The first line of treatment for this condition is-

**Core Concept**
Tetanus infection is a serious bacterial disease caused by Clostridium tetani, leading to muscle rigidity, spasms, and eventually respiratory failure. The bacterium produces tetanospasmin, a potent neurotoxin that disrupts neurotransmitter release, resulting in muscle stiffness and spasms.

**Why the Correct Answer is Right**
The child's symptoms, such as profuse sweating, cold hands, vomiting, tachycardia (150/minute), and hypotension (90/60 mm Hg), are indicative of tetanus infection. The presence of tetanus toxin in the body leads to muscle rigidity, spasms, and autonomic dysfunction, resulting in the observed symptoms. The first line of treatment for tetanus involves administering tetanus immunoglobulin (TIG) to neutralize the toxin and provide immediate protection.

**Why Each Wrong Option is Incorrect**
**Option A:** Administration of antivenom is not the first line of treatment for tetanus infection. Antivenom is used to treat bites or stings from venomous animals, not bacterial infections like tetanus.
**Option B:** Antibiotics like metronidazole or penicillin are used to treat the underlying bacterial infection, but they do not neutralize the toxin and are not the first line of treatment.
**Option C:** Activated charcoal is used to treat poisoning, not tetanus infection.

**Clinical Pearl / High-Yield Fact**
Tetanus infection is characterized by the presence of a "lockjaw" or trismus, where the child has difficulty opening their mouth or swallowing. This is due to the tetanus toxin's effect on the cranial nerves, leading to muscle rigidity and spasms.

**Correct Answer: C. Activated charcoal is used to treat poisoning, not tetanus infection.

✓ Correct Answer: B. Prazosin