Symptoms of metal fume fever resolve spontaneously within: Himachal 10
**Core Concept**
Metal fume fever is an occupational disease caused by inhalation of metal fumes, typically from welding or cutting processes involving zinc, copper, or other metals. The symptoms are similar to those of influenza, including fever, chills, and muscle aches.
**Why the Correct Answer is Right**
The symptoms of metal fume fever are self-limiting and usually resolve within 24-48 hours without treatment. This is because the body's immune response to the metal fumes is temporary, and once the exposure is removed, the symptoms subside. The exact mechanism of metal fume fever is not fully understood, but it is thought to involve an immune response to the metal particles, which leads to the release of inflammatory mediators and the production of fever-inducing cytokines.
**Why Each Wrong Option is Incorrect**
* **Option A:** 72 hours - This is an incorrect estimate, as symptoms usually resolve within 24-48 hours.
* **Option B:** 5 days - This is also an incorrect estimate, as symptoms typically resolve much sooner.
* **Option C:** 1 week - This is an overly long duration, as symptoms usually resolve within 2-3 days.
**Clinical Pearl / High-Yield Fact**
Metal fume fever is often referred to as "Monday morning disease" because it typically occurs on Mondays when workers are exposed to metal fumes after a weekend of not being exposed.
**Correct Answer: A. 24-48 hours**