All are true regarding Jarisch-Hexiemer’s reaction, except
**Jarisch-Herxheimer Reaction**
**Core Concept**
The Jarisch-Herxheimer reaction is a transient, systemic reaction that occurs in response to the rapid release of endotoxins from spirochetes, such as those found in syphilis, Lyme disease, and yaws, during antibiotic treatment. This reaction is characterized by symptoms such as fever, chills, headache, and myalgias.
**Why the Correct Answer is Right**
The Jarisch-Herxheimer reaction is caused by the release of endotoxins from the spirochetes, which trigger a massive inflammatory response. This response is mediated by the release of cytokines, such as tumor necrosis factor-alpha (TNF-alpha) and interleukin-1 beta (IL-1β), which lead to the symptoms of the reaction. The reaction typically occurs within 24 hours of starting antibiotic treatment and resolves within 24-48 hours.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it is a true statement regarding the Jarisch-Herxheimer reaction. The reaction is indeed more common in patients with secondary syphilis.
* **Option B:** This option is incorrect because it is a true statement regarding the Jarisch-Herxheimer reaction. The reaction is indeed a systemic response to the release of endotoxins from spirochetes.
* **Option C:** This option is incorrect because it is a true statement regarding the Jarisch-Herxheimer reaction. The reaction is indeed characterized by symptoms such as fever, chills, headache, and myalgias.
**Clinical Pearl / High-Yield Fact**
The Jarisch-Herxheimer reaction is a transient, self-limiting reaction that is a normal response to antibiotic treatment for syphilis and other spirochetal infections. It is not a contraindication to treatment and does not affect the efficacy of the antibiotic.
**Correct Answer: A**