Which of the following agents is likely to cause cerebral calcification and hydrocephalus in a newborn whose mother has history of taking spiramycin but was not complaint with therapy
**Core Concept**
Toxoplasmosis is a parasitic infection caused by the protozoan Toxoplasma gondii. In pregnant women, untreated or inadequately treated toxoplasmosis can lead to congenital toxoplasmosis in the newborn, resulting in serious health complications.
**Why the Correct Answer is Right**
The correct answer is related to the transmission of toxoplasmosis from the mother to the fetus. Spiramycin is an antibiotic used to treat toxoplasmosis in pregnant women, but it is not effective in eradicating the parasite from the fetus. If the mother is not compliant with therapy, the parasite can still be transmitted to the fetus, leading to congenital toxoplasmosis. Cerebral calcification and hydrocephalus are common complications of congenital toxoplasmosis, resulting from the parasite's invasion of the brain tissue and the subsequent inflammatory response.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because spiramycin is the treatment for toxoplasmosis in pregnant women, but it is not the cause of cerebral calcification and hydrocephalus.
* **Option B:** This option is incorrect because the question specifies that the mother was not compliant with spiramycin therapy, which is the key factor leading to congenital toxoplasmosis.
* **Option D:** This option is incorrect because toxoplasmosis is the underlying cause of cerebral calcification and hydrocephalus in this scenario, not the treatment.
**Clinical Pearl / High-Yield Fact**
It is essential to note that spiramycin is not effective in eradicating Toxoplasma gondii from the fetus, and therefore, compliance with therapy is crucial to prevent congenital toxoplasmosis.
**Correct Answer:** B.