This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Ophthalmology
Macula involvement is common in - 
Select and explain. 
A. Toxoplasma, B. Malaria, C. CMV, D. Syphilis
A: Toxoplasma
Answer: A: Toxoplasma 
Explanation: Decreased visual acuity may occur as a result of macular involvement or severe vitreous inflammation. ... An active toxoplasmic retinochoroiditis is whitish and moderately exudative with ill-defined borders and involves the macula in a majority of patients.