A female presents with symptoms and signs suggestive of meningitis. MRI reveals a ring enhancing lesion in the frontotemporal region while CSF grows Gram positive bacilli. Other findings are minimally abnormal. Which of the following organisms is the most likely etiological agent -: (A) Listeria monocytogenes, (B) Hemophilus influenza, (C) Pneumococcus, (D) Staphylococcal aureus
Answer is A. None