what is the most common couse of meningitis beyond neonatal? strep pneumoniae. 2.what is the most common couse in adult?neisseria 3.what isthe couse inthose with immune systemdefect? listeria monocytogen 4.what is the couse in those who have surjury ? staf aureus what is most common on HIV person t cell<100?cryptococcus . 5. what is the presentation of themeningities? fever photophobia ,headache nuchal rigidity ,nausea vomiting . altered mental status ,seasure,focal neurologic deficite. what is the most common neurologic deficit ? visual field and cranial nerve deficite . .