The many causes of XXXX .

@entity1 @entity791 @entity883 @entity706 @entity784 @entity693 @entity134 @entity1800 @entity978 @entity1778 @entity1906 @entity3147 @entity1065 @entity2040 @entity10 @entity378 @entity221 @entity288
@entity693 should be suspected in a @entity1 who presents with @entity221 , @entity693 , or severe @entity10 . A careful physical examination should be performed of perimeningeal foci, with emphasis on the sinuses, ears, throat, neck, and lungs. A history of exposure to @entity378 , @entity1800 , rodents, or suspicious dairy products or farm animals may give clues to the source of the @entity693 . Immunosuppression through the use of @entity288 or chemotherapy for such conditions as @entity978 , @entity706 , @entity1778 , @entity3147 , or @entity791 ( @entity791 ) should also be noted and alert the clinician to the possible presence of an unusual pathogen. @entity693 associated with @entity1778 or most of the @entity784 is likely to be from a common bacterial agent (often Listeria), unless the @entity1 is being treated with a @entity134 or is receiving other chemotherapy. @entity1 with @entity978 or @entity791 or who have been treated with a @entity134 are more likely to have cryptococcal or @entity1906 . Neonates and the very elderly may present with only irritability or lethargy and @entity221 , without any of the other common symptoms. In neonates up to one week of age, group B @entity883 should be suspected. Gram-negative organisms should be suspected in elderly @entity1 and those who have had neurosurgery. In @entity1 with CSF shunts, infection with coagulase-negative Staphylococcus should be assumed and these @entity1 are treated empirically until results of cultures are received. Several noninfectious conditions may mimic @entity693 , as may some unusual causes of @entity693 (eg, @entity1065 and @entity2040 ), which have not been discussed in this article.
