{'fraction_non_alphanumeric': 0.023045267489711935, 'fraction_numerical': 0.011522633744855968, 'mean_word_length': 5.110552763819095, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Brainstem encephalitis with serological evidence of St Louis encephalitis.

Brainstem encephalitis with serological evidence of St Louis encephalitis SIR,-St Louis encephalitis is caused by an arbovirus that is transmitted to man by the mosquito.' This form of encephalitis usually presents in endemic areas in the summer and early autumn months with typical clinical manifestations of fever, headache, change in sensorium and tremor.2 We report here a patient with serological evidence of St Louis encephalitis infection who presented with brainstem signs and symptomatology as the major manifestations of her illness. A 49-year-old black female school janitor from southern Louisiana had the onset of fever, low back pain and myalgia in September, 1976. She was evaluated by a local physician and treated with ampicillin with a presumptive diagnosis of a urinary tract infection. Two days later she was admitted to a local hospital because of headache, fever, vertigo and unsteadiness of gait. Physical examination was said to be normal except for fever(38°). Skull and chest X-rays, routine electrolytes and CBC were normal. The spinal fluid contained 20 polymorphonuclear leukocytes/mmt, protein of 0 37 g/l and