4.1 Article

Auto brewery syndrome from the perspective of the neurologist

Journal

JOURNAL OF FORENSIC AND LEGAL MEDICINE
Volume 96, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.jflm.2023.102514

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Auto-brewery syndrome (ABS) is a rare condition where the gut microbiota produces intoxicating amounts of alcohol. It has medicolegal implications in terms of malingering and social problems, and can also result in cognitive and behavioral disturbances. The case presented in this study highlights the neurocognitive consequences of ABS and emphasizes its treatability and relatively benign nature.
Background and purpose: Auto-brewery syndrome (ABS) is a rare condition that causes the digestive system to produce intoxicating amounts of alcohol due to abnormal growth of the gut microbiota. Medicolegal inferences of ABS have two distinct edges. First, malingering in drunk-driving and abusing the syndrome as a factitious disorder may occur. Second, patients suffering from the syndrome may face medicolegal and social problems. Moreover, chronic exposure to alcohol due to undiagnosed ABS might result in cognitive and behavioral disturbances. Here, we present a patient with recurrent encephalopathy episodes and chronic cognitive disturbances, who was diagnosed with the auto-brewery syndrome, to emphasize the neurocognitive consequences of the syndrome. Case presentation: A 58 years old female presented with mild cognitive impairment, behavioral disturbances, and recurrent encephalopathy episodes. The history of hemicolectomy, an odd smell on her breath, and cravings for high carbohydrate meals during the paroxysmal episodes raised the suspicion of ABS. Her blood ethanol concentration reached 315 mg/dL following an oral glucose tolerance test (OGTT), and stool analysis revealed increased colonization with C. krusei and C. parapsilosis. She was free of the acute episodes, cognitive and behavioral disturbances improved, and C. krusei and C. parapsilosis were eliminated from the intestinal flora with dietary recommendations and nystatin treatment. Conclusion: The auto brewery syndrome is a rare disorder of dysbiosis leading to a disturbed gut-brain axis. Being a treatable and relatively benign diagnosis, presentation of the ABS with neurocognitive disturbances necessitates highlighting.

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