臨牀消化器内科 Vol.22 No.9(9)


特集名 細菌と消化器疾患 -- 病因,病態とその制御に向けて
題名 膵炎と腸内細菌
発刊年月 2007年 08月
著者 佐藤 晃彦 東北大学大学院消化器病態学分野
著者 下瀬川 徹 東北大学大学院消化器病態学分野
【 要旨 】 急性膵炎の経過中,膵壊死組織や膵周囲壊死部に細菌感染を続発すると,多臓器不全や敗血症などの致死的合併症に進展する危険性が高い.重症急性膵炎において感染症に起因した死亡割合は増加傾向にあり,有効な感染制御の確立が急務となっている.感染は膵壊死を病態背景として経時的に増加し,発症2週間以降に顕在化することが多い.起炎菌としてはグラム陰性桿菌を中心とした腸内細菌が多く,感染成立に腸管からのbacterial translocationの関与が示唆されている.重症例に対する予防的抗菌薬の投与は,感染性膵合併症の発生を低下させ,生命予後を改善する.また,経腸栄養療法にも感染性膵合併症予防効果が期待される.
Theme Digestive Diseases Related to Bacteria -- To Understand Etiology and Control of Clinicopathological Conditions
Title Acute Pancreatitis-Septic Complications
Author Akihiko Satoh Division of Gastroenterology, Tohoku University Graduate School of Medicine
Author Tooru Shimosegawa Division of Gastroenterology, Tohoku University Graduate School of Medicine
[ Summary ] Secondary infection of pancreatic and peripancreatic necrotic tissue is a serious complication with acute pancreatitis, resulting in significant morbidity and mortality. Infection typically presents 2 weeks after the onset of pancreatitis, is heralded by a worsening clinical course, often with sepsis or progression of multi organ failure. Enteric organisms, including Gram-negative rods and anaerobic bacteria, most commonly cause pancreatic infections. In severe acute pancreatitis, the prevalence of enteric organisms in necrotic pancreatic tissue has been linked to bacterial translocation from the gut due to increased intestinal mucosal permeability. Prophylactic treatment with antibiotics may reduce the number of pancreatic infections relation to acute pancreatitis, but this has been associated with the emergence of super-infections by MRSA and Candida specie. Furthermore, gut decontamination and totalenteral nutrition may also reduce pancreatic infection.
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