肝膿瘍における芽胞胞子虫:まれな腸管外の部位
Daniel Rodríguez-Zúñiga1, Belén Rivaya2, María Vanessa López-Peláez3
1Microbiology Department, Jove Hospital Foundation, Asturias, Gijón, Spain.
Case reports in infectious diseases
|February 23, 2026
まとめ
一般的な腸内細菌である芽胞胞子虫が肝膿瘍で発見され、腸管外への拡散の可能性が示唆されました。この症例は、芽胞胞子虫が腸管外感染における日和見病原体となる可能性を強調しています。
科学分野:
- 微生物学
- 感染症
- 消化器病学
背景:
- 芽胞胞子虫は、病原性が議論されている一般的な腸内嫌気性原生生物です。
- 芽胞胞子虫の腸管外への拡散はまれに報告されており、そのメカニズムは不明確です。
研究 の 目的:
- 芽胞胞子虫が腸管外感染を引き起こす可能性を調査すること。
- ペルー人女性の肝膿瘍の原因物質を同定すること。
主な方法:
- 質量分析法、PCR、サンガーシーケンシング、培養ベースの方法が使用されました。
- サンプルには、血液、組織(肝膿瘍)、および糞便が含まれていました。
- 従来の技術と分子技術により、好気性菌および嫌気性菌、ならびに芽胞胞子虫が同定されました。
主要な成果:
- 肝膿瘍液から芽胞胞子虫サブタイプST1が同定され、invitroで培養されました。
- 大腸菌、コリネバクテリウム属、フラジリス菌などの腸内細菌叢関連細菌も検出されました。
- これらの所見は、腸内細菌叢の門脈循環への転位が感染を引き起こしたことを示唆しています。
結論:
- 芽胞胞子虫は腸管から転位し、日和見病原体として作用する可能性があります。
- この症例は、芽胞胞子虫ST1が腸管外感染(肝膿瘍)を引き起こすことを示しています。
- 腸内細菌叢の転位は、そのような侵襲性感染の妥当なメカニズムです。
関連する概念動画
Diseases of the Liver and Gallbladder
2.1K
Liver and gallbladder diseases are a significant health concern, with prominent conditions including cirrhosis, hepatitis, non-alcoholic fatty liver disease (NAFLD), and gallstones. Jaundice is a common manifestation of liver and biliary disease.
Cirrhosis is characterized by the scarring of hepatic lobules in the liver, which are replaced by fibrous tissue, affecting the liver's normal functioning. NAFLD, on the other hand, is caused by an excessive build-up of fat in the liver, not...
Cirrhosis is characterized by the scarring of hepatic lobules in the liver, which are replaced by fibrous tissue, affecting the liver's normal functioning. NAFLD, on the other hand, is caused by an excessive build-up of fat in the liver, not...
2.1K
Diversity of Protists I
1.5K
Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
1.5K
Chronic Bowel Disorders: Introduction
839
Chronic bowel diseases are a group of long-term conditions affecting the digestive tract, characterized by inflammation and damage to the gut lining. These conditions primarily include irritable bowel syndrome and inflammatory bowel disease.
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
839
Inflammatory Bowel Disease I: Ulcerative Colitis
1.2K
Introduction
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...
1.2K

