ガンビアの2つの村でB型肝炎ウイルスの感染が確認された
Lancet (London, England)
|May 28, 1983
まとめ
ガンビアの2つの村では,B型肝炎ウイルス感染症の流行率が著しく変化し,子供の割合は高かった. 家族の伝染,特に兄弟同士の伝染は,B型肝炎ウイルス (HBV) の感染拡大の主な要因でした.
科学分野:
- エピデミオロジー エピデミオロジー
- ウイルス学 ウイルス学 ウイルス学
- 公衆衛生は公衆衛生である.
背景:
- B型肝炎ウイルス (HBV) 感染症は,世界的な健康上の大きな課題となっています.
- 感染伝播のダイナミクスを理解することは,効果的な予防戦略にとって極めて重要です.
研究 の 目的:
- 隣接するガンビアの2つの村で,B型肝炎ウイルス (HBV) 感染の流行と伝播パターンを調査する.
- HBV感染と運搬に関連する危険因子を特定するために.
主な方法:
- ガンビアの2つの村で,横断的な血清発生率研究を行いました.
- B型肝炎表面抗原 (HBsAg) とB型肝炎e型抗原 (HBeAg) の検査について
- 家族集団と伝播パターンの分析.
主要な成果:
- マンドゥアール (2~4歳児の62%),ケネバ (2~4歳児の27%) の間でHBV感染率の顕著な違い.
- HBsAgの高運搬は,マンデューアで5~9歳の子供 (36%) とケネバで2~4歳の子供 (17.6%) でピークに達しています.
- 強い家族集団の証拠があり,兄弟同士の感染が最も顕著である (42%のリスクは,年上の兄弟が陽性である場合).
- 小児のB型肝炎抗原 (HBeAg) 陽性は高かった (5歳未満のHBsAg陽性の小児の86%).
- HBsAgの長期輸送が観察された (1972年から1980年までの63%の持続).
- 成人に診断された原発性肝細胞癌の症例は4例あり,すべてHBsAgキャリアであった.
結論:
- 家族伝染,特に兄弟姉妹からの伝染は,ガンビアのこれらの村で,B型肝炎ウイルス感染症の高い流行に重要な役割を果たしています.
- 幼児期の感染症と持続的な搬送は大きな懸念事項です.
- HBsAgキャリアの間で肝細胞癌の高い割合は,HBV感染の長期的な健康上の影響を強調しています.
関連する概念動画
Bacterial Gastroenteritis
Bacterial gastroenteritis, characterized by diarrhea, abdominal cramps, and vomiting, is often caused by ingestion of contaminated food or water and is frequently associated with pathogenic Escherichia coli strains. These microbes exploit two principal mechanisms to inflict disease.Shiga toxin–producing E. coli, also referred to as STEC—notably O157:H7—release Shiga toxins that target ribosomes, blocking protein synthesis. The B subunit of the toxin binds the host glycolipid receptor...
Yellow Fever
Yellow fever is a viral hemorrhagic disease caused by the yellow fever virus (YFV), a member of the Flaviviridae family. It is transmitted primarily by Aedes and Haemagogus mosquitoes in tropical and subtropical regions of Africa and South America. After transmission through a mosquito bite, the virus initially replicates in skin-resident immune cells such as dendritic cells and macrophages. These cells then migrate to the lymph nodes, where viral replication increases, eventually leading to...
Cytomegalovirus Disease
Cytomegalovirus (CMV) disease is caused by human cytomegalovirus, a double-stranded DNA virus of the Herpesviridae family. While primary CMV infection is often asymptomatic in immunocompetent individuals, the virus can cause severe disease in neonates and immunocompromised patients. CMV is the most common cause of congenital viral infection in the United States, and a major pathogen in solid organ and hematopoietic stem cell transplant recipients.CMV is transmitted via bodily fluids, sexual...
Hepatitis
Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...
Genital Herpes
Genital herpes is a sexually transmitted infection primarily caused by herpes simplex virus type 2 (HSV-2), though herpes simplex virus type 1 (HSV-1) is increasingly implicated in genital infections, particularly among younger populations. Transmission occurs mainly through sexual contact, with asymptomatic viral shedding serving as a major route of spread. This characteristic makes HSV-2 difficult to control at a population level, as individuals may unknowingly transmit the virus even in the...
Viral Hepatitis I: Introduction
Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion of food...


