インドのカラアザールは,リーシュマニア・トロピカ (Leishmania tropica) によって引き起こされる
D L Sacks1, R T Kenney, R D Kreutzer
1Laboratory of Parasitic Diseases, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA.
Lancet (London, England)
|April 15, 1995
まとめ
リーシュマニア・ドノヴァニだけでなく,リーシュマニア・トロピカがインドで内臓リーシュマニア症を引き起こす. この発見は,ナトリウムアンチモニウムグルコナートを受けているKala-azar患者の治療失敗を説明する可能性がある.
科学分野:
- 寄生虫学とは,寄生虫学である.
- トロピカル・メディシン (熱帯医学)
- 感染症 感染症は感染症です.
背景:
- インドのカラアザル (内臓リーシュマニア症) は,通常,リーシュマニアドノヴァニに起因する.
- 病原性のリーシュマニア種を理解することは,効果的な診断と治療に不可欠です.
研究 の 目的:
- インドにおける内臓のリーシュマニア症の原因となる寄生虫であるリーシュマニアの種を調査する.
- インドの内臓リーシュマニア症の症例にリーシュマニア・トロピカが関与するかどうかを判断する.
主な方法:
- インドの内臓リーシュマニア症患者の15人のリーシュマニア寄生虫単離物の分析.
- タイプ化方法には,モノクローナル抗体,イソ酵素分析,kDNA分析が含まれていました.
主要な成果:
- 15種のうち4種が,リーシュマニア・トロピカ (Leishmania tropica) と特定された.
- リーシュマニア・トロピカは歴史的に皮膚性リーシュマニア症と関連しているが,内臓病では観察されている.
結論:
- リーシュマニア・トロピカ (Leishmania tropica) は,インドにおける内臓リーシュマニア症の共同流行病である.
- Leishmania tropicaの存在は,ナトリウムアンチモニウムグルコナートに対する治療反応の減少に寄与する可能性があります.
関連する概念動画
01:26Rocky Mountain Spotted Fever
Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
01:30Leishmaniasis
Leishmaniasis is a protozoal disease caused by species of the genus Leishmania and transmitted through the bite of infected female sandflies. The parasite exists in two principal morphological forms during its life cycle. A sandfly acquires intracellular amastigotes from an infected reservoir host, such as a dog. Within the sandfly, these forms differentiate into motile, flagellated promastigotes. During a subsequent blood meal, promastigotes are injected into the human host, where they...
01:29Malaria
Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...
01:28Toxoplasmosis
Toxoplasmosis, a zoonotic disease caused by the protozoan Toxoplasma gondii, poses significant public health challenges globally due to its high seroprevalence and varied clinical manifestations. As an obligate intracellular parasite, T. gondii can infect all warm-blooded vertebrates, but felids are its only definitive hosts, shedding unsporulated oocysts into the environment. Humans typically acquire the infection through ingestion of tissue cysts in undercooked meat or oocysts from...
01:22American Trypanosomiasis
Chagas disease, or American trypanosomiasis, is a vector-borne parasitic infection caused by Trypanosoma cruzi, a flagellated protozoan (kinetoplastid) of the family Trypanosomatidae. The disease is endemic in Latin America, although cases are increasingly reported worldwide due to human migration. Transmission most commonly occurs when feces of infected triatomine bugs contaminate bite wounds or mucosal surfaces; additional routes include congenital, transfusional, transplant-related, and oral...
01:21Antiprotozoal Agents
Leishmaniasis is a widespread parasitic disease caused by several Leishmania species. It affects millions of people each year and remains a major public health problem in endemic regions. First-line treatment relies on pentavalent antimonials, including meglumine antimoniate and sodium stibogluconate. Even so, how these drugs work has not been fully clear, especially their interaction with parasite-specific biochemical pathways. One key target is trypanothione reductase (TR), an enzyme that...