Acanthamoeba keratitis cases have emerged in the recent years in Iran. In this case, an amoebic keratitis due to a mixed infection with Acanthamoeba and Vahlkampfia species is reported. Corneal scrapes, contact lenses and contact lens cases obtained from the patient were analysed and were positive for cysts of Acanthamoeba and Vahlkampfia genera. Genus-specific PCR was carried out for both genera, confirming the microscopic observations. To our knowledge, this is the first reported case of a possible mixed amoebic infection due to Acanthamoeba and Vahlkampfia and raises awareness within contact lens wearers in Iran.
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http://dx.doi.org/10.1016/j.exppara.2009.10.009 | DOI Listing |
Acta Parasitol
January 2025
Research Center for Hydatid Disease in Iran, Institute of Infectious Diseases and Tropical Medicine, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran.
Objective: Different Acanthamoeba species are among the most ubiquitous organisms causing serious diseases in humans including central nervous system (CNS) and eye infections. Contact lenses, lens care solutions and the hospital environments particularly the indoor and outdoor environments of ophthalmology wards where people are present with different types of eye diseases, are the potential sources of human infection. The purpose of the present study was the molecular investigation of free-living amoebae in the used contact lenses, lens care solutions and hospital samples from the ophthalmology wards and operating rooms in a referral hospital in southeastern Iran.
View Article and Find Full Text PDFMicroorganisms
November 2024
Laser Eye Microsurgery Centre Clinic of Prof. Jerzy Szaflik, 00-215 Warsaw, Poland.
Background: Diseases in humans caused by amphizoic amoebae that can result in visual impairment and even blindness, have recently been identified more frequently worldwide. Etiologically complex incidents of keratitis, including those connected with strains detected in Poland, were evaluated in this study.
Methods: Corneal samples from cases resistant to antimicrobial therapy assessed for epidemiological, microbiological and parasitological aspects were investigated by phase-contrast microscope, slit lamp and by confocal microscopy.
Int J Parasitol Drugs Drug Resist
January 2025
Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Fudan University, Shanghai, China. Electronic address:
Acanthamoeba castellanii is a widespread unicellular eukaryote found in diverse environments, including tap water, soil, and swimming pools. It is responsible for severe infections, such as Acanthamoeba keratitis and granulomatous amebic encephalitis, particularly in individuals with immunocompromisation. The ability of protozoans to form dormant and persistent cysts complicates treatment, as current therapies are ineffective against cyst stages and suffer from poor specificity and side effects.
View Article and Find Full Text PDFActa Parasitol
January 2025
Department of Molecular Biology and Genetics, Ordu University, Ordu, Turkey.
Genome Biol Evol
January 2025
Centre for Microbiology and Environmental Systems Science, Division of Microbial Ecology, University of Vienna, Vienna 1030, Austria.
The need for high-quality protist genomes has prevented in-depth computational and experimental studies of giant virus-host interactions. In addition, our current knowledge of host range is highly biased due to the few hosts used to isolate novel giant viruses. This study presents 6 high-quality amoeba genomes from known and potential giant virus hosts belonging to 2 distinct eukaryotic clades: Amoebozoa and Discoba.
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