Investigation of the in vitro cysticidal activity of miltefosine against Acanthamoeba spp.

AbstractThe present study evaluated the in vitro efficacy of miltefosine against cysts ofAcanthamoeba spp. belonging to genotypes T3, T4 and T5. Each genotype was incubated with miltefosine at the concentration of 2.42, 4.84, 9.68, 19.36, 38.72 and 77.44  mM for different periods; 1, 3, 5, 7 d at 37 °C. The viability was assessed by staining with 0.4% trypan blue and culturing on NNA medium at 30 °C for 1 month. The results showed 100% eradication of cyst stage of all concentrations, but exhibited a different degree of activity against differe nt genotypes. The MCC of 38.72 mM could kill genotype T4 and T5 after 1 d of incubation, whereas the killing of T3 needed MCC of 77.44 mM at the same incubation time. Miltefosine showed statistically highly significant difference (P  
Source: Journal of Parasitic Diseases - Category: Parasitology Source Type: research

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by Gretchen Ehrenkaufer, Pengyang Li, Erin E. Stebbins, Monica M. Kangussu-Marcolino, Anjan Debnath, Corin V. White, Matthew S. Moser, Joseph DeRisi, Jolyn Gisselberg, Ellen Yeh, Steven C. Wang, Ana Hervella Company, Ludovica Monti, Conor R. Caffrey, Christopher D. Huston, Bo Wang, Upinder Singh Parasitic infections are a major source of human suffering, mortality, and economic loss, but drug development for these diseases has been stymied by the significant expense involved in bringing a drug though clinical trials and to market. Identification of single compounds active against multiple parasitic pathogens could improve...
Source: PLoS Neglected Tropical Diseases - Category: Tropical Medicine Authors: Source Type: research
Acanthamoeba spp. are ubiquitous pathogens which cause granulomatous amoebic encephalitis and disseminated infection. Moreover, Acanthamoeba spp. infection of the cornea leads to Acanthamoeba keratitis. Our previ...
Source: Parasites and Vectors - Category: Microbiology Authors: Tags: Research Source Type: research
Conclusions: Our results demonstrate that RB-PDAT is effective in decreasing the parasitic load and clinical severity of AK. PMID: 32065854 [PubMed - as supplied by publisher]
Source: Current Eye Research - Category: Opthalmology Authors: Tags: Curr Eye Res Source Type: research
This study aimed to evaluate the safety of these protozoa in air conditioners by taking samples of dust from both the surgical center and the intensive therapy unit. We analyzed 48 dust samples that were collected from six air conditioners equipment located in the Intensive Care Unit (ICU) and Surgical Center (SC) of a public hospital. We found 10.4% of the samples collected in the SC, and 75% of the samples collected in the ICU presented free-living amoeba cysts by light microscopy analysis. In total, 35.4% (17/48) of the air conditioning samples of the hospital were positive and, by PCR, were identified to belong to the ...
Source: Current Microbiology - Category: Microbiology Authors: Tags: Curr Microbiol Source Type: research
This study aimed to determine the effect of benzothiazole on trophozoite and cyst forms of Acanthamoeba castellanii (A.castellanii). Axenic cultures of A. castellanii trophozoites and cysts were prepared to test the amoebicidal activity of benzothiazole. The concentrations of benzothiazole in 24-well plates were prepared as 0.08%, 0.04%, 0.02%, 0.01%, 0.005%, and A. castellanii cysts and trophozoites were added to these cultures. Parasites were counted at 0, ½, 1, 3, 6, 12, 24 and 48 hours in the cell counter after staining with trypan blue. Cytotoxicity of benzothiazole on the WI-38 human fibroblast cell line was a...
Source: Acta Tropica - Category: Infectious Diseases Authors: Tags: Acta Trop Source Type: research
In this study, 10 rhizosphere samples were collected from maize and alfalfa plants in experimental station at Institute of Genetics, Microbiology and Biotechnology, Szent István University. We detected Acanthamoeba based on the quantitative real-time PCR assay and sequence analysis of the 18S rRNA gene. All studied molecular biological methods are suitable for the detection of Acanthamoeba infection in humans. The quantitative real-time PCR-based methods are more sensitive, simple, and easy to perform; moreover, these are opening avenue to detect the effect of number of parasites on human disease. Acanthamoeba speci...
Source: Acta Microbiologica et Immunologica Hungarica - Category: Microbiology Authors: Tags: Acta Microbiol Immunol Hung Source Type: research
Acanthamoeba is well known to produce a blinding keratitis and serious brain infection known as encephalitis. Effective treatment is problematic, and can continue up to a year, and even then, recurrence can ensue...
Source: Parasites and Vectors - Category: Microbiology Authors: Tags: Research Source Type: research
Publication date: Available online 22 October 2019Source: International Journal for Parasitology: Drugs and Drug ResistanceAuthor(s): Monica M. Kangussu-Marcolino, Gretchen M. Ehrenkaufer, Emily Chen, Anjan Debnath, Upinder SinghAbstractThe free-living amebae Naegleria, Acanthamoeba, and Balamuthia cause rare but life-threatening infections. All three parasites can cause meningoencephalitis. Acanthamoeba can also cause chronic keratitis and both Balamuthia and Acanthamoeba can cause skin and systemic infections. There are minimal drug development pipelines for these pathogens despite a lack of available treatment regimens ...
Source: International Journal for Parasitology: Drugs and Drug Resistance - Category: Parasitology Source Type: research
CONCLUSIONS: The scarcity of the studies trying to understand the compatibility as well as the exact mechanisms by which NDDS might be serving to enter the CNS infected by parasites opens new possibilities for further exploratory projects. There is an urgent need for new investments and motivations in the area of nanotechnology applied to the control of parasitic infectious diseases worldwide. PMID: 31612822 [PubMed - as supplied by publisher]
Source: Current Pharmaceutical Design - Category: Drugs & Pharmacology Authors: Tags: Curr Pharm Des Source Type: research
Pathogenic protozoans use extracellular vesicles (EVs) for intercellular communication and host manipulation. Acanthamoeba castellanii is a free-living protozoan that may cause severe keratitis and fatal granulom...
Source: Parasites and Vectors - Category: Microbiology Authors: Tags: Research Source Type: research
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