background: free-living amoebae (fla) are protozoa that are widely distributed in the environment mainly in water and soil related habitats. thermophilic amoebae are among the most common fla in water bodies, being vermamoeba vermiformis one of the most common species reported worldwide from these sources. interestingly, v. vermiformis has often been reported to survive at high temperatures and...

Histological studies of the brain, lungs, liver, kidneys, heart, and the spleen were carried out in mice previously infected with 6 pathogenic strains of free-living amoebae of the genus Acanthamoeba. The potential virulence of the strains studied was determined on the basis of re-isolation of the amoebae from the organs of the inoculated animals and by the extent of the histopathological chang...

Amoebae Culture Collection at the Institute of Cytology RAS in St. Petersburg (Russia) – ACCIC (SPb) – was founded in 1960; it includes strains (clones) of large free living freshwater amoebae of Amoeba proteus-type (family Amoebidae). These protists have been extensively used as model organisms in cell biology for almost two centuries. The amoebae strains were originally received from a number...

The survey was carried out to investigate the presence of potentially pathogenic free-living amoebae (FLA) during flood in Chiang Mai, Thailand in 2011. From different crisis flood areas, seven water samples were collected and tested for the presence of amoebae using culture and molecular methods. By monoxenic culture, FLA were detected from all samples at 37 °C incubation. The FLA growing at 3...

Free-living amoebae (FLA) are parasites within both humans and animals causing a wide range of symptoms and act as hosts of, and vehicles for phylogenetically diverse microorganisms, called endocytobionts. The interaction of the FLA with sympatric microorganisms leads to an exceptional diversity within FLA. Some of these bacteria, viruses, and even eukaryotes, can live and replicate intracellul...

medicina fluminensis 2016, Vol. 52, No. 1, p. 49-54 49 Abstract. free-living amoebae are present in the nature, feeding mainly with bacteria, fungi, and algae. Some microorganisms have evolved different mechanisms to resist the digestion by amoebae and they are called “amoeba-resistant microorganisms”. Some of the important human bacterial pathogens belong to this category including Cryptococcu...

BACKGROUND Members of the Vannellidae family are free-living amoebae (FLA) distributed mainly in water and soil sources. The present study reports the first isolation of this genus in the biofilm source from hospital environment in Tehran, Iran. METHODS Biofilm samples were collected from hospital environment. Cultivation was performed in non-nutrient agar covered with a heat-killed Escherich...

Enterohemorrhagic Escherichia coli (EHEC) are involved in outbreaks of food-borne illness and transmitted to humans through bovine products or water contaminated by cattle feces. Microbial interaction is one of the strategies used by pathogenic bacteria to survive in the environment. Among protozoa, the free-living amoebae are known to host and protect several water-borne pathogens. In this stu...

Free-living amoebae infecting freshwater and marine fish include those described thus far as agents of fish diseases, associated with other disease conditions and isolated from organs of asymptomatic fish. This survey is based on information from the literature as well as on our own data on strains isolated from freshwater and marine fish. Evidence is provided for diverse fish-infecting amphizo...

Light and transmission electron microscopy observations are reported on the structure and in vitro cytopathic effect of Acanthamoeba griffini trophozoites isolated from a clinical case. Live trophozoites were moderately active with a remarkable pleomorphism which changed from ovoid to quite elongated shapes. When moving, amoebae formed cytoplasmic projections such as wide lamellae and acanthopo...