AI Article Synopsis
- The study investigated free-living amoebae (FLA) and bacteria in air-conditioning cooling towers in southern Brazil, finding that these environments can harbor emerging human pathogens.
- In total, 92% of the water samples collected from 36 cooling systems tested positive for FLA, with Acanthamoeba being the most prevalent type identified.
- Additionally, 39.3% of the amoebae isolates contained intracellular bacteria, all identified as Pseudomonas, highlighting the potential health risks associated with cooling towers.
Article Abstract
This study determined the occurrence of potentially pathogenic free-living amoebae (FLA) and bacteria associated with amoebae in air-conditioning cooling towers in southern Brazil. Water samples were collected from 36 cooling systems from air-conditioning in the state of Rio Grande do Sul, Brazil. The organisms were identified using polymerase chain reaction (PCR) and sequencing automated. The results showed that these aquatic environments, with variable temperature, are potential "hot spots" for emerging human pathogens like free-living amoebae and bacteria associated. In total, 92% of the cooling-tower samples analyzed were positive for FLA, and Acanthamoeba was the dominant genus by culture and PCR. Amoebal isolates revealed intracellular bacteria in 39.3% of them and all were confirmed as members of the genus Pseudomonas. The results obtained show the important role of cooling towers as a source of amoebae-associated pathogens.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s00284-017-1341-8 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of Cinnamaldehyde and Its Nanoemulsion on Acanthamoeba castellanii Cysts and Trophozoites.
Acta Parasitol
January 2025
Department of Food Hygiene, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
Purpose: The current study aimed to investigate the trophocidal and cysticidal activities of cinnamaldehyde (Cinn), a natural compound with known antimicrobial properties, against environmental and reference strains of Acanthamoeba castellanii. Additionally, we explored the potential benefits of Cinn formulated as a nanoemulsion (Cinn-NE) in enhancing its efficacy.
Methods: Cinn-NE was prepared using the ultrasonic emulsification method.
Amoebae: beyond pathogens- exploring their benefits and future potential.
Front Cell Infect Microbiol
January 2025
Department of Biomedical Science and Technology, School of Biological Sciences, Ramakrishna Mission Vivekananda Educational and Research Institute (RKMVERI), Kolkata, India.
Amoebae, fascinatingly diverse protists, showcase a dual nature that positions them as both friends and foes in our world. These organisms, defined by their distinctive pseudopodia, span a spectrum from harmful to helpful. On the darker side, species like pose serious health risks, causing intestinal and liver diseases, while the infamous "brain-eating" leads to fatal primary amoebic meningoencephalitis (PAM), with a daunting 97% mortality rate.
View Article and Find Full Text PDFTranscriptomic profiling of "brain-eating amoeba" infection in mice: the host and the protozoa perspectives.
Front Cell Infect Microbiol
December 2024
Institut Pasteur de la Guadeloupe, Les Abymes, Guadeloupe, France.
The free-living amoeba (NF) causes a rare but lethal parasitic meningoencephalitis (PAM) in humans. Currently, this disease lacks effective treatments and the specific molecular mechanisms that govern NF pathogenesis and host brain response remain unknown. To address some of these issues, we sought to explore naturally existing virulence diversity within environmental NF isolates.
View Article and Find Full Text PDFVertical stratification of the water microbiome in an electric water heater tank: implications for premise plumbing opportunistic pathogens.
J Water Health
December 2024
US Environmental Protection Agency, Office of Research and Development, Cincinnati, OH 45268, USA.
Hot water systems are the most frequent environment associated with the prevalence and growth of opportunistic premise plumbing pathogens (OPPPs). Previous studies identified water heaters as a source of waterborne diseases and concluded that design variables may contribute to their prevalence. A multifaceted approach was used to investigate the vertical stratification of the microbiome and selected OPPPs in an electric water heater tank connected to a home plumbing system simulator.
View Article and Find Full Text PDFAssessment of dynamics of pathogenic environmental T4 and T9 genotypes isolated from three recreational lakes in Klang Valley, Malaysia over the HaCaT cell monolayer.
J Water Health
December 2024
Centre for Medical Laboratory Technology Studies, Faculty of Health Sciences, Universiti Teknologi MARA, Puncak Alam Campus, Selangor, Malaysia; Microbiome Health and Environment (MiHeaRT), Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia E-mail:
Free-living amoebae of the genus are causative agents of keratitis and amoebic encephalitis. They are widely found in various ecological environments. Therefore, the present study brings results that can help to better understand the genotypes of the environmental isolates and their pathogenicity.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!