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Showing 1 to 20 of 71 for “"opportunistic pathogens"”.
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Host defense mechanisms against opportunistic pathogens
Contains fulltext : 251474.pdf (Publisher’s version ) (Open Access)
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Studies of Three Human Intestinal Opportunistic Pathogens
Opportunistic bacterial pathogens are present in the intestines of all mammals. These bacteria are symbionts to a certain extent, but under certain conditions these organisms can be deadly. Intestinal opportunistic pathogens encompass many genera and include organisms such as those in the …
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Critical factors controlling regrowth of opportunistic pathogens in premise plumbing
Opportunistic pathogens (e.g., Legionella pneumophila, Mycobacterium avium complex, Acanthamoeba polyphaga, Pseudomonas aeruginosa) residing in human-made water systems, particularly premise plumbing, are now the primary source of water-borne disease in developed countries. The prevention and …
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Characterization of opportunistic Pathogens in Drinking Water Supplied by Private Wells
… wells are understudied potential sources of opportunistic pathogen (OP) infections. OPs, including Legionella and Mycobacterium, are of particular concern for immunocompromised individuals and are known to proliferate in drinking water systems. Much of our knowledge surrounding OP occurrence …
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Relationship Between Organic Carbon and Opportunistic Pathogens in Simulated Premise Plumbing Systems
Consumer exposure to opportunistic pathogens in potable water systems poses a significant challenge to public health as manifested by numerous cases of pneumonia, non-tuberculosis lung disease, and keratitis eye infections. Water utilities have extensive understanding in control of heterotrophic …
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Growth of Opportunistic Pathogens in Domestic Plumbing: Building Standards, System Operation, and Design
… public health threats resulting from exposure to opportunistic pathogens (OPs) in domestic water (i.e., hot/cold water for human use) will be one of the grand challenges for water safety in the 21st century. This dissertation anticipates some of the complexities in balancing stakeholder goals and …
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Towards Optimization of Residual Disinfectant Application for Mutual Control of Opportunistic Pathogens and Antibiotic Resistance in In-Building Plumbing
Opportunistic premise (i.e., building) plumbing pathogens (OPPPs) and antibiotic resistant bacteria are emerging microbial concerns in drinking water. OPPPs, such as Legionella pneumophila, are the leading cause of drinking water disease in many developed countries. Contributing factors include the …
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Opportunistic Pathogens and the Brain-eating Amoeba, Naegleria fowleri in Reclaimed Water, Municipal Drinking Water, and Private Well Water
Opportunistic pathogens (OPs) are of special concern for immunocompromised populations and are known to grow in both drinking water and reclaimed water (i.e., non-potable recycled water) distribution systems, with aerosol inhalation and other non-ingestion exposures that are not addressed by …
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Occurrence and Control of Microbial Contaminants of Emerging Concern through the Urban Water Cycle: Molecular Profiling of Opportunistic Pathogens and Antibiotic Resistance
… dissertation, two important subsets of MCECs, opportunistic pathogens (OP) and antibiotic resistant genes (ARG), are studied across several compartments of the urban water cycle, including surface water, stormwater, wastewater, recycled water, and potable water. Collectively, this dissertation …
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A Framework for Controlling Opportunistic Pathogens in Premise Plumbing Considerate of Disinfectant Concentration x Time (CT) and Shifts in Microbial Growth Phase
Opportunistic pathogens (OPs) can naturally colonize premise (i.e., building) plumbing and are the leading cause of disease associated with potable water in the U.S. and many other countries. While secondary disinfectant is added by utilities prior to water distribution through pipes, the residual …
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Impact of Premise Plumbing Conditions, Materials, Corrosion Control, Temperature, and Water Heater System Design on the Growth of Opportunistic Pathogens in Drinking Water
… (premise) plumbing to enhance or diminish opportunistic pathogen growth, including Legionella. It then holistically examines the problem at the field, bench and pilot scale by first discovering problems with lead and Legionella in Flint, MI, during an event popularly referred to as the …
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Dynamics of the human gut microbiota in very early life
… strains, and high-level colonisation by opportunistic pathogens associated with the hospital healthcare environments (including Enterococcus, Enterobacter and Klebsiella species), in babies delivered by caesarean section. Furthermore, I validated culture-independent detection of pathogen …
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Mucins regulate virulence and colonization factors in Streptococcus pneumoniae
… with microbial dysbiosis, where the outgrowth of opportunistic pathogens threatens human health. Streptococcus pneumoniae is a ubiquitous opportunistic pathogen, able to both asymptomatically colonize the microbiota of healthy children and adults and to cause invasive diseases. The mechanisms by …
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Investigation of the prevalence of opportunistic gram negative pathogens in the water supply of a haematology unit, and the application of point-of-use filtration as an intervention.
… water systems are reservoirs of nosocomial pathogens. This study investigated longitudinal recovery of the opportunistic pathogens Pseudomonas aeruginosa, Stenotrophomonas maltophilia and Acinetobacter baumannii from water outlets of a haematology unit and evaluated Point-Of-Use Filtration …
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Effects of installing point-of-use filters intended for lead removal on drinking water quality
… are favorable environments for biofilm-forming opportunistic pathogens. To comply with state law requiring no more than 5 parts per billion (ppb) of lead in school drinking water, school administrators installed point-of-use (POU) filters made of activated carbon and ion exchange media in …
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Examining the gut microbiota in aging
… A nonsignificant increased proportion of opportunistic pathogens is apparent in DMP, suggestive of gut dysbiosis in T2D. Further, lower CRF and higher body fat [observed in DMP] were linked to decreased gut microbial diversity and increased opportunistic pathogens. Fasted appetite hormones …
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Impacts of mucins on microbial physiology and interactions
… inhabiting the body, some of which are opportunistic pathogens, most people harbor these organisms without showing any signs of disease. The mucus that covers the wet epithelium and houses the microbiota is a prime candidate for offering protection from pathogens, yet its specific role …
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Neutrophil Responses to Mixed-Species Anaerobic Biofilms
… mixed-species anaerobic biofilms composed of two opportunistic pathogens, Fusobacterium necrophorum and Porphyromonas levii and measure neutrophil responses. Neutrophils are a vital component of the innate immune system and the results show that neutrophils exposed to mixed-species planktonic …
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Interactions between the Bacteroides conjugative transposons and the plasmids and insertion elements (NBUs) they mobilize
… spp. are clinically important because they are opportunistic pathogens. At present, most clinical isolates of Bacteroides are resistant to tetracycline and many have acquired resistance to other antibiotics, such as erythromycin and cefoxitin. A family of chromosomally located conjugative …
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