Published November 2, 2006
by Lulu.com .
Written in English
|The Physical Object|
|Number of Pages||104|
This book covers various aspects of the interplay between commensal and pathogenic bacteria with their hosts. The chapters summarize recent findings on the geno- and phenotypic traits of opportunistic bacterial pathogens, such as Escherichia coli, staphylococci or Pseudomonas aeruginosa, as well as the impact of commensal and probiotic. This study suggests that certain isolates of Blastocystis exert their pathogenic effects through disruption of the gut microbiota and provides a counterpoint to the increasing reports indicating the commensal nature of this ubiquitous parasite. Keywords: Blastocystis, Subtypes, Gut microbiota, Dysbiosis, Bifidobacterium Background. Blastocystis is a unicellular protist present throughout the world in the intestines of both healthy and symptomatic humans and animals .Its pathogenic potential is still controversial [2–5].For many years, it has been suggested that Blastocystis is a commensal organism living in the human intestine. Originally, the parasite was considered to be a harmless yeast until the s, when Cited by: Blastocystis is a common gut eukaryote detected in humans and animals. It has been associated with gastrointestinal disease in the past although recent metagenomic studies also suggest that it is a member of normal microbiota. This study investigates interactions between pathogenic human isolates belonging to Blastocystis subtype 7 (ST7) and bacterial representatives of the gut microbiota.
The actual pathogenic role of B hominis, however, has been a subject of much controversy. There are some published data to suggest a pathogenic role for B hominis in certain animals. In a murine model, Moe et al infected immunocompetent mice with fecal cysts of B hominis. 1 Infection was self-limited, but some mice showed weight loss and lethargy. 14 hours ago Escherichia coli are facultative, anaerobic Gram-negative rods with many facets. Within resistant bacterial populations, they play an important ecological role and can be used as a bioindicator of antimicrobial resistance. All animal species used for food production, as well as humans, carry E. coli in their intestinal tracts; plus, the genetic flexibility and adaptability of this bacteria to. Blastocystis hominis is an enteric parasite that can inhabit the gastrointestinal tract of humans, as well as many animals. There is some controversy over whether this parasite is commensal, and thus isn't harmful, or if it is pathogenic. The more recent research seems to point towards Blastocystis hominis as being a pathogenic parasite that should be eradicated. Total Commensal Abundance The total commensal abundance is a sum-total of the reported commensal bacteria compared to a healthy cohort. Results are denoted with circle and reported as a percent variance from healthy cohort levels. Low levels of commensal bacteria are often observed after antimicrobial therapy, or in diets lacking fiber and/.
Blastocystis hominis. Blastocystis hominis is a common stool commensal (up to 19% of normal controls in the United States are colonized). There is evidence that heavy infestations may be associated with cramps, vomiting, dehydration, abdominal pain, sleeplessness, nausea, weight loss, lassitude, dizziness, flatus, anorexia, pruritus, and tenesmus. The stages of Blastocystis have been known for years. However, many facts are still disputed, e.g. even the question whether it is a true pathogen or a commensal present in sometimes life-threatening diarrheas. The present book evaluates in chapters contributed by . Blastocystis hominis est un organisme intestinal fréquent et cosmopolite, considéré auparavant comme une levure saprophyte et classé actuellement comme parasite. La contamination s’effectue par voie orale. L’association de B. hominis et de troubles digestifs (diarrhée, douleurs abdominales, flatulence) a été rapportée par divers auteurs mais contestée par d’autres. Blastocystis: Pathogen or Passenger?: An Evaluation of Years of Research - Ebook written by Heinz Mehlhorn, Kevin S. W. Tan, Hisao Yoshikawa. Read this book using Google Play Books app on your PC, android, iOS devices. Download for offline reading, highlight, bookmark or take notes while you read Blastocystis: Pathogen or Passenger?: An Evaluation of Years of Research.