Gastrointestinal tract and the elderly: functional foods, gut microflora and healthy ageing

Saunier, Katiana; Doré, Joël

doi:10.1016/s1590-8658(02)80158-x

Cited by 62 publications

(37 citation statements)

References 47 publications

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“…Based on this number of isolates, we found that elderly males had a greater diversity of E. coli strains than both young males and females. Increased diversity amongst dominant bacterial species has been observed in healthy elderly subjects (Saunier & Doré, 2002). One possible reason could be changes in the mucosal surfaces in elderly subjects as also suggested by others (Ouwehand et al, 1999).…”

Section: Discussionmentioning

confidence: 68%

Population structure and uropathogenic virulence-associated genes of faecal Escherichia coli from healthy young and elderly adults

Vollmerhausen

Ramos

Gündoğdu

et al. 2011

Journal of Medical Microbiology

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We investigated the population structures of faecal Escherichia coli in 30 healthy young adults (13 males and 17 females) aged between 20 and 45 years and 29 elderly adults (14 females and 15 males) aged between 65 and 77 years. In all, 1566 strains were typed with the PhPlate system and grouped into biochemical phenotypes (BPTs). Strains with shared BPTs were further typed using randomly amplified polymorphic DNA analysis. Forty-four per cent of the strains were shared between two or more age and gender groups. Elders had a significantly higher (P,0.001) number of BPTs (mean±standard error 3.3±0.27) than younger groups (1.82±0.27). Phylogenetic affiliation and virulence-associated genes (VAGs) of the strains showed that more than 80 % of the strains belonging to dominant types belonged to phylogroups B2 and D. Amongst dominant BPTs, phylogenetic group A was significantly associated with females (P,0.0001), and elders were more likely to carry group D (P,0.0124). Elderly males had a higher prevalence of VAGs than young males (P,0.0001) and young females (P,0.0005). We conclude that there is a lower prevalence of E. coli with uropathogenic properties in healthy young adults than in elders.

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Section: Discussionmentioning

confidence: 68%

Population structure and uropathogenic virulence-associated genes of faecal Escherichia coli from healthy young and elderly adults

Vollmerhausen

Ramos

Gündoğdu

et al. 2011

Journal of Medical Microbiology

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“…Knowledge about elderly gut microbiota composition is far from complete (3,13,16,17,27). Changes in gut microbiota composition related to ageing may have implications for the health of elderly persons and may be caused by factors which include psychosocial stress, mobility, and nutrition.…”

mentioning

confidence: 99%

Fecal Microbiota Composition and Frailty

Tongeren

Slaets

Harmsen³

et al. 2005

Appl Environ Microbiol

287

198

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The relationship between fecal microbiota composition and frailty in the elderly was studied. Fecal samples from volunteers with high frailty scores showed a significant reduction in the number of lactobacilli (26-fold). At much higher population levels, both the Bacteroides/Prevotella (threefold) and the Faecalibacterium prausnitzii (fourfold) groups showed a significant reduction in percentage of total number of hybridizable bacteria in the elderly with high frailty scores. In contrast to this, the number of Enterobacteriaceae was significantly higher (sevenfold) in samples from very frail volunteers.

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“…Some studies have indicated a change in intestinal microbiota over time (15,32). Our results suggest that the consumption of soy yogurt fermented with E. faecium CRL 183 and L. helveticus subsp.…”

Section: Species Of Enterococcusmentioning

confidence: 50%

Effect of ingestion of soy yogurt on intestinal parameters of rats fed on a beef-based animal diet

Bedani¹,

Pauly-Silveira²,

Cano³

et al. 2011

Braz. J. Microbiol.

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The aim of this study was to investigate whether the ingestion of soy yogurt fermented with Enterococcus faecium CRL 183 would modify the intestinal count of enterococci, fecal pH and ammonia content in rats fed on a diet containing red meat. The rats were placed in 4 groups: for 60 days, group I was given a standard casein-based rodent feed and groups II-IV, the beef-based feed. From day 30, groups III-IV also received the following products: III) soy yogurt; IV) suspension of E. faecium CRL 183. At the start and on days 30 and 60, feces were collected for the determination of pH, ammonia content, count of enterococci and identification of their species. On day 60, rats were sacrificed and their colons also removed for count of enterococci and identification of their species. Rats that ingested soy yogurt showed no significant change (P<0.05) in fecal counts of Enterococcus spp., but, this rat group showed a higher count of E. faecium than rats that ingested suspension of E. faecium CRL 183. The ingestion of soy yogurt and E. faecium culture caused a significant rise (P < 0.05) in fecal pH and ammonia content. Our results suggest that consumption of soy yogurt fermented with E. faecium CRL 183 and L. helveticus subsp. jugurti could change the species of Enterococcus spp. present in the feces and colon of rats fed on a beef-based diet. However, the fermented soy product and the pure culture of E. faecium CRL 183 also induced undesirable effects such as the increase of fecal pH and ammonia content in the feces of rats fed on a beef-based diet.

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Gastrointestinal tract and the elderly: functional foods, gut microflora and healthy ageing

Cited by 62 publications

References 47 publications

Population structure and uropathogenic virulence-associated genes of faecal Escherichia coli from healthy young and elderly adults

Population structure and uropathogenic virulence-associated genes of faecal Escherichia coli from healthy young and elderly adults

Fecal Microbiota Composition and Frailty

Effect of ingestion of soy yogurt on intestinal parameters of rats fed on a beef-based animal diet

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