• Title/Summary/Keyword: human feces

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Use of IMS-RT-PCR for the Rapid Isolation and Detection of Hepatitis A Virus from the Swine Feces (IMS-RT-PCR을 활용한 육성돈 분변으로부터 간염 A형 바이러스의 신속순수분리 및 검출법 연구)

  • Lee, Hee-Min;Kim, Duwoon
    • Korean Journal of Food Science and Technology
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    • v.44 no.5
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    • pp.638-642
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    • 2012
  • Human pathogenic viruses such as hepatitis A and E virus (HAV and HEV), which lead to acute liver failure and death, are foodborne pathogens associated with the consumption of virus-contaminated meats, filter-feeding bivalves, fruits, and salads. Two of the three swine farms examined in this study had HAV and HEV positive stool samples in a nested RT-PCR assay. The use of the immunomagnetic separation (IMS) facilitated the separation of HAV through interactions between the ligand on the virion surface and the antibody from the swine feces containing both HAV and HEV. The nested RT-PCR analysis was performed for the detection of HAV obtained from hepatocarcinoma cell line (PLC/PRF/5) contaminated with eluent fraction of IMS. This indicated that IMS has the potential to simultaneously isolate and concentrate target viruses by changing antibodies linked on the magnetic beads.

PCR Detection and Molecular Characterization of Pentatrichomonas hominis from Feces of Dogs with Diarrhea in the Republic of Korea

  • Kim, Yun-Ah;Kim, Hye-Youn;Cho, Shin-Hyeong;Cheun, Hyeong-Il;Yu, Jae-Ran;Lee, Sang-Eun
    • Parasites, Hosts and Diseases
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    • v.48 no.1
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    • pp.9-13
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    • 2010
  • Pentatrichomonas hominis is considered a commensal protozoan in the large intestine of a number of mammalian hosts, such as cats, dogs, and non-human primates. The resulting infections, which can induce diarrhea, have been attributed to opportunistic overgrowth of P. hominis. This study was performed to confirm the P. hominis infection and its molecular characterization from the feces of puppies with diarrhea. Fecal samples were obtained from 14 German shepherd puppies with diarrhea over 1 week (7 females and 7 males, 2-9 months of age) residing on a dog farm in August 2007. Species-specific PCR assay identified P. hominis 18S rRNA genes in 3 of the 14 puppies (1 female and 2 males; 1 aged 2 months and 2 aged 9 months). This phylogenetic analysis established that P. hominis belonged to the 1st clade, which is comprised of Bos taurus and Felines.

Isolation of Pichia burtonii from the Feces of an Enteritis Bearded Dragon (Pogona vitticeps) (장염을 나타낸 bearded dragon의 분변에서 Pichia burtonii의 분리)

  • Kang, Hyo-Min;Han, Jae-Ik;Lee, Sook-Jin;Jang, Hye-Jin;Na, Ki-Jeong
    • Journal of Veterinary Clinics
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    • v.28 no.2
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    • pp.254-257
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    • 2011
  • A 2-year-old bearded dragon was referred to the Veterinary Medical Center at the College of Veterinary Medicine, Chungbuk National University with reduced activity and anorexia. On fecal examination, over growth of a bacteria and the proliferation of a yeast-like organism were found. The patient diagnosed with enteritis. By using fungal cultures and molecular typing, the yeast was identified as Pichia (P.) burtonii. The bearded dragon was treated with oral ketoconazole and trimethoprim/sulfamethoxazole. After 3 days, the dragon was recovered and fecal examination showed that the yeast had disappeared from the feces. The strain P. burtonii is supposed opportunistic pathogen in bearded dragon with enteritis according to its reports in a human. This report is the first paper about overgrowth of P. burtonii in a bearded dragon.

Identification and characterization of shiga toxin-producing Escherichia coli isolated from the feces of slaughtered pigs (도축돈 장분변으로부터 Shiga Toxin-Producing Escherchia coli의 분리 와 성상)

  • Song, Young-hwan;Kim, Ji-young;Chae, Mi-kyung;Park, Chang-sik;Kim, Myung-chul;Jun, Moo-hyung
    • Korean Journal of Veterinary Research
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    • v.44 no.4
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    • pp.551-559
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    • 2004
  • Shiga toxin-producing Escherichia coli (STEC) causes various clinical signs in human and animals, and has been indicated as a global enteropathogen with zoonotic importance. In this study, the feces of healthy pigs were collected from the slaughtered pigs of Daejon abattoir during the period from December 2001 to October 2002. Of 326 specimens, 13 STEC were confirmed by culture, PCR and colony hybridization. The isolates were further studied for toxin types, pathogenic factors, plasmid profiles, and antimicrobial resistance to characterize the genetic and toxigenic properties. In PCR, all of 13 isolates were evident to have shiga toxin gene (stx). Of 13 isolates stx1 gene was detected in 4 and stx2 gene in 9. The genes of eaeA, hlyA and rfbE were not present in any isolates. In colony hybridization using shiga toxin common primer (STXc), 2 to 9 per 100 colonies subcultured from 13 isolates showed the positive reaction. In the examination for plasmid profiles of the isolates, one to eleven plasmids with varying sizes of 1.0 Kb to 100 Kb were detected, and the 13 STEC could be classified into four groups by the plasmid patterns. The antimicrobial resistance patterns of the isolates were comparably corresponded with the plasmid profile patterns.

Probiotics Inhibit Lipopolysaccharide-Induced Interleukin-8 Secretion from Intestinal Epithelial Cells

  • Oh, Hyun-Wook;Jeun, Gi-Hoon;Lee, Jin;Chun, Tae-Hoon;Kim, Sae-Hun
    • Food Science of Animal Resources
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    • v.32 no.4
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    • pp.434-440
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    • 2012
  • It has been suggested that probiotics could be useful for the prevention of symptomatic relapse in patients with inflammatory bowel disease (IBD). Interleukin (IL)-8 has been well recognized as one of the pro-inflammatory cytokines that could trigger inflammation and epithelial barrier dysfunction. In this study, the anti-inflammatory effects of probiotics were investigated using a human epithelial cell line (HT-29). Probiotics from infant feces and kimchi were tested for their cytotoxicity and effects on adhesion to epithelial cells. The present results show that seven strains could form 70 % adhesion on HT-29. The probiotics used in this study did not affect HT-29 cell viability. To screen anti-inflammatory lactic acid bacteria, HT-29 cells were pretreated with live and heat-killed probiotics, and lipopolysaccharide (LPS) ($1{\mu}g/mL$) was then added to stimulate the cells. The cell culture supernatant was then used to measure IL-8 secretion by ELISA, and the cell pellet was used to determine IL-8 and toll-like receptor (TLR-4) mRNA expression levels by RT-PCR. Some probiotics (KJP421, KDK411, SRK414, E4191, KY21, and KY210) exhibited anti-inflammatory effects through the repression of IL-8 secretion from HT-29 cells. In particular, Lactobacillus salivarius E4191, originating from Egyptian infant feces, not only decreased IL-8 mRNA expression, but also decreased TLR-4 expression. These results indicate that Lactobacillus salivarius E4191 may have a protective effect in intestinal epithelial cells.

Cloning of Chondroitinase ABC from Bacteroides stercoris HJ-15, a Human Intestinal Anaerobic Bacterium (사람 장내세균군집 유래 Bacteorides stericoris HJ-15의 Chondroitinase ABC의 클로닝)

  • Bang, Seo-Hyeon;Shim, Juwon;Hyun, Yang-Jin;Kim, Dong-Hyun
    • Microbiology and Biotechnology Letters
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    • v.44 no.2
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    • pp.140-144
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    • 2016
  • The gene encoding chondroitinase ABC from a genomic library of Bacteroides stercoris HJ-15, which was isolated from human feces, was cloned. The cloned gene consisted of 3,090 bp and was predicted to encode a 1,029−amino-acid protein. The B. stercoris chondroitinase ABC gene was not homologous to other chondroitinase ABC genes; however, its amino acid sequence showed 71% homology to that of Bacteroides thetaiotaomicron. The gene was cloned in the pET-26b+ expression vector and expressed under the T7 promoter in Escherichia coli BL21(DE3). The purified recombinant chondroitinase ABC degraded chondroitin sulfates A, B, and C.

Anti-Obesity Effects of a Mixture of Fermented Ginseng, Bifidobacterium longum BORI, and Lactobacillus paracasei CH88 in High-Fat Diet-Fed Mice

  • Kang, Dayoung;Li, Zhipeng;Ji, Geun Eog
    • Journal of Microbiology and Biotechnology
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    • v.28 no.5
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    • pp.688-696
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    • 2018
  • Ginseng and probiotics have anti-obesity effects in mice fed a high-fat diet (HFD). Absorption of ginsenoside and colonization of probiotics occur in the intestine. In this study, a mixture of fermented ginseng and two probiotics, Bifidobacterium longum BORI and Lactobacillus paracasei CH88, was administered to HFD-fed mice for 9 weeks. The mixture significantly suppressed weight gain (p < 0.05, n = 8) and lipid deposition in the liver and adipose tissues as well as increased the mice's food intake. The adipocyte size of the adipose tissue was significantly decreased in the mixture-fed group, especially when 0.5% fermented ginseng and $5{\times}10^8/ml$ of the two probiotics were used (p < 0.05, n = 10). The expression of TNF-${\alpha}$ in adipose tissue was efficiently downregulated in the mixture-fed group (p < 0.05, n = 4). The supplement also improved the mice's fasting blood glucose levels (p < 0.05, n = 8) and total cholesterol feces excretion (p < 0.05, n = 8). The mixture of fermented ginseng and B. longum BORI and L. paracasei CH88 could have an anti-obesity effect and suppress lipid deposit in the liver and adipose tissues.

Assessment of Lipopolysaccharide-binding Activity of Bifidobacterium and Its Relationship with Cell Surface Hydrophobicity, Autoaggregation, and Inhibition of Interleukin-8 Production

  • Park, Myeong-Soo;Kim, Min-Jeong;Ji, Geun-Eog
    • Journal of Microbiology and Biotechnology
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    • v.17 no.7
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    • pp.1120-1126
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    • 2007
  • This study was performed to screen probiotic bifidobacteria for their ability to bind and neutralize lipopolysaccharides (LPS) from Escherichia coli and to verify the relationship between LPS-binding ability, cell surface hydrophobicity (CSH), and inhibition of LPS-induced interleukin-8 (IL-8) secretion by HT-29 cells of the various bifidobacterial strains. Ninety bifidobacteria isolates from human feces were assessed for their ability to bind fluorescein isothiocyanate (FITC)-labeled LPS from E. coli. Isolates showing 30-60% binding were designated LPS-high binding (LPS-H) and those with less than 15% binding were designated LPS-low binding (LPS-L). The CSH, autoaggregation (AA), and inhibition of LPS-induced IL-8 release from HT-29 cells of the LPS-H and LPS-L groups were evaluated. Five bifidobacteria strains showed high levels of LPS binding, CSH, AA, and inhibition of IL-8 release. However, statistically significant correlations between LPS binding, CSH, AA, and reduction of IL-8 release were not found. Although we could isolate bifidobacteria with high LPS-binding ability, CSH, AA, and inhibition of IL-8 release, each characteristic should be considered as strain dependent. Bifidobacteria with high LPS binding and inhibition of IL-8 release may be good agents for preventing inflammation by neutralizing Gram-negative endotoxins and improving intestinal health.

Comparison of Resistance to ${\gamma}$-Irradiation between Cryptosporidium parvum and Cryptosporidium muris Using In Vivo Infection

  • Yoon, Se-Joung;Yu, Jae-Ran
    • Parasites, Hosts and Diseases
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    • v.49 no.4
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    • pp.423-426
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    • 2011
  • In the genus Cryptosporidium, there are more than 14 species with different sizes and habitats, as well as different hosts. Among these, C. parvum and C. hominis are known to be human pathogens. As C. parvum can survive exposure to harsh environmental conditions, including various disinfectants or high doses of radiation, it is considered to be an important environmental pathogen that may be a threat to human health. However, the resistance of other Cryptosporidium species to various environmental conditions is unknown. In this study, resistance against ${\gamma}$-irradiation was compared between C. parvum and C. muris using in vivo infection in mice. The capability of C. muris to infect mice could be eliminated with 1,000 Gy of ${\gamma}$-irradiation, while C. parvum remained infective in mice after up to 1,000 Gy of ${\gamma}$-irradiation, although the peak number of oocysts per gram of feces decreased to 16% that of non-irradiated oocysts. The difference in radioresistance between these 2 Cryptosporidium species should be investigated by further studies.

Metabolism of Ginseng Saponins by Human Intestinal Bacteria (Park II) (사람의 장내세균에 의한 인삼 사포닌의 대사(제2보))

  • Hasegawa, Hideo;Ha, Joo-Young;Park, Se-Ho;Matumiya, Satoshi;Uchiyama, Masamori;Huh, Jae-Doo;Sung, Jong-Hwan
    • Korean Journal of Pharmacognosy
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    • v.28 no.1
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    • pp.35-41
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    • 1997
  • Following ginsenoside-Rb1-hydrolyzing assay, strictly anaerobic bacteria were isolated from human feces and identified as Prevotella oris. The bacteria hydrolyzed ginsenoside Rb1 and Rd to $20-O-{\beta}-D-glucopyranosyl-20(S)-protopanaxadiol$ (I), ginsenoside Rb2 to $20-O-[{\alpha}-L-arabinofuranosyl (1{\rightarrow}6)-{\beta}-D-glucopyranosyl] - 20(S)-protopanaxadiol$ (ll) and ginsenoside Rc to $20-O-[{\alpha}-L-arabinofuranosyl (1{\rightarrow} 6){\beta}-D-g1ucopyranosyl]-20(S)-protopanaxadiol$ (III) like fecal microflora, but did not attack ginsenoside Re nor Rgl (Protopanaxatriol-type). Pharmacokinetic studies of ginseng saponins was also performed using specific pathogen free rats and demonstrated that the intestinal bacterial metabolites I-111, 20(S)- protopanaxatriol(IV) and 20(S)-protopanaxadiol(V) were absorbed from the intestines to $blood(0.4-5.1\;{\mu}g/ml)$ after oral administration with total saponin(1 g/kg/day).

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