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Helicobacter
Published in Dongyou Liu, Handbook of Foodborne Diseases, 2018
The genus Helicobacter belongs to the family Helicobacteraceae, order Campylobacterales, class Epsilonproteobacteria, phylum Proteobacteria, and domain Bacteria. Following the discovery of H. pylori, the number of species within the Helicobacter genus has expanded to more than 50, including both gastric and enterohepatic helicobacters, as updated on the National Center for Biotechnology Information taxonomy database.5,7,8 Sequencing analyses of 16S rRNA, gyrB,9 and heat-shock protein (HSP60)10 genes have aided the determination of Helicobacter phylogeny and taxonomy. The non–H. pylori helicobacters (NHPH) are now attracting attention for their pathogenicity and are classified into gastric and enterohepatic helicobacters.
Campylobacter Jejuni Infection
Published in Meera Chand, John Holton, Case Studies in Infection Control, 2018
The family Campylobacteraceae includes the genera Campylobacter and Arcobacter. These are taxonomically closely related to the family Helicobacteraceae, which contains many Helicobacter species, notably H. pylori, which was initially thought to be a Campylobacter species. Both families lay within the epsilonproteobacteria. There are over 20 species of Campylobacter, but C. jejuni causes most infections.
Effect of Huangqin decoction on regulating intestinal flora in colitis mice characterized as inhibition of the NOD2-dependent pathway
Published in Pharmaceutical Biology, 2022
Shaowei Huang, Jinrong He, Yanping Chen, Xiaojing Wang, Yanyang Li, Yulin Su, Ruyan Wen, Xiuling Li, Guanghua Yang, Shuang Luo, Lian Zhou, Xia Luo
In addition, the phylum classification of intestinal flora species showed that Bacteroidetes decreased, while Deferribacteres and Firmicutes increased significantly in colitis mice (Figure 4(e)). Moreover, Actinobacteria, Bacteroidetes, and Epsilon-proteobacteria decreased, and Bacilli, Betaproteobacteria, Clostridia, Deferribacteres increased significantly at the class level in colitis mice (Figure 4(e_). SASP and HQD reduced the abundance of Deferribacteres at the phylum and class level. In addition, the family classification showed that Helicobacteraceae, S24-7 decreased, while Alcaligenaceae, Anaplasmataceae, Bifidobacteriaceae, Deferribacteraceae, Lachnospiraceae, and Ruminococcaceae increased significantly in colitis mice (Figure 4(e)). SASP and HQD decreased the abundance of Alcaligenaceae and Deferribacteraceae at the family level (Figure 4(f)).
The role of iron-oxidizing bacteria in biocorrosion: a review
Published in Biofouling, 2018
At approximately the same time, the work of Dang et al (2011) looked at short-term (seven day), in situ colonization patterns of MS in coastal waters of China. They found a diverse community of organisms colonized the steel surfaces, and predominant among these were members of the Zetaproteobacteria. Quantitative PCR (qPCR) analysis showed numbers of Zetaproteobacteria increased by at least four orders of magnitude during the week long duration of the incubation, indicating these putative FeOB were actively growing on the steel surface. A subsequent successional study of longer duration done on the coast of Maine showed a similar pattern (McBeth & Emerson 2016). In this case MS coupons were incubated in both brackish and fully saline coastal seawaters for up to 43 days. In both environments a diverse community was found associated with the coupon surfaces that, in part, reflected the communities of nearby sediment, indicating recruitment of microbial taxa from the sediments. Zetaproteobacteria were present in both cases and accounted for up to 1–2% of the community. A pattern was seen where Zetaproteobacteria tended to be earlier colonizers, eg at 3–13 days, but then either remained static or declined in numbers at longer time periods (i.e. >2 weeks). Members of the Deltaproteobacteria consistent with recognized taxa of SRBs were present and showed an increase in numbers with time. In another parallel to the earlier work of Dang et al. (2011), a substantial presence of Epsilonbacteraeota, the bacterial phylum formerly classified as the class Epsilonproteobacteria (Waite et al. 2017), was found in these incubations. These included relatives of known sulfur-oxidizing genera like Sulfurimonas (family Helicobacteraceae) and Arcobacter (family Campylobacteraceae).
Enhanced removal of antibiotics using Eichhornia crassipes root biomass in an aerobic hollow-fiber membrane bioreactor
Published in Biofouling, 2022
Sevcan Aydin, Duygu Nur Arabacı, Aiyoub Shahi, Hadi Fakhri, Suleyman Ovez
Saprospiraceae, Gracilibacteraceae, Helicobacteraceae, Intrasporangiaceae, and Chitinophagiaceae were the most dominant families in biofilm samples. A substantial decrease was seen in the relative abundance of Gracilibacteraceae in the presence of antibiotics (i.e. in C2.B and EC.B. samples). Members of the Helicobacteraceae were more abundant in the C2.B sample, which means, this family was very dominant in the presence of antibiotics but only in the bioreactor in which WHRB was absent. The addition of WHRB had negative effects on this bacterial family.