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Rothia mucilaginosa

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https://www.readbyqxmd.com/read/27606659/bacteremia-caused-by-rothia-mucilaginosa-after-pneumonia-in-a-patient-with-hematopoietic-stem-cell-transplantation
#1
Cihangül Bayhan, Eda Karadag Oncel, Ali B Cengiz, Ayça B Oksüz, Güzide B Aydin
Rothia muciloginosa is a member of normal flora and rarely causes invasive disease. Immunosupressed patients have increased risk for severe infection. Here, we report a male patient with relapsed neuroblastoma hospitalized for pneumonia. After clinical improvement, patient's respiratory symptoms worsened again. Rothia muciloginosa was isolated from blood culture. The worsening of respiratory symptoms can be explained by hematogenous spread of bacteria. He was successfully treated with meropenem and vancomycin for 14 days...
October 1, 2016: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/27469368/identification-of-food-grade-subtilisins-as-gluten-degrading-enzymes-to-treat-celiac-disease
#2
Guoxian Wei, Na Tian, Roland Siezen, Detlef Schuppan, Eva J Helmerhorst
Gluten are proline- and glutamine-rich proteins present in wheat, barley, and rye and contain the immunogenic sequences that drive celiac disease (CD). Rothia mucilaginosa, an oral microbial colonizer, can cleave these gluten epitopes. The aim was to isolate and identify the enzymes and evaluate their potential as novel enzyme therapeutics for CD. The membrane-associated R. mucilaginosa proteins were extracted and separated by DEAE chromatography. Enzyme activities were monitored with paranitroanilide-derivatized and fluorescence resonance energy transfer (FRET) peptide substrates, and by gliadin zymography...
September 1, 2016: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/27193835/species-level-core-oral-bacteriome-identified-by-16s-rrna-pyrosequencing-in-a-healthy-young-arab-population
#3
Nezar Noor Al-Hebshi, Ahmed Abdulhaq, Ahmed Albarrag, Vinod Kumar Basode, Tsute Chen
BACKGROUND: Reports on the composition of oral bacteriome in Arabs are lacking. In addition, the majority of previous studies on other ethnic groups have been limited by low-resolution taxonomic assignment of next-generation sequencing reads. Furthermore, there has been a conflict about the existence of a 'core' bacteriome. OBJECTIVE: The objective of this study was to characterize the healthy core oral bacteriome in a young Arab population at the species level...
2016: Journal of Oral Microbiology
https://www.readbyqxmd.com/read/27103973/first-report-of-acute-postoperative-endophthalmitis-caused-by-rothia-mucilaginosa-after-phacoemulsification
#4
Pablo Álvarez-Ramos, Amparo Del Moral-Ariza, José M Alonso-Maroto, Pilar Marín-Casanova, José M Calandria-Amigueti, Manuel Rodríguez-Iglesias, Enrique Rodríguez de la Rúa
We aimed at reporting the first case of rapidly progressive acute postoperative endophthalmitis after phacoemulsification cataract surgery in an immunocompetent patient caused by Rothia mucilaginosa. An immunocompetent patient manifested endophthalmitis signs 48 hours after an uncomplicated cataract surgery by phacoemulsification. A bacteria of the family Micrococcaceae was cultured in the vitreous biopsy, namely R. mucilaginosa. The patient did not show a favorable clinical response after vitrectomy and systemic, intravitreal, and topical fortified antibiotics...
March 21, 2016: Infectious Disease Reports
https://www.readbyqxmd.com/read/27008920/case-of-late-onset-bleb-associated-endophthalmitis-caused-by-rothia-mucilaginosa
#5
Shinya Oie, Kiyofumi Mochizuki, Kyoko Ishida, Asami Nakayama, Kiyofumi Ohkusu
Rothia mucilaginosa is a gram-positive coagulase-negative coccus of the family Micrococcaceae. Although R. mucilaginosa forms part of the oropharyngeal microflora, it has only recently been isolated in ocular infections. We report a case of a 41-year-old man who developed late-onset bleb-related endophthalmitis (BRE). He had undergone glaucoma surgery 21 years earlier and had a thin-walled cystic bleb prior to the development of endophthalmitis in his right eye. He immediately received intravitreal injections of ceftazidime and vancomycin, topical levofloxacin and cefmenoxime, and intravenous cefozopran...
September 2016: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/26607938/dietary-nitrate-improves-vascular-function-in-patients-with-hypercholesterolemia-a-randomized-double-blind-placebo-controlled-study
#6
RANDOMIZED CONTROLLED TRIAL
Shanti Velmurugan, Jasmine Ming Gan, Krishnaraj S Rathod, Rayomand S Khambata, Suborno M Ghosh, Amy Hartley, Sven Van Eijl, Virag Sagi-Kiss, Tahseen A Chowdhury, Mike Curtis, Gunter G C Kuhnle, William G Wade, Amrita Ahluwalia
BACKGROUND: The beneficial cardiovascular effects of vegetables may be underpinned by their high inorganic nitrate content. OBJECTIVE: We sought to examine the effects of a 6-wk once-daily intake of dietary nitrate (nitrate-rich beetroot juice) compared with placebo intake (nitrate-depleted beetroot juice) on vascular and platelet function in untreated hypercholesterolemics. DESIGN: A total of 69 subjects were recruited in this randomized, double-blind, placebo-controlled parallel study...
January 2016: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/26484045/a-case-of-peritoneal-dialysis-associated-peritonitis-by-rothia-mucilaginosa
#7
Byeong Gwan Kim, A Young Cho, Sang Sun Kim, Seong Hee Lee, Hong Shik Shin, Hyun Ju Yoon, Jeong Gwan Kim, In O Sun, Kwang Young Lee
Rothia muciliaginosa (R. mucilaginosa) is a facultative, Gram-positive coccus that is considered to be part of the normal flora of the mouth and respiratory tract. There are sporadic reports of the organism causing endocarditis in patients with heart valve abnormalities, as well as meningitis, septicemia, and pneumonia associated with intravenous drug abuse. However, it is an unusual pathogen in cases of peritoneal dialysis (PD)-associated peritonitis. Although R. mucilaginosa is generally susceptible to penicillin, ampicillin, cefotaxime, imipenem, rifampicin, and glycopeptides, there are no guidelines for the treatment of PD-associated peritonitis...
September 2015: Kidney Research and Clinical Practice
https://www.readbyqxmd.com/read/26430041/complete-genome-sequence-of-rothia-mucilaginosa-strain-num-rm6536-isolated-from-a-human-oral-cavity
#8
Takayuki Nambu, Osamu Tsuzukibashi, Satoshi Uchibori, Chiho Mashimo
Here, we present the complete genome sequence of Rothia mucilaginosa NUM-Rm6536, a strain isolated from the tongue plaque of a healthy human adult. This strain is amenable to genetic manipulation by transformation and so provides a useful foundation for more detailed investigation of this species.
2015: Genome Announcements
https://www.readbyqxmd.com/read/26256880/-bacteremia-due-to-rothia-mucilaginosa-after-chemotherapy-for-myeloid-malignancies
#9
REVIEW
Sumiko Kohashi, Takehiko Mori, Yuya Koda, Taku Kikuchi, Jun Kato, Takayuki Shimizu, Kayoko Sugita, Naoki Hasegawa, Mitsuru Murata, Shinichiro Okamoto
The number of reported cases of bacteremia due to Rothia mucilaginosa (R. mucilaginosa), a component of the normal flora of human gastrointestinal tract mucosa, is limited. We encountered three cases of bacteremia due to R. mucilaginosa during neutropenia after chemotherapy for myeloid malignancies. Although all three patients were successfully treated with antimicrobial agents, one patient developed disseminated lesions in the lungs and soft tissue. The portal of R. mucilaginosa bacteremia is reportedly mucositis or dental disorders; however, no such complications were identified in our patients...
June 2015: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/26191508/exploring-salivary-microbiota-in-aids-patients-with-different-periodontal-statuses-using-454-gs-flx-titanium-pyrosequencing
#10
Fang Zhang, Shenghua He, Jieqi Jin, Guangyan Dong, Hongkun Wu
Patients with acquired immunodeficiency syndrome (AIDS) are at high risk of opportunistic infections. Oral manifestations have been associated with the level of immunosuppression, these include periodontal diseases, and understanding the microbial populations in the oral cavity is crucial for clinical management. The aim of this study was to examine the salivary bacterial diversity in patients newly admitted to the AIDS ward of the Public Health Clinical Center (China). Saliva samples were collected from 15 patients with AIDS who were randomly recruited between December 2013 and March 2014...
2015: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/26120454/peritonitis-from-rothia-mucilaginosa-in-a-chronic-peritoneal-dialysis-patient
#11
Aileen B Cielo, Michael E Ullian
No abstract text is available yet for this article.
October 2013: Clinical Kidney Journal
https://www.readbyqxmd.com/read/25898134/changes-in-cystic-fibrosis-airway-microbial-community-associated-with-a-severe-decline-in-lung-function
#12
Patrizia Paganin, Ersilia Vita Fiscarelli, Vanessa Tuccio, Manuela Chiancianesi, Giovanni Bacci, Patrizia Morelli, Daniela Dolce, Claudia Dalmastri, Alessandra De Alessandri, Vincenzina Lucidi, Giovanni Taccetti, Alessio Mengoni, Annamaria Bevivino
Cystic fibrosis (CF) is a genetic disease resulting in chronic polymicrobial infections of the airways and progressive decline in lung function. To gain insight into the underlying causes of severe lung diseases, we aimed at comparing the airway microbiota detected in sputum of CF patients with stable lung function (S) versus those with a substantial decline in lung function (SD). Microbiota composition was investigated by using culture-based and culture-independent methods, and by performing multivariate and statistical analyses...
2015: PloS One
https://www.readbyqxmd.com/read/25809116/acetaldehyde-production-by-major-oral-microbes
#13
K Moritani, T Takeshita, Y Shibata, T Ninomiya, Y Kiyohara, Y Yamashita
OBJECTIVES: To assess acetaldehyde (ACH) production by bacteria constituting the oral microbiota and the inhibitory effects of sugar alcohols on ACH production. MATERIALS AND METHODS: The predominant bacterial components of the salivary microbiota of 166 orally healthy subjects were determined by barcoded pyrosequencing analysis of the 16S rRNA gene. Bacterial ACH production from ethanol or glucose was measured using gas chromatography. In addition, inhibition by four sugars and five sugar alcohols of ACH production was assayed...
September 2015: Oral Diseases
https://www.readbyqxmd.com/read/25664502/rothia-mucilaginosa-pneumonia-a-literature-review
#14
REVIEW
Sofia Maraki, Ioannis S Papadakis
BACKGROUND: Rothia mucilaginosa, a gram-positive coccus member of the family Micrococcaceae, is considered part of the normal microflora of the human mouth and the upper respiratory tract. Although this organism is believed to be of low virulence, it is increasingly recognized as an opportunistic pathogen mostly affecting immunocompromised hosts. METHODS: The medical literature was reviewed and we found 19 published cases of R. mucilaginosa pneumonia. We also report on a case of pneumonia attributed to this microorganism in a patient with chronic obstructive pulmonary disease (COPD)...
March 2015: Infectious Diseases
https://www.readbyqxmd.com/read/25581469/normal-bacterial-conjunctival-flora-in-the-huacaya-alpaca-vicugna-pacos
#15
Goedele Storms, Carole Meersschaert, Frédéric Farnir, Magda Grauwels
OBJECTIVE: To describe the bacterial flora of the normal conjunctiva of Huacaya alpacas (Vicugna pacos) and to determine the effect of age and gender on this flora. ANIMALS STUDIED: Fifty Huacaya alpacas. PROCEDURES: After a complete ophthalmic examination, conjunctival swabs were obtained from both eyes and cultured for aerobic and anaerobic bacteria. Logistic and Poisson regression analyses were used to evaluate the effect of age and gender on bacterial isolation...
January 2016: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/25311638/anti-biofilm-and-antibacterial-activities-of-zinc-oxide-nanoparticles-against-the-oral-opportunistic-pathogens-rothia-dentocariosa-and-rothia-mucilaginosa
#16
Shams T Khan, Maqusood Ahamed, Javed Musarrat, Abdulaziz A Al-Khedhairy
Species of the genus Rothia that inhabit the oral cavity have recently been implicated in a number of diseases. To minimize their role in oral infections, it is imperative to reduce and/or control the growth and biofilm formation activity of Rothia spp. In this study, two bacterial isolates, Ora-7 and Ora-16, were obtained from the oral cavity of a healthy male subject and identified as Rothia dentocariosa and Rothia mucilaginosa, respectively, using a polyphasic taxonomic approach. Antimicrobial and anti-biofilm formation activities of zinc oxide nanoparticles (ZnO-NPs), of average size 35 nm, were assessed in in vitro assays using Crystal Violet and live and dead staining techniques...
December 2014: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/25147233/effect-of-rothia-mucilaginosa-enzymes-on-gliadin-gluten-structure-deamidation-and-immunogenic-epitopes-relevant-to-celiac-disease
#17
Na Tian, Guoxian Wei, Detlef Schuppan, Eva J Helmerhorst
Rothia mucilaginosa, a natural microbial inhabitant of the oral cavity, cleaves gluten (gliadin) proteins at regions that are resistant to degradation by mammalian enzymes. The aim of this study was to investigate to what extent the R. mucilaginosa cell-associated enzymes abolish gliadin immunogenic properties. Degradation of total gliadins and highly immunogenic gliadin 33-mer or 26-mer peptides was monitored by SDS-PAGE and RP-HPLC, and fragments were sequenced by liquid chromatography and electrospray ionization tandem mass spectrometer (LC-ESI-MS/MS)...
October 15, 2014: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/24951810/rothia-bacteremia-a-10-year-experience-at-mayo-clinic-rochester-minnesota
#18
Poornima Ramanan, Jason N Barreto, Douglas R Osmon, Pritish K Tosh
Rothia spp. are Gram-positive cocco-bacilli that cause a wide range of serious infections, especially in immunocompromised hosts. Risk factors for Rothia mucilaginosa (previously known as Stomatococcus mucilaginosus) bacteremia include prolonged and profound neutropenia, malignancy, and an indwelling vascular foreign body. Here, we describe 67 adults at the Mayo Clinic in Rochester, MN, from 2002 to 2012 with blood cultures positive for Rothia. Twenty-five of these patients had multiple positive blood cultures, indicating true clinical infection...
September 2014: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/24707276/keratitis-with-kocuria-palustris-and-rothia-mucilaginosa-in-vitamin-a-deficiency
#19
R M Mattern, Jiaxi Ding
PURPOSE: To present a case of unusual corneal infection early in the course of peripheral ulcerative keratitis in a patient with severe vitamin A deficiency. METHOD: Single observational case report in urban USA. CASE PRESENTATION: An alcoholic patient with pancreatitis, chronic diarrhea, and vitamin A deficiency presented with a marginal corneal ulcer from which two bacteria of the family Micrococcaceae were cultured and identified by genome sequence analysis, namely Kocuria palustris and Rothia mucilaginosa...
January 2014: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/24657864/salivary-microbiota-and-metabolome-associated-with-celiac-disease
#20
Ruggiero Francavilla, Danilo Ercolini, Maria Piccolo, Lucia Vannini, Sonya Siragusa, Francesca De Filippis, Ilaria De Pasquale, Raffaella Di Cagno, Michele Di Toma, Giorgia Gozzi, Diana I Serrazanetti, Maria De Angelis, Marco Gobbetti
This study aimed to investigate the salivary microbiota and metabolome of 13 children with celiac disease (CD) under a gluten-free diet (treated celiac disease [T-CD]). The same number of healthy children (HC) was used as controls. The salivary microbiota was analyzed by an integrated approach using culture-dependent and -independent methods. Metabolome analysis was carried out by gas chromatography-mass spectrometry-solid-phase microextraction. Compared to HC, the number of some cultivable bacterial groups (e...
June 2014: Applied and Environmental Microbiology
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