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Rothia mucilaginosa

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https://www.readbyqxmd.com/read/29323823/atrioesophageal-fistula-a-rare-complication-of-radiofrequency-ablation
#1
Inbar Saporta, Adithya Chennamadhavuni, Michael J Dolan
75-year-old woman was admitted with fever, chills, altered mentation, and right-sided weakness. A month earlier, she had undergone catheter radiofrequency ablation for treatment of chronic atrial fibrillation. A magnetic resonance imaging scan of her brain revealed septic emboli with multiple bilateral cerebral and cerebellar infarcts, as well as extensive bilateral leptomeningeal enhancement. Blood cultures were positive for Streptococcus mitis, Rothia mucilaginosa, Streptococcus pneumonia, and Candida albicans, which suggested a connection between gastrointestinal and cardiovascular systems...
June 2017: WMJ: Official Publication of the State Medical Society of Wisconsin
https://www.readbyqxmd.com/read/29286019/rothia-mucilaginosa-bacteraemia-in-an-immunocompetent-paediatric-patient-a-new-pathogen-to-take-into-account-a-case-report
#2
Silvia Luque-Pérez, Elena Cobos-Carrascosa, Jessica Guarino-Narváez, Verónica Fernández-Puentes, José M Eiros, Antonio Sánchez-Porto
Rothia mucilaginosa, previously known as Stomatococcus mucilaginosus, is a Gram-positive coccus that is part of the oropharyngeal microbiota and upper respiratory tract. It is mainly related to infections in immunosuppressed patients. Given its complex microbiological identification, its prevalence may be underestimated. We describe in this article a case of bacteraemia by Rothia in an immunocompetent paediatric patient without epidemiological or medical relevant history. In the available literature no cases of bacteraemia by Rothia mucilaginosa in immunocompetent paediatric patients have been reported...
December 1, 2017: Le Infezioni in Medicina
https://www.readbyqxmd.com/read/29250055/the-microbiome-of-potentially-malignant-oral-leukoplakia-exhibits-enrichment-for-fusobacterium-leptotrichia-campylobacter-and-rothia-species
#3
Abdrazak Amer, Sheila Galvin, Claire M Healy, Gary P Moran
Oral leukoplakia presents as a white patch on the oral mucosa and is recognized as having significant malignant potential. Although colonization of these patches with Candida albicans is common, little is known about the bacterial microbiota of these patches. In the current study we analyzed the microbiome of oral leukoplakia in 36 patients compared to healthy mucosal tissue from the same patients and healthy control subjects to determine if specific microbial enrichments could be identified early in the malignant process that could play a role in the progression of the disease...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29233117/elizabethkingia-miricola-as-an-opportunistic-oral-pathogen-associated-with-superinfectious-complications-in-humoral-immunodeficiency-a-case-report
#4
Przemysław Zdziarski, Mariola Paściak, Klaudia Rogala, Agnieszka Korzeniowska-Kowal, Andrzej Gamian
BACKGROUND: Elizabethkingia miricola is a rare Gram-negative bacterium found in water and clinical specimens. Typical culturing methods often misidentify Elizabethkingia spp. as Flavobacterium or Chryseobacterium. Although diagnosis is based on culturing samples taken from sterile sites, such as blood, a proper identification of this bacterium requires an expertise that goes beyond the capabilities of a typical clinical laboratory. CASE PRESENTATION: A 35-year-old woman diagnosed with common variable immunodeficiency was admitted to our center...
December 12, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29149111/-bilateral-bronchopneumonia-due-to-rothia-mucilaginosa
#5
B De Escalante Yangüela, A Gracia Gutiérrez, B C Gracia Tello, V A Alastrué Del Castaño, E Bueno Juana, S Algárate Cajo
Rothia mucilaginosa (R. mucilaginosa), formerly named Stomatococcus mucilaginosus, is a facultatively anaerobic, encapsulated gram-positive coccus, which forms part of the normal oropharyngeal and is rarely considered to be a pathogen in immunocompetent patients, although it can produce, on rare occasions, serious infections like bacteremia, endocarditis and respiratory infections; such as pneumonia, pleural empyema or superinfection of bronchiectasis. We present the case of a 74-year-old male diagnosed with right basal pneumonia of torpid evolution with a poor initial response to different antibiotics, with clinical and radiological worsening and the appearance of bilateral bronchopneumonia with pseudonodular images...
November 17, 2017: Anales del Sistema Sanitario de Navarra
https://www.readbyqxmd.com/read/29121069/developing-selective-media-for-quantification-of-multispecies-biofilms-following-antibiotic-treatment
#6
Eva Vandeplassche, Tom Coenye, Aurélie Crabbé
The lungs of cystic fibrosis (CF) patients are chronically colonized by a polymicrobial biofilm community, leading to difficult-to-treat infections. To combat these infections, CF patients are commonly treated with a variety of antibiotics. Understanding the dynamics of polymicrobial community composition in response to antibiotic therapy is essential in the search for novel therapies. Culture-dependent quantification of individual bacteria from defined multispecies biofilms is frequently carried out by plating on selective media...
2017: PloS One
https://www.readbyqxmd.com/read/28740343/distinct-gut-microbiota-profiles-in-patients-with-primary-sclerosing-cholangitis-and-ulcerative-colitis
#7
Lukas Bajer, Miloslav Kverka, Martin Kostovcik, Peter Macinga, Jiri Dvorak, Zuzana Stehlikova, Jan Brezina, Pavel Wohl, Julius Spicak, Pavel Drastich
AIM: To characterize the gut bacterial microbiota of patients with primary sclerosing cholangitis (PSC) and ulcerative colitis (UC). METHODS: Stool samples were collected and relevant clinical data obtained from 106 study participants, 43 PSC patients with (n = 32) or without (n = 11) concomitant inflammatory bowel disease, 32 UC patients, and 31 healthy controls. The V3 and V4 regions of the 16S ribosomal RNA gene were sequenced on Illumina MiSeq platform to cover low taxonomic levels...
July 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28500338/inflammatory-bacteriome-featuring-fusobacterium-nucleatum-and-pseudomonas-aeruginosa-identified-in-association-with-oral-squamous-cell-carcinoma
#8
Nezar Noor Al-Hebshi, Akram Thabet Nasher, Mohamed Yousef Maryoud, Husham E Homeida, Tsute Chen, Ali Mohamed Idris, Newell W Johnson
Studies on the possible association between bacteria and oral squamous cell carcinoma (OSCC) remain inconclusive, largely due to methodological variations/limitations. The objective of this study was to characterize the species composition as well as functional potential of the bacteriome associated with OSCC. DNA obtained from 20 fresh OSCC biopsies (cases) and 20 deep-epithelium swabs (matched control subjects) was sequenced for the V1-V3 region using Illumina's 2 × 300 bp chemistry. High quality, non-chimeric merged reads were classified to species level using a prioritized BLASTN-algorithm...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28480145/insights-of-the-dental-calculi-microbiome-of-pre-columbian-inhabitants-from-puerto-rico
#9
Tasha M Santiago-Rodriguez, Yvonne Narganes-Storde, Luis Chanlatte-Baik, Gary A Toranzos, Raul J Cano
BACKGROUND: The study of ancient microorganisms in mineralized dental plaque or calculi is providing insights into microbial evolution, as well as lifestyles and disease states of extinct cultures; yet, little is still known about the oral microbial community structure and function of pre-Columbian Caribbean cultures. In the present study, we investigated the dental calculi microbiome and predicted function of one of these cultures, known as the Saladoid. The Saladoids were horticulturalists that emphasized root-crop production...
2017: PeerJ
https://www.readbyqxmd.com/read/28293681/community-level-differences-in-the-microbiome-of-healthy-wild-mallards-and-those-infected-by-influenza-a-viruses
#10
Holly H Ganz, Ladan Doroud, Alana J Firl, Sarah M Hird, Jonathan A Eisen, Walter M Boyce
Waterfowl, especially ducks and geese, are primary reservoirs for influenza A viruses (IAVs) that evolve and emerge as important pathogens in domestic animals and humans. In contrast to humans, where IAVs infect the respiratory tract and cause significant morbidity and mortality, IAVs infect the gastrointestinal tract of waterfowl and cause little or no pathology and are spread by fecal-oral transmission. For this reason, we examined whether IAV infection is associated with differences in the cloacal microbiome of mallards (Anas platyrhyncos), an important host of IAVs in North America and Eurasia...
January 2017: MSystems
https://www.readbyqxmd.com/read/28194750/differential-responses-of-human-dendritic-cells-to-metabolites-from-the-oral-airway-microbiome
#11
K Whiteson, S Agrawal, A Agrawal
Small molecule metabolites that are produced or altered by host-associated microbial communities are emerging as significant immune response modifiers. However, there is a key gap in our knowledge of how oral microbial metabolites affect the immune response. Here, we examined the effects of metabolites from five bacterial strains found commonly in the oral/airway microbial communities of humans. The five strains, each isolated from cystic fibrosis patient sputum, were Pseudomonas aeruginosa FLR01 non-mucoid (P1) and FLR02 mucoid (P2) forms, Streptococcus pneumoniae (Sp), S...
June 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28070022/stable-isotope-profiles-reveal-active-production-of-vocs-from-human-associated-microbes
#12
Joann Phan, Simone Meinardi, Barbara Barletta, Donald R Blake, Katrine Whiteson
Volatile organic compounds (VOCs) measured from exhaled breath have great promise for the diagnosis of bacterial infections. However, determining human or microbial origin of VOCs detected in breath remains a great challenge. For example, the microbial fermentation product 2,3-butanedione was recently found in the breath of Cystic Fibrosis (CF) patients; parallel culture-independent metagenomic sequencing of the same samples revealed that Streptococcus and Rothia spp. have the genetic capacity to produce 2,3-butanedione...
February 6, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/27606659/bacteremia-caused-by-rothia-mucilaginosa-after-pneumonia-in-a-patient-with-hematopoietic-stem-cell-transplantation
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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