Did you mean: weeksella vicosa
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Revista Chilena de Infectologia :... Oct 2011
Topics: Flavobacteriaceae
PubMed: 22051619
DOI: No ID Found -
Boletin Medico Del Hospital Infantil de... 2020Weeksella virosa is one of the two species of the genus Weeksella. Clinical disease due to this bacterium in humans is rare, for which only nine cases have been reported...
BACKGROUND
Weeksella virosa is one of the two species of the genus Weeksella. Clinical disease due to this bacterium in humans is rare, for which only nine cases have been reported in the literature.
CASE REPORT
A 4-year-old male patient was diagnosed with a left orbit rhabdomyosarcoma Stage III and was admitted to a northeast third level referral center in Mexico. Aerobic, non-pigmented, Gram-negative rod was isolated from a blood culture. W. virosa was identified by Sensititre™ ARIS. This organism has been described in cases of spontaneous bacterial peritonitis, sepsis, pneumonia, ventriculitis, and urinary tract infection.
CONCLUSIONS
Clinicians should consider the diagnosis of W. virosa bacteremia in cases involving immunocompromised patients with oral lesions, although it is infrequent. To the best of our knowledge, this is the first clinical report of W. virosa bacteremia described in an immunocompromised pediatric patient.
Topics: Bacteremia; Child; Child, Preschool; Flavobacteriaceae; Humans; Male; Rhabdomyosarcoma, Embryonal; Sepsis
PubMed: 32496471
DOI: 10.24875/BMHIM.19000205 -
BMC Infectious Diseases Jan 2024Weeksella virosa pneumonia is an infection that has been described as a healthcare-associated infection. This is a rare gram-negative anaerobic bacterium associated with...
BACKGROUND
Weeksella virosa pneumonia is an infection that has been described as a healthcare-associated infection. This is a rare gram-negative anaerobic bacterium associated with the use of mechanical ventilation for a long period of time and is more frequent in immunosuppressed patients. This is the first case reported in the state of Veracruz and the second in Mexico.
CASE PRESENTATION
We present the case of a 64-year-old female from Veracruz, Mexico who developed an infectious process in the right pelvic limb after a transcatheter aortic valve replacement procedure and subsequently developed sudden cardiorespiratory arrest requiring mechanical ventilation, with subsequent imaging studies demonstrating a pneumonic process associated with a nosocomial infection.
DISCUSSION AND CONCLUSIONS
We should take into consideration that this pathogen affects not only adults with multiple comorbidities but also children with renal, hepatic, or oncological pathologies, as well as immunocompromised patients, who should be considered high-risk populations for W. virosa infection.
Topics: Adult; Female; Child; Humans; Middle Aged; Pneumonia, Ventilator-Associated; Base Composition; Phylogeny; RNA, Ribosomal, 16S; Sequence Analysis, DNA; Bacteria, Aerobic; Cross Infection
PubMed: 38166822
DOI: 10.1186/s12879-023-08927-0 -
Acta Neurochirurgica Nov 2017A 49-year-old female underwent multiple craniotomies for resection of recurrent malignant meningiomata (WHO grade III). She re-presented with sepsis due to a ventricular...
A 49-year-old female underwent multiple craniotomies for resection of recurrent malignant meningiomata (WHO grade III). She re-presented with sepsis due to a ventricular empyema. The craniotomy wound was urgently debrided, and isolates of the gram-negative rod, Weeksella virosa, were identified on 16S PCR. This species is most commonly found as a genitourinary commensal. We present the first documented intracranial infection by Weeksella virosa and its successful treatment with oral β-lactam antibiotics.
Topics: Central Nervous System Infections; Craniotomy; Empyema; Female; Gram-Negative Bacterial Infections; Humans; Meningeal Neoplasms; Meningioma; Middle Aged; Neurosurgical Procedures; Postoperative Complications; Sepsis; Surgical Wound Infection
PubMed: 28852877
DOI: 10.1007/s00701-017-3307-9 -
Acta Microbiologica Et Immunologica... Dec 2019Weeksella virosa is an atypical Gram-negative bacterium that does not grow on MacConkey agar. In this report, we present a 4-year-old female patient with Addison's...
Weeksella virosa is an atypical Gram-negative bacterium that does not grow on MacConkey agar. In this report, we present a 4-year-old female patient with Addison's disease and end-stage renal failure secondary to focal sclerosing glomerulosclerosis. Continuous ambulatory peritoneal dialysis had been performed, and 3 months later, the patient developed fever, diarrhea, and vomiting. Peritoneal fluid culture and dialysis fluid culture were positive for W. virosa. It was identified with Phoenix (BD, USA) and confirmed via 16S rRNA sequencing. It cannot be identified by Maldi Biotyper (Bruker). The isolate was found to be resistant to cephalosporins, ciprofloxacin, and amikacin by gradient test. Intraperitoneal cefepime was initiated but since antimicrobial susceptibility testing revealed cephalosporin resistance, therapy was changed to intraperitoneal meropenem. Following the removal of peritoneal dialysis catheter, fever, abdominal distention, and vomiting were resolved. Piperacillin, aztreonam, and carbapenems can be used for empirical therapy. Antimicrobial susceptibility testing should be performed to guide the choice of treatment. Removal of peritoneal dialysis catheter is an important step of management of this infection. To our knowledge, this is the first report of W. virosa in a pediatric patient and first report from Turkey.
PubMed: 31813264
DOI: 10.1556/030.66.2019.027 -
Journal of Clinical Pathology Feb 1988The antimicrobial susceptibilities, biochemical properties, and cultural characteristics of six strains of Weeksella virosa (formerly group IIf) were determined. The...
The antimicrobial susceptibilities, biochemical properties, and cultural characteristics of six strains of Weeksella virosa (formerly group IIf) were determined. The main characteristics of this non-fermentative organism were production of cytochrome oxidase, gelatinase, and indole, but a lack of saccharolytic activity. A study was then made of the isolation rates of Weeksella virosa from high vaginal swabs from 300 women: a healthy control group (n = 100), a general group with symptoms of vaginal infection (n = 100), and 100 women from a remand centre, where likelihood of exposure to sexually transmitted disease might be expected to be higher. The incidence of Weeksella virosa was found to be 2% in the first two groups. This suggests that, irrespective of the presence of pathogens, the incidence of the species in the general female population is around 2%. A much higher incidence (15%) was found in the third group, suggesting sexual transmission of the organism.
Topics: Anti-Bacterial Agents; Female; Gram-Negative Bacteria; Humans; Kanamycin; Microbial Sensitivity Tests; Neomycin; Trimethoprim; Vagina
PubMed: 3350982
DOI: 10.1136/jcp.41.2.211 -
Journal of Clinical Microbiology Dec 2012Weeksella virosa is an aerobic Gram-negative rod that has rarely been reported to cause infection. We describe a fatal case of W. virosa sepsis in a young female with...
Weeksella virosa is an aerobic Gram-negative rod that has rarely been reported to cause infection. We describe a fatal case of W. virosa sepsis in a young female with end-stage renal disease, report three additional cases of W. virosa infection, and review the literature regarding this infection.
Topics: Adult; Anti-Bacterial Agents; Fatal Outcome; Female; Flavobacteriaceae; Flavobacteriaceae Infections; Humans; Kidney Failure, Chronic; Microbial Sensitivity Tests; Sepsis
PubMed: 23035202
DOI: 10.1128/JCM.01761-12 -
Standards in Genomic Sciences Feb 2011Weeksella virosa Holmes et al. 1987 is the sole member and type species of the genus Weeksella which belongs to the family Flavobacteriaceae of the phylum Bacteroidetes....
Weeksella virosa Holmes et al. 1987 is the sole member and type species of the genus Weeksella which belongs to the family Flavobacteriaceae of the phylum Bacteroidetes. Twenty-nine isolates, collected from clinical specimens provided the basis for the taxon description. While the species seems to be a saprophyte of the mucous membranes of healthy man and warm-blooded animals a causal relationship with disease has been reported in a few instances. Except for the ability to produce indole and to hydrolyze Tween and proteins such as casein and gelatin, this aerobic, non-motile, non-pigmented bacterial species is metabolically inert in most traditional biochemical tests. The 2,272,954 bp long genome with its 2,105 protein-coding and 76 RNA genes consists of one circular chromosome and is a part of the Genomic Encyclopedia of Bacteria and Archaea project.
PubMed: 21475590
DOI: 10.4056/sigs.1603927 -
Journal of Clinical Microbiology Oct 1990Weeksella virosa (formerly CDC group IIf) is a nonsaccharolytic, oxidase- and catalase-positive, gram-negative rod which is unable to grow on MacConkey agar. At 48 h of...
Weeksella virosa (formerly CDC group IIf) is a nonsaccharolytic, oxidase- and catalase-positive, gram-negative rod which is unable to grow on MacConkey agar. At 48 h of incubation on blood or chocolate agar, the colonies present a characteristic appearance: intensely mucoid, adherent, and cream colored as a result of the production of a nondiffusible yellow pigment. This microorganism has been isolated predominantly from the female genitourinary tract, which indicates the opportunity for sexual transmission. We present the microbiological study of three strains of W. virosa identified in a study of 707 female genital samples, representing an incidence of 0.42%. At the same time, we analyzed the principal biochemical tests used in the identification of this microorganism and the susceptibilities of the organism to the different antimicrobial agents assayed.
Topics: Female; Flavobacterium; Humans; Microbial Sensitivity Tests; Terminology as Topic; Urogenital System
PubMed: 2229364
DOI: 10.1128/jcm.28.10.2357-2359.1990 -
International Journal of Systematic and... May 2014A Gram-reaction-negative, yellow-pigmented, strictly aerobic bacterium, designated M0116T, was isolated from the sediment of the Mohe Basin in north-east China....
Moheibacter sediminis gen. nov., sp. nov., a member of the family Flavobacteriaceae isolated from sediment, and emended descriptions of Empedobacter brevis, Wautersiella falsenii and Weeksella virosa.
A Gram-reaction-negative, yellow-pigmented, strictly aerobic bacterium, designated M0116T, was isolated from the sediment of the Mohe Basin in north-east China. Flexirubin-type pigments were produced. Cells were catalase- and oxidase-positive and non-gliding rods. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain M0116T was a member of the family Flavobacteriaceae and was most closely related to members of the genera Empedobacter, Wautersiella and Weeksella with 90.5-91.0% sequence similarities. The major cellular fatty acids were iso-C15:0 and iso-C17:0 3-OH. The major respiratory quinone was MK-6 and the major polar lipid was phosphatidylethanolamine. The DNA G+C content was 38.2 mol%. Based on phenotypic, phylogenetic and genotypic data, strain M0116T is considered to represent a novel species of a new genus in the family Flavobacteriaceae, for which the name Moheibacter sediminis gen. nov., sp. nov. is proposed. The type strain is M0116T (=CGMCC 1.12708T=JCM 19634T). Emended descriptions of Empedobacter brevis, Wautersiella falsenii and Weeksella virosa are also proposed.
Topics: Bacterial Typing Techniques; Base Composition; China; DNA, Bacterial; Fatty Acids; Flavobacteriaceae; Geologic Sediments; Molecular Sequence Data; Phosphatidylethanolamines; Phylogeny; Pigmentation; RNA, Ribosomal, 16S; Sequence Analysis, DNA; Vitamin K 2
PubMed: 24453231
DOI: 10.1099/ijs.0.060178-0