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Bartonella endocarditis

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https://www.readbyqxmd.com/read/28730981/bartonella-quintana-an-unrecognized-cause-of-infective-endocarditis-in-children-in-ethiopia
#1
Diana Tasher, Alona Raucher-Sternfeld, Akiva Tamir, Michael Giladi, Eli Somekh
Bartonella quintana endocarditis, a common cause of culture-negative endocarditis in adults, has rarely been reported in children. We describe 5 patients 7-16 years of age from Ethiopia with heart defects and endocarditis; 4 cases were caused by infection with B. quintana and 1 by Bartonella of undetermined species. All 5 patients were afebrile and oligosymptomatic, although 3 had heart failure. C-reactive protein was normal or slightly elevated, and erythrocyte sedimentation rate was high. The diagnosis was confirmed by echocardiographic demonstration of vegetations, the presence of high Bartonella IgG titers, and identification of B...
August 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28722567/bartonella-infection-in-hematophagous-insectivorous-and-phytophagous-bat-populations-of-central-mexico-and-the-yucatan-peninsula
#2
Matthew J Stuckey, Bruno B Chomel, Guillermo Galvez-Romero, José Ignacio Olave-Leyva, Cirani Obregón-Morales, Hayde Moreno-Sandoval, Nidia Aréchiga-Ceballos, Mónica Salas-Rojas, Alvaro Aguilar-Setién
Although emerging nonviral pathogens remain relatively understudied in bat populations, there is an increasing focus on identifying bat-associated bartonellae around the world. Many novel Bartonella strains have been described from both bats and their arthropod ectoparasites, including Bartonella mayotimonensis, a zoonotic agent of human endocarditis. This cross-sectional study was designed to describe novel Bartonella strains isolated from bats sampled in Mexico and evaluate factors potentially associated with infection...
June 12, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28659319/laboratory-diagnosis-of-infective-endocarditis
#3
Rachael M Liesman, Bobbi S Pritt, Joseph J Maleszewski, Robin Patel
Infective endocarditis is life-threatening; identification of the underlying etiology informs optimized individual patient management. Changing epidemiology, advances in blood culture techniques, and new diagnostics guide the application of laboratory testing for diagnosis of endocarditis. Blood cultures remain the standard test for microbial diagnosis, with directed serological testing (i.e., Q fever serology, Bartonella serology) in culture-negative cases. Histopathology and molecular diagnostics (e.g., 16S ribosomal RNA gene PCR/sequencing, Trophyerma whipplei PCR) may be applied to resected valves to aid in diagnosis...
June 28, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28633264/rapidly-progressive-bioprosthetic-aortic-valve-stenosis-due-to-bartonella-species-endocarditis
#4
Kathy Schnitzer, Zafrir Or, Shtiwi Sawaed, Erez Sharoni, Naiel Bisharat
Rapid progression of valvular stenosis in the setting of infective endocarditis is extremely rare. Here we describe a patient with Bartonella endocarditis on a bioprosthetic aortic valve that caused rapidly progressive aortic stenosis without regurgitation. At operation the bioprosthetic valve was severely fibrotic and calcified, with markedly thickened and distorted leaflets and circular partial detachment from the aortic ring. The patient underwent aortic root replacement with aortic bioprosthesis and aortic grafting with reimplantation of the coronary ostia...
July 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28526098/first-description-of-bartonella-koehlerae-infection-in-a-spanish-dog-with-infective-endocarditis
#5
María-Dolores Tabar, Laura Altet, Ricardo G Maggi, Jaume Altimira, Xavier Roura
BACKGROUND: Bartonella koehlerae has been recently described as a new cat- and cat fleas-associated agent of culture-negative human endocarditis. It has been also encountered in one dog from Israel and six dogs from the USA, but other clinically relevant reports involving this bacterium are lacking. RESULTS: A 7-year-old intact male mixed dog presented with clinico-pathological signs consistent with mitral endocarditis and cutaneous hemangiosarcoma. Molecular studies revealed the presence of Bartonella koehlerae DNA in samples from blood and mitral valve tissue...
May 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28490579/bartonella-species-an-emerging-cause-of-blood-culture-negative-endocarditis
#6
REVIEW
Udoka Okaro, Anteneh Addisu, Beata Casanas, Burt Anderson
Since the reclassification of the genus Bartonella in 1993, the number of species has grown from 1 to 45 currently designated members. Likewise, the association of different Bartonella species with human disease continues to grow, as does the range of clinical presentations associated with these bacteria. Among these, blood-culture-negative endocarditis stands out as a common, often undiagnosed, clinical presentation of infection with several different Bartonella species. The limitations of laboratory tests resulting in this underdiagnosis of Bartonella endocarditis are discussed...
July 2017: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/28446372/prosthetic-valve-endocarditis-caused-by-bartonella-henselae-presenting-as-recurrent-fever-and-imitating-granulomatosis-with-polyangiitis
#7
Ryuichi Sada, Shunsuke Uno, Naoto Hosokawa, Tomoyoshi Komiya
No abstract text is available yet for this article.
April 23, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28418306/management-of-bartonella-prosthetic-valve-endocarditis-without-cardiac-surgery
#8
Padmasayee Papineni, Aisling Carroll, Johannes Radvan, Carolyn Hemsley, John Chambers, Nicholas Cortes, Timothy Harrison, John L Klein
Two cases of Bartonella prosthetic valve endocarditis were cured when treated for 2 weeks with gentamicin and 3 months with doxycycline. Clinical cure correlated with decreased Bartonella antibody titers. This report suggests a strategy to monitor, treat, and cure Bartonella prosthetic valve endocarditis.
May 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28412525/liver-microbiome-of-peromyscus-leucopus-a-key-reservoir-host-species-for-emerging-infectious-diseases-in-north-america
#9
A André, A Mouton, V Millien, J Michaux
Microbiome studies generally focus on the gut microbiome, which is composed of a large proportion of commensal bacteria. Here we propose a first analysis of the liver microbiome using next generation sequencing as a tool to detect potentially pathogenic strains. We used Peromyscus leucopus, the main reservoir host species of Lyme disease in eastern North America, as a model and sequenced V5-V6 regions of the 16S gene from 18 populations in southern Quebec (Canada). The Lactobacillus genus was found to dominate the liver microbiome...
April 13, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28403058/multiorgan-involvement-confounding-the-diagnosis-of-bartonella-henselae-infective-endocarditis-in-children-with-congenital-heart-disease
#10
Christopher P Ouellette, Sarita Joshi, Karen Texter, Preeti Jaggi
Two children with congenital heart disease status post surgical correction presented with prolonged constitutional symptoms, hepatosplenomegaly and pancytopenia. Concern for malignancy prompted bone marrow biopsies that were without evidence thereof. In case 1, echocardiography identified a multilobulated vegetation on the conduit valve. In case 2, transthoracic, transesophageal and intracardiac echocardiography were performed and were without evidence of cardiac vegetations; however, pulmonic emboli raised concern for infective endocarditis...
May 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28372886/laboratory-approach-to-the-diagnosis-of-culture-negative-infective-endocarditis
#11
REVIEW
S Subedi, Z Jennings, S C-A Chen
Blood-culture negative endocarditis (BCNE) accounts for up to 35% of all cases of infective endocarditis (IE) and is a serious life-threatening condition with considerable morbidity and mortality. Rapid detection and identification of the causative pathogen is essential for timely, directed therapy. Blood-culture negative endocarditis presents a diagnostic and therapeutic challenge. Causes of BCNE are varied including: treatment with antibiotic agents prior to blood culture collection; sub-optimal specimen collection; and/or infection due to fastidious (eg...
March 16, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28348772/case-series-of-bartonella-quintana-blood-culture-negative-endocarditis-in-washington-dc
#12
Fisseha Y Ghidey, Osamuyimen Igbinosa, Kristin Mills, Leon Lai, Christian Woods, Maria E Ruiz, Dawn Fishbein, Rahul Sampath, Robert Lowery, Glenn Wortmann
INTRODUCTION: Prior studies (predominantly from Europe) have demonstrated blood culture-negative endocarditis due to Bartonella. Our objective was to describe three cases of Bartonella quintana endocarditis identified within one year at a large hospital in Washington, DC, USA. CASE PRESENTATION: We constructed a descriptive case series from a retrospective review of medical records from April to December 2013 at an 800-bed urban hospital. All three patients (ages: 52, 55 and 57 years) were undomiciled/homeless men with a history of alcoholism...
August 2016: JMM Case Reports
https://www.readbyqxmd.com/read/28293411/a-strange-manifestation-of-malaria-in-a-native-nigerian-boy
#13
Paola Magro, Ilaria Izzo, Barbara Saccani, Salvatore Casari, Silvio Caligaris, Lina Rachele Tomasoni, Alberto Matteelli, Annamaria Lombardi, Antonella Meini, Francesco Castelli
The protective role of Sickle Cell Trait (SCT) in malaria endemic areas has been proved, and prevalence of HbS gene in malaria endemic areas is high. Splenic infarction is a well-known complication of SCT, while the association with malaria is considered rare. A Nigerian boy was admitted to our ward after returning from his country of origin, for P. falciparum malaria. He underwent abdominal ultrasound for upper right abdominal pain, showing cholecystitis and multiple splenic lesions suggestive of abscesses...
2017: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/28290975/death-of-military-working-dogs-due-to-bartonella-vinsonii-subspecies-berkhoffii-genotype-iii-endocarditis-and-myocarditis
#14
Leslie M Shelnutt, Nandhakumar Balakrishnan, Justin DeVanna, Kenneth L Batey, Edward B Breitschwerdt
OBJECTIVES: As a result of extensive field-related activities, military working dogs (MWDs) have an increased occupational risk for acquiring vector-borne infectious diseases. METHODS: Indirect fluorescent antibody, Bartonella alpha-proteobacteria growth medium enrichment culture, and 16-23S Bartonella intergenic transcribed spacer polymerase chain reaction were performed using blood, serum, or tissue specimens. RESULTS: Endocarditis was diagnosed in three MWDs infected with Bartonella vinsonii subspecies (subsp...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28221109/potentially-zoonotic-bartonella-in-bats-from-france-and-spain
#15
Matthew J Stuckey, Henri-Jean Boulouis, Florence Cliquet, Evelyne Picard-Meyer, Alexandre Servat, Nidia Aréchiga-Ceballos, Juan E Echevarría, Bruno B Chomel
We detected Bartonella in 11 of 109 insectivorous bats from France and 1 of 26 bats from Spain. These genetic variants are closely related to bat-associated Bartonella described in Finland and the United Kingdom and to B. mayotimonensis, the agent of a human endocarditis case in the United States.
March 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28165925/molecular-detection-of-candidatus-bartonella-mayotimonensis-in-north-american-bats
#16
Thomas M Lilley, Cali A Wilson, Riley F Bernard, Emma V Willcox, Eero J Vesterinen, Quinn M R Webber, Laura Kurpiers, Jenni M Prokkola, Imran Ejotre, Allen Kurta, Kenneth A Field, DeeAnn M Reeder, Arto T Pulliainen
Candidatus Bartonella mayotimonensis was detected in 2010 from an aortic valve sample of a patient with endocarditis from Iowa, the United States of America. The environmental source of the potentially new endocarditis-causing Bartonella remained elusive. We set out to study the prevalence and diversity of bat-associated Bartonella in North America. During 2015, mist nets and harp traps were used to capture 92 bats belonging to two species: little brown myotis (Myotis lucifugus Le Conte 1831, n = 73) and the gray myotis (M...
April 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28027277/multi-organ-involvement-confounding-the-diagnosis-of-bartonella-henselae-infective-endocarditis-in-children-with-congenital-heart-disease
#17
Christopher P Ouellette, Sarita Joshi, Karen Texter, Preeti Jaggi
Two children with congenital heart disease status-post surgical correction presented with prolonged constitutional symptoms, hepatosplenomegaly and pancytopenia. Concern for malignancy prompted bone marrow biopsies that were without evidence thereof. In case #1, echocardiography identified a multilobulated vegetation on the conduit valve. In case #2, transthoracic, transesophageal and intracardiac echocardiography were performed and were without evidence of cardiac vegetations, however pulmonic emboli raised concern for infective endocarditis...
December 23, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27885316/bartonella-endocarditis-and-pauci-immune-glomerulonephritis-a-case-report-and-review-of-the-literature
#18
REVIEW
Jillian E Raybould, Alison L Raybould, Megan K Morales, Misbah Zaheer, Michael S Lipkowitz, Joseph G Timpone, Princy N Kumar
Among culture-negative endocarditis in the United States, Bartonella species are the most common cause, with Bartonella henselae and Bartonella quintana comprising the majority of cases. Kidney manifestations, particularly glomerulonephritis, are common sequelae of infectious endocarditis, with nearly half of all Bartonella patients demonstrating renal involvement. Although a pauci-immune pattern is a frequent finding in infectious endocarditis-associated glomerulonephritis, it is rarely reported in Bartonella endocarditis...
September 2016: Infectious Diseases in Clinical Practice: IDCP
https://www.readbyqxmd.com/read/27844027/prosthetic-valve-endocarditis-caused-by-bartonella-henselae-a-case-report-of-molecular-diagnostics-informing-nonsurgical-management
#19
Patricia Bartley, Emmanouil Angelakis, Didier Raoult, Rangarajan Sampath, Robert A Bonomo, Robin L P Jump
Identifying the pathogen responsible for culture-negative valve endocarditis often depends on molecular studies performed on surgical specimens. A patient with Ehlers-Danlos syndrome who had an aortic graft, a mechanical aortic valve, and a mitral anulloplasty ring presented with culture-negative prosthetic valve endocarditis and aortic graft infection. Research-based polymerase chain reaction (PCR)/electrospray ionization mass spectrometry on peripheral blood samples identified Bartonella henselae. Quantitative PCR targeting the16S-23S ribonucleic acid intergenic region and Western immunoblotting confirmed this result...
October 2016: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/27790856/a-family-of-genus-specific-rnas-in-tandem-with-dna-binding-proteins-control-expression-of-the-bada-major-virulence-factor-gene-in-bartonella-henselae
#20
Nhan Tu, Ronan K Carroll, Andy Weiss, Lindsey N Shaw, Gael Nicolas, Sarah Thomas, Amorce Lima, Udoka Okaro, Burt Anderson
Bartonella henselae is a gram-negative zoonotic bacterium that causes infections in humans including endocarditis and bacillary angiomatosis. B. henselae has been shown to grow as large aggregates and form biofilms in vitro. The aggregative growth and the angiogenic host response requires the trimeric autotransporter adhesin BadA. We examined the transcriptome of the Houston-1 strain of B. henselae using RNA-seq revealing nine novel, highly-expressed intergenic transcripts (Bartonella regulatory transcript, Brt1-9)...
April 2017: MicrobiologyOpen
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