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Bartonella endocarditis

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https://www.readbyqxmd.com/read/28418306/management-of-bartonella-prosthetic-valve-endocarditis-without-cardiac-surgery
#1
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
#2
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 12, 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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#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...
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
#11
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
#12
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
#13
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
https://www.readbyqxmd.com/read/27746451/bartonella-henselae-infective-endocarditis-detected-by-a-prolonged-blood-culture
#14
Tsutomu Mito, Yusuke Hirota, Shingo Suzuki, Kazutaka Noda, Takanori Uehara, Yoshiyuki Ohira, Masatomi Ikusaka
A 65-year-old Japanese man was admitted with a 4-month history of fatigue and exertional dyspnea. Transthoracic echocardiography revealed a vegetation on the aortic valve and severe aortic regurgitation. Accordingly, infective endocarditis and heart failure were diagnosed. Although a blood culture was negative on day 7 after admission, a prolonged blood culture with subculture was performed according to the patient's history of contact with cats. Consequently, Bartonella henselae was isolated. Bartonella species are fastidious bacteria that cause blood culture-negative infective endocarditis...
2016: Internal Medicine
https://www.readbyqxmd.com/read/27651404/unexpected-severe-native-aortic-subacute-endocarditis-due-to-bartonella-quintana-in-a-40-year-old-woman-with-good-socioeconomic-condition
#15
Julien Saison, Brahim Harbaoui, Coralie Bouchiat, Matteo Pozzi, Tristan Ferry
No abstract text is available yet for this article.
September 20, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27375211/the-centenary-of-the-discovery-of-trench-fever-an-emerging-infectious-disease-of-world-war-1
#16
REVIEW
Gregory M Anstead
In 1915, a British medical officer on the Western Front reported on a soldier with relapsing fever, headache, dizziness, lumbago, and shin pain. Within months, additional cases were described, mostly in frontline troops, and the new disease was called trench fever. More than 1 million troops were infected with trench fever during World War 1, with each affected soldier unfit for duty for more than 60 days. Diagnosis was challenging, because there were no pathognomonic signs and symptoms and the causative organism could not be cultured...
August 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27316654/development-of-fluorogenic-probe-based-and-high-resolution-melting-based-polymerase-chain-reaction-assays-for-the-detection-and-differentiation-of-bartonella-quintana-and-bartonella-henselae
#17
Yun-Yan Liu, Long-Sheng Zhao, Xiu-Ping Song, Peng-Chen Du, Dong-Mei Li, Zhong-Ke Chen, Qi-Yong Liu
Bartonella henselae and Bartonella quintana are the major etiological agents of infective endocarditis, which pose a serious threat to human health. To simultaneously detect and differentiate B. henselae and B. quintana, a reliable and fast method to simultaneously detect and differentiate B. henselae and B. quintana is required. In this study, we developed and validated two rapid, highly sensitive and specific, duplex, real-time polymerase chain reaction (PCR) assays-one based on high-resolution melting (HRM) analysis, and the other on TaqMan probes-to simultaneously detect and differentiate B...
June 14, 2016: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27283084/infective-endocarditis-in-13-cats
#18
Jean-Sébastien Palerme, Ashley E Jones, Jessica L Ward, Nandhakumar Balakrishnan, Keith E Linder, Edward B Breitschwerdt, Bruce W Keene
INTRODUCTION: To describe the clinical presentation, clinicopathological abnormalities and outcomes of a series of cats diagnosed with infective endocarditis (IE) at two tertiary care referral institutions. ANIMALS: Thirteen client-owned cats presenting to the cardiology or emergency services of tertiary referral institutions with a diagnosis of endocarditis based on the modified Duke criteria. MATERIALS AND METHODS: Retrospective case series...
September 2016: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/27138665/culture-negative-endocarditis-due-to-bartonella-quintana
#19
Vineshree Mischka Moodley, Tienie T S Zeeman, C H Johan Van Greune, Craig Corcoran
Bartonella spp. was first described as a possible cause of culture-negative endocarditis in 1993, and has since emerged as a significant cause of this condition worldwide. We describe a complicated case of culture-negative endocarditis in an immune-competent male patient, which was confirmed on resected heart valves to have been caused by Bartonella quintana by broad-range 16S ribosomal RNA polymerase chain reaction. The objective of this report is to highlight the clinical, diagnostic and therapeutic challenges of Bartonella endocarditis...
May 2016: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/27127672/splenorenal-manifestations-of-bartonella-henselae-infection-in-a-pediatric-patient
#20
Taylor Rising, Nicholas Fulton, Pauravi Vasavada
Bartonella henselae is a bacterium which can cause a wide range of clinical manifestations, ranging from fever of unknown origin to a potentially fatal endocarditis. We report a case of Bartonella henselae infection in a pediatric-aged patient following a scratch from a kitten. The patient initially presented with a prolonged fever of unknown origin which was unresponsive to antibiotic treatment. The patient was hospitalized with worsening fevers and night sweat. Subsequent ultrasound imaging demonstrated multiple hypoechoic foci within the spleen...
2016: Case Reports in Radiology
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