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1.
Infect Dis Now ; 54(2): 104841, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38012989

RESUMO

OBJECTIVES: To compare the direct and indirect medical costs for patients with suspected Lyme borreliosis according to whether or not they had used an informal care pathway. PATIENTS AND METHODS: We retraced the care pathways of participating patients by a prospective questionnaire survey and a retrospective analysis of care records. Direct and indirect costs were estimated using a micro-costing method from different perspectives. We compared the costs of patients who had consulted a "Lyme Doctor" (informal care pathway) with those who had only used the formal care pathway. Non-parametric tests were appraised the significance of the differences between the two groups of patients. RESULTS: Out of 103 eligible patients, 49 (including 12 having used an informal health care pathway) agreed to be investigated. Five expenditure items entirely borne by patients were significantly higher for patients following an informal care pathway: productivity loss (3041 ± 6580 vs 194 ± 1177 euros, p = 0.01), alternative therapies (3484 ± 7308 vs 369 ± 956 euros), biological tests sent abroad (571 ± 1415 vs 17 ± 92 euros, p < 0.01), self-medication (918 ± 1998 vs 133 ± 689, p = 0.02) and transport (3 094 ± 3456 vs 1 123 ± 1903p = 0.01). CONCLUSIONS: From the patient's standpoint, the informal care pathway involving consultation with a Lyme Doctor is far more expensive than the formal care pathway. More specifically, the patient has to bear the costs of alternative treatments and repeated, non-recommended examinations.


Assuntos
Procedimentos Clínicos , Doença de Lyme , Humanos , Estudos Retrospectivos , Estudos Prospectivos , Doença de Lyme/diagnóstico , Doença de Lyme/tratamento farmacológico , Assistência ao Paciente
2.
Altern Ther Health Med ; 29(5): 86-89, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37392196

RESUMO

Background: The Borrelia species is recognized to cause a myriad of non-specific symptoms among Lyme patients. It has also been documented in the literature to have the ability to incite autoimmune responses. Despite this, very few clinical cases have ever put together the autoimmune connection to such infections, including in Crohn's disease. Case Presentation: A 14-year-old adolescent male with a previous diagnosis of Crohn's disease was discovered to have underlying Lyme disease caused by Borrelia burgdorferi infection. Identifying this as a potential cause of his autoimmune condition, an integrative medical approach was initiated, resulting in successful treatment and complete remission. Conclusions: Lyme disease should be recognized as a potential trigger of autoimmune conditions, especially Crohn's disease. This underlying cause is novel to the literature and may help many patients obtain the proper diagnosis so that curative treatment may be received.


Assuntos
Doenças Autoimunes , Borrelia burgdorferi , Doença de Crohn , Doenças Inflamatórias Intestinais , Doença de Lyme , Adolescente , Humanos , Masculino , Doença de Crohn/complicações , Doença de Crohn/diagnóstico , Doença de Lyme/complicações , Doença de Lyme/diagnóstico , Doença de Lyme/tratamento farmacológico
3.
Cell ; 184(21): 5405-5418.e16, 2021 10 14.
Artigo em Inglês | MEDLINE | ID: mdl-34619078

RESUMO

Lyme disease is on the rise. Caused by a spirochete Borreliella burgdorferi, it affects an estimated 500,000 people in the United States alone. The antibiotics currently used to treat Lyme disease are broad spectrum, damage the microbiome, and select for resistance in non-target bacteria. We therefore sought to identify a compound acting selectively against B. burgdorferi. A screen of soil micro-organisms revealed a compound highly selective against spirochetes, including B. burgdorferi. Unexpectedly, this compound was determined to be hygromycin A, a known antimicrobial produced by Streptomyces hygroscopicus. Hygromycin A targets the ribosomes and is taken up by B. burgdorferi, explaining its selectivity. Hygromycin A cleared the B. burgdorferi infection in mice, including animals that ingested the compound in a bait, and was less disruptive to the fecal microbiome than clinically relevant antibiotics. This selective antibiotic holds the promise of providing a better therapeutic for Lyme disease and eradicating it in the environment.


Assuntos
Antibacterianos/uso terapêutico , Doença de Lyme/tratamento farmacológico , Animais , Borrelia burgdorferi/efeitos dos fármacos , Calibragem , Cinamatos/química , Cinamatos/farmacologia , Cinamatos/uso terapêutico , Avaliação Pré-Clínica de Medicamentos , Fezes/microbiologia , Feminino , Células HEK293 , Células Hep G2 , Humanos , Higromicina B/análogos & derivados , Higromicina B/química , Higromicina B/farmacologia , Higromicina B/uso terapêutico , Doença de Lyme/microbiologia , Camundongos , Testes de Sensibilidade Microbiana , Microbiota/efeitos dos fármacos
4.
R I Med J (2013) ; 104(8): 30-34, 2021 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-34582513

RESUMO

BACKGROUND: Mixed quantitative and qualitative research methods may be useful for characterizing the experiences of patients with post-treatment Lyme disease syndrome. METHODS: 15 participants completed demographic and screening questions, surveys assessing quality of life, fatigue, pain, cognitive functioning, and other patient- reported outcomes, a semi-structured in-depth interview, and consented to a Lyme-related medical chart review. RESULTS: Participants reported mild to moderate symptoms and functional impairments on patient-reported outcome surveys and in-depth interviews. Participants reported on a number of management strategies that they found more or less effective in managing their symptoms. Participants endorsed the need for better clinical assessment of symptom patterns over time, greater Lyme-related education for providers, more holistic approaches to diagnosis and care, and the desire to participate in Lyme-focused support groups. CONCLUSIONS: Overall, participants desired a more holistic approach to diagnosis, symptom assessment, and symptom management. Recommendations for future research and clinical considerations are discussed.


Assuntos
Doença de Lyme , Síndrome Pós-Lyme , Fadiga/etiologia , Humanos , Doença de Lyme/diagnóstico , Doença de Lyme/tratamento farmacológico , Qualidade de Vida , Rhode Island
5.
BMJ ; 369: m1041, 2020 May 26.
Artigo em Inglês | MEDLINE | ID: mdl-32457042

RESUMO

Lyme borreliosis is the most common vectorborne disease in the northern hemisphere. It usually begins with erythema migrans; early disseminated infection particularly causes multiple erythema migrans or neurologic disease, and late manifestations predominantly include arthritis in North America, and acrodermatitis chronica atrophicans (ACA) in Europe. Diagnosis of Lyme borreliosis is based on characteristic clinical signs and symptoms, complemented by serological confirmation of infection once an antibody response has been mounted. Manifestations usually respond to appropriate antibiotic regimens, but the disease can be followed by sequelae, such as immune arthritis or residual damage to affected tissues. A subset of individuals reports persistent symptoms, including fatigue, pain, arthralgia, and neurocognitive symptoms, which in some people are severe enough to fulfil the criteria for post-treatment Lyme disease syndrome. The reported prevalence of such persistent symptoms following antimicrobial treatment varies considerably, and its pathophysiology is unclear. Persistent active infection in humans has not been identified as a cause of this syndrome, and randomized treatment trials have invariably failed to show any benefit of prolonged antibiotic treatment. For prevention of Lyme borreliosis, post-exposure prophylaxis may be indicated in specific cases, and novel vaccine strategies are under development.


Assuntos
Antibacterianos/uso terapêutico , Doença de Lyme/tratamento farmacológico , Doença de Lyme/patologia , Acrodermatite/etiologia , Acrodermatite/patologia , Antibacterianos/administração & dosagem , Artrite/diagnóstico , Artrite/etiologia , Artrite/microbiologia , Grupo Borrelia Burgdorferi/genética , Eritema Migrans Crônico/etiologia , Eritema Migrans Crônico/microbiologia , Eritema Migrans Crônico/patologia , Europa (Continente)/epidemiologia , Feminino , Humanos , Doença de Lyme/sangue , Doença de Lyme/epidemiologia , Masculino , América do Norte/epidemiologia , Síndrome Pós-Lyme/epidemiologia , Prevalência
6.
Sci Rep ; 10(1): 3798, 2020 03 02.
Artigo em Inglês | MEDLINE | ID: mdl-32123189

RESUMO

Lyme disease is one of most common vector-borne diseases, reporting more than 300,000 cases annually in the United States. Treating Lyme disease during its initial stages with traditional tetracycline antibiotics is effective. However, 10-20% of patients treated with antibiotic therapy still shows prolonged symptoms of fatigue, musculoskeletal pain, and perceived cognitive impairment. When these symptoms persists for more than 6 months to years after completing conventional antibiotics treatment are called post-treatment Lyme disease syndrome (PTLDS). Though the exact reason for the prolongation of post treatment symptoms are not known, the growing evidence from recent studies suggests it might be due to the existence of drug-tolerant persisters. In order to identify effective drug molecules that kill drug-tolerant borrelia we have tested two antibiotics, azlocillin and cefotaxime that were identified by us earlier. The in vitro efficacy studies of azlocillin and cefotaxime on drug-tolerant persisters were done by semisolid plating method. The results obtained were compared with one of the currently prescribed antibiotic doxycycline. We found that azlocillin completely kills late log phase and 7-10 days old stationary phase B. burgdorferi. Our results also demonstrate that azlocillin and cefotaxime can effectively kill in vitro doxycycline-tolerant B. burgdorferi. Moreover, the combination drug treatment of azlocillin and cefotaxime effectively killed doxycycline-tolerant B. burgdorferi. Furthermore, when tested in vivo, azlocillin has shown good efficacy against B. burgdorferi in mice model. These seminal findings strongly suggests that azlocillin can be effective in treating B. burgdorferi sensu stricto JLB31 infection and furthermore in depth research is necessary to evaluate its potential use for Lyme disease therapy.


Assuntos
Antibacterianos/administração & dosagem , Azlocilina/administração & dosagem , Borrelia burgdorferi/efeitos dos fármacos , Doença de Lyme/tratamento farmacológico , Animais , Borrelia burgdorferi/fisiologia , Modelos Animais de Doenças , Avaliação Pré-Clínica de Medicamentos , Farmacorresistência Bacteriana , Feminino , Humanos , Doença de Lyme/microbiologia , Camundongos Endogâmicos C3H
7.
Dermatol Clin ; 37(4): 443-454, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31466585

RESUMO

Primary cutaneous B-cell lymphomas are a group of diseases with indolent and aggressive behavior. The goal of the initial workup is to evaluate for systemic involvement, provide adequate staging, and guide therapy. Histopathological studies are a critical part of the workup for classification of these lymphomas because they are similar to their nodal counterparts. There are limited data for treatment guidelines, and thus, therapy differs among institutions. Overall, localized therapies are preferred for indolent types and chemotherapy or immunotherapy for the aggressive forms.


Assuntos
Antineoplásicos/uso terapêutico , Procedimentos Cirúrgicos Dermatológicos , Linfoma de Células B/terapia , Neoplasias Cutâneas/terapia , Administração Cutânea , Corticosteroides/uso terapêutico , Antibacterianos/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Bexaroteno/uso terapêutico , Borrelia burgdorferi , Ciclofosfamida/uso terapêutico , Procedimentos Cirúrgicos de Citorredução , Gerenciamento Clínico , Doxorrubicina/análogos & derivados , Doxorrubicina/uso terapêutico , Humanos , Injeções Intralesionais , Doença de Lyme/tratamento farmacológico , Linfoma de Células B/diagnóstico , Linfoma de Células B/patologia , Linfoma de Zona Marginal Tipo Células B/diagnóstico , Linfoma de Zona Marginal Tipo Células B/microbiologia , Linfoma de Zona Marginal Tipo Células B/patologia , Linfoma de Zona Marginal Tipo Células B/terapia , Linfoma Difuso de Grandes Células B/diagnóstico , Linfoma Difuso de Grandes Células B/patologia , Linfoma Difuso de Grandes Células B/terapia , Mecloretamina/uso terapêutico , Polietilenoglicóis/uso terapêutico , Prednisona/uso terapêutico , Rituximab/uso terapêutico , Neoplasias Cutâneas/diagnóstico , Neoplasias Cutâneas/patologia , Vincristina/uso terapêutico
8.
Clin Infect Dis ; 68(12): 2060-2066, 2019 05 30.
Artigo em Inglês | MEDLINE | ID: mdl-30239603

RESUMO

BACKGROUND: There is no precise idea whether patients with chronic symptoms attributed to Lyme borreliosis (LB) have LB or another disease. METHODS: We evaluated patients consulting for a presumed LB with a holistic approach including presumptive treatment. We included symptomatic patients consulting for presumed LB. They were classified as confirmed LB when they met four criteria, and possible LB if three with a positive clinical response to presumptive treatment. RESULTS: Amongst the 301 patients, 275 (91%) were exposed to tick bites, and 165 (54%) were bitten by a tick. At presentation, 151 patients (50.1%) had already been treated with a median of one (1-22) course of antimicrobials, during 34 (28-730) days. Median number of symptoms was three (1-12) with a median duration of 16 (1-68) months. Median number of signs was zero (0-2). ELISA was positive in 84/295 (28.4%) for IgM and 86/295 (29.1%) for IgG, and immunoblot was positive in 21/191 (10.9%) for IgM and 50/191 (26.1 %) for IgG. Presumptive treatment after presentation failed in 46/88 patients (52%). Diagnosis of LB was confirmed in 29 patients (9.6%), and possible in 9 (2.9%). Of the 243 patients with non-LB diagnosis, diseases were psychological, musculoskeletal, neurological or other origin in 76 (31.2%), 48 (19.7%), 37 (15.2%) and 82 (33.7%) patients respectively. Patients with other diseases were significantly younger, having more symptoms, longest duration of symptoms, less clinical signs and less frequent LB positive serologies. CONCLUSIONS: Overdiagnosis and overtreatment of LB is worsening. Health authorities should investigate this phenomenon.


Assuntos
Saúde Holística , Doença de Lyme/epidemiologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Anticorpos Antibacterianos/farmacologia , Anticorpos Antibacterianos/uso terapêutico , Borrelia burgdorferi , Criança , Gerenciamento Clínico , Feminino , Humanos , Doença de Lyme/diagnóstico , Doença de Lyme/tratamento farmacológico , Doença de Lyme/microbiologia , Masculino , Pessoa de Meia-Idade , Adulto Jovem
10.
BMJ Open ; 8(6): e021367, 2018 06 11.
Artigo em Inglês | MEDLINE | ID: mdl-29895655

RESUMO

OBJECTIVE: For many individuals with Lyme disease, prompt treatment leads to rapid resolution of infection. However, severe complications can occur if treatment is delayed. Our objective was to identify themes around belated diagnosis or treatment of Lyme disease using the General Model of Total Patient Delay (GMTPD). DESIGN: We conducted a qualitative interview study using indepth telephone interviews. SETTING: Participants were patients from a large, integrated health system in the state of Pennsylvania, USA. PARTICIPANTS: There were 26 participants. Participants had to have a diagnosis of Lyme disease between 2014 and 2017 and a positive IgG western blot. We used a stratified purposeful sampling design to identify patients with and without late Lyme disease manifestations. To ensure variation in care experiences, we oversampled patients diagnosed outside of primary care. OUTCOME MEASURES: We asked participants about their experience from first Lyme disease symptoms to treatment. We applied an iterative coding process to identify key themes and then synthesised codes into higher order codes representing the GMTPD stages: appraisal delay (symptom to recognition of illness); illness delay (inferring illness to deciding to seek help); behavioural delay (deciding to seek help to the act of seeking help); scheduling delay (seeking help to attending an appointment); and treatment delay (attending appointment to treatment). RESULTS: Appraisal delay themes included symptom misattribution, intermittent symptoms and misperceptions about the necessity of a bull's-eye rash. Health insurance status was a driver of illness and behavioural delays. Scheduling delay was not noted by participants, in part, because 10 of the 26 patients went to urgent care or emergency department settings. Misdiagnoses were more common in these settings, contributing to treatment delay. CONCLUSION: Our study identified potentially modifiable risk factors for belated treatment. Targeting these risk factors may minimise time to treatment and reduce the occurrence of preventable complications.


Assuntos
Erros de Diagnóstico/estatística & dados numéricos , Doença de Lyme/diagnóstico , Doença de Lyme/tratamento farmacológico , Doença de Lyme/psicologia , Aceitação pelo Paciente de Cuidados de Saúde , Adolescente , Adulto , Idoso , Diagnóstico Tardio , Serviço Hospitalar de Emergência , Feminino , Humanos , Entrevistas como Assunto , Masculino , Pessoa de Meia-Idade , Pennsylvania , Atenção Primária à Saúde , Pesquisa Qualitativa , Fatores de Tempo , Tempo para o Tratamento , Adulto Jovem
11.
Pediatrics ; 141(Suppl 5): S466-S469, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29610173

RESUMO

Lyme disease is caused by Borrelia burgdorferi and can lead to dermatologic, neurologic, cardiac, and musculoskeletal manifestations. The arthritis of Lyme disease is typically monoarticular, with the knee being most commonly involved. Lyme arthritis of small joints has not previously been well described. We report 3 children who presented with sternoclavicular joint swelling and who were found to have Lyme disease based on enzyme-linked immunosorbent assay and Western blot. This description of sternoclavicular Lyme arthritis highlights the importance of considering Lyme disease in the differential and diagnostic workup of new onset, small joint arthritis in patients presenting from or with travel to Lyme endemic regions.


Assuntos
Artrite/microbiologia , Borrelia burgdorferi , Doença de Lyme/diagnóstico , Articulação Esternoclavicular/microbiologia , Adolescente , Antibacterianos/uso terapêutico , Artrite/diagnóstico , Artrite/tratamento farmacológico , Western Blotting , Criança , Pré-Escolar , Doxiciclina/uso terapêutico , Ensaio de Imunoadsorção Enzimática , Humanos , Doença de Lyme/tratamento farmacológico , Masculino
12.
Arthritis Res Ther ; 19(1): 254, 2017 Nov 22.
Artigo em Inglês | MEDLINE | ID: mdl-29166944

RESUMO

BACKGROUND: In the present study, we sought to evaluate the feasibility of targeting vascular adhesion protein-1 (VAP-1) by positron emission tomography (PET) for the longitudinal quantitative assessment of Borrelia burgdorferi infection-induced inflammation in mice. METHODS: Mice with B. burgdorferi infection-induced arthritis were studied. During a 7-week follow-up period, the progression of arthritis was monitored weekly with 68Ga-DOTA-Siglec-9 PET/computed tomography (CT) and measurement of tibiotarsal joint swellings. A subgroup of infected mice was treated with ceftriaxone. Finally, histopathological assessment of joint inflammation was performed and VAP-1 expression in joints were determined. RESULTS: Explicit joint swelling and 68Ga-DOTA-Siglec-9 uptake could be demonstrated in the affected joints from B. burgdorferi-infected mice. By contrast, no obvious accumulation of 68Ga-DOTA-Siglec-9 was detected in joints of uninfected mice. The maximum swelling and highest uptake in the affected joints were observed 4 weeks after the infection. 68Ga-DOTA-Siglec-9 uptake in joints correlated with joint swelling (P < 0.0001) and histopathological scoring of inflammation (P = 0.020). Despite short-term antibiotic treatment, the arthritis persisted, and the PET signal remained as high as in nontreated mice. Immunohistochemistry revealed strong-to-moderate expression of VAP-1 in the synovium of B. burgdorferi-infected mice, while only weak expression of VAP-1 was detected in uninfected mice. CONCLUSIONS: The present study showed that 68Ga-DOTA-Siglec-9 can detect B. burgdorferi infection-induced arthritis in mice. Furthermore, longitudinal PET/CT imaging allowed monitoring of arthritis development over time.


Assuntos
Amina Oxidase (contendo Cobre)/biossíntese , Artrite/diagnóstico por imagem , Moléculas de Adesão Celular/biossíntese , Doença de Lyme/diagnóstico por imagem , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada/métodos , Animais , Antibacterianos/farmacologia , Artrite/tratamento farmacológico , Artrite/microbiologia , Borrelia burgdorferi/efeitos dos fármacos , Borrelia burgdorferi/fisiologia , Ceftriaxona/farmacologia , Modelos Animais de Doenças , Radioisótopos de Gálio/metabolismo , Interações Hospedeiro-Patógeno , Humanos , Imuno-Histoquímica , Doença de Lyme/tratamento farmacológico , Doença de Lyme/microbiologia , Camundongos , Lectinas Semelhantes a Imunoglobulina de Ligação ao Ácido Siálico/metabolismo
13.
BMC Vet Res ; 13(1): 293, 2017 Sep 29.
Artigo em Inglês | MEDLINE | ID: mdl-28962614

RESUMO

BACKGROUND: Lyme disease in humans is predominantly treated with tetracycline, macrolides or beta lactam antibiotics that have low minimum inhibitory concentrations (MIC) against Borrelia burgdorferi. Horses with Lyme disease may require long-term treatment making frequent intravenous or intramuscular treatment difficult and when administered orally those drugs may have either a high incidence of side effects or have poor bioavailability. The aim of the present study was to determine the in vitro susceptibility of three B. burgdorferi isolates to three antibiotics of different classes that are commonly used in practice for treating Borrelia infections in horses. RESULTS: Broth microdilution assays were used to determine minimum inhibitory concentration of three antibiotics (ceftiofur sodium, minocycline and metronidazole), for three Borrelia burgdorferi isolates. Barbour-Stoner-Kelly (BSK K + R) medium with a final inoculum of 106 Borrelia cells/mL and incubation periods of 72 h were used in the determination of MICs. Observed MICs indicated that all isolates had similar susceptibility to each drug but susceptibility to the tested antimicrobial agents varied; ceftiofur sodium (MIC = 0.08 µg/ml), minocycline hydrochloride (MIC = 0.8 µg/ml) and metronidazole (MIC = 50 µg/ml). CONCLUSIONS: The MIC against B. burgorferi varied among the three antibiotics with ceftiofur having the lowest MIC and metronidazole the highest MIC. The MIC values observed for ceftiofur in the study fall within the range of reported serum and tissue concentrations for the drug metabolite following ceftiofur sodium administration as crystalline-free acid. Minocycline and metronidazole treatments, as currently used in equine practice, could fall short of attaining MIC concentrations for B. burgdorferi.


Assuntos
Antibacterianos/farmacologia , Borrelia burgdorferi/efeitos dos fármacos , Cefalosporinas/farmacologia , Doenças dos Cavalos/tratamento farmacológico , Doença de Lyme/veterinária , Metronidazol/farmacologia , Minociclina/farmacologia , Animais , Borrelia burgdorferi/isolamento & purificação , Doenças dos Cavalos/microbiologia , Cavalos , Doença de Lyme/tratamento farmacológico , Testes de Sensibilidade Microbiana
14.
Explore (NY) ; 12(4): 250-5, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27102135

RESUMO

The case study reports on the effect of pharmacological, complementary, and alternative medicine including YNSA, Applied Kinesiology, and respiratory exercises in a 9-year-old boy with facial paralysis. The boy suffered from borreliosis and one-sided facial paralysis that occurred 3.5 weeks after being bitten by a tick and persisted despite 4 weeks of medication with antibiotics. In the first treatment, muscle function as assessed by the coachman׳s test was normalized, and improvement in the facial paralysis was observed. Within 8 additional treatments over a period of 2 months, the boy showed complete recovery. The case shows a multimodal approach to facial paralysis integrating pharmacological treatment and CAM including YNSA, Applied Kinesiology, and breathing exercises.


Assuntos
Terapia por Acupuntura , Exercícios Respiratórios , Paralisia Facial/terapia , Cinesiologia Aplicada , Doença de Lyme/complicações , Couro Cabeludo , Pontos de Acupuntura , Antibacterianos/uso terapêutico , Criança , Terapia Combinada , Paralisia Facial/tratamento farmacológico , Paralisia Facial/etiologia , Humanos , Doença de Lyme/tratamento farmacológico , Masculino
15.
Antimicrob Agents Chemother ; 59(8): 4616-24, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26014929

RESUMO

Borrelia burgdorferi is the causative agent of Lyme disease, which affects an estimated 300,000 people annually in the United States. When treated early, the disease usually resolves, but when left untreated, it can result in symptoms such as arthritis and encephalopathy. Treatment of the late-stage disease may require multiple courses of antibiotic therapy. Given that antibiotic resistance has not been observed for B. burgdorferi, the reason for the recalcitrance of late-stage disease to antibiotics is unclear. In other chronic infections, the presence of drug-tolerant persisters has been linked to recalcitrance of the disease. In this study, we examined the ability of B. burgdorferi to form persisters. Killing growing cultures of B. burgdorferi with antibiotics used to treat the disease was distinctly biphasic, with a small subpopulation of surviving cells. Upon regrowth, these cells formed a new subpopulation of antibiotic-tolerant cells, indicating that these are persisters rather than resistant mutants. The level of persisters increased sharply as the culture transitioned from the exponential to stationary phase. Combinations of antibiotics did not improve killing. Daptomycin, a membrane-active bactericidal antibiotic, killed stationary-phase cells but not persisters. Mitomycin C, an anticancer agent that forms adducts with DNA, killed persisters and eradicated growing and stationary cultures of B. burgdorferi. Finally, we examined the ability of pulse dosing an antibiotic to eliminate persisters. After addition of ceftriaxone, the antibiotic was washed away, surviving persisters were allowed to resuscitate, and the antibiotic was added again. Four pulse doses of ceftriaxone killed persisters, eradicating all live bacteria in the culture.


Assuntos
Antibacterianos/uso terapêutico , Borrelia burgdorferi/efeitos dos fármacos , Farmacorresistência Bacteriana Múltipla/efeitos dos fármacos , Doença de Lyme/tratamento farmacológico , Biofilmes/efeitos dos fármacos , Ceftriaxona/uso terapêutico , Daptomicina/uso terapêutico , Humanos , Testes de Sensibilidade Microbiana/métodos , Mitomicina/uso terapêutico
16.
Curr Treat Options Oncol ; 16(6): 28, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25975444

RESUMO

OPINION STATEMENT: There is strong evidence to corroborate the association with Helicobacter pylori (Hp) to gastric extranodal marginal zone lymphoma (ENMZL) and hepatitis C virus (HCV) to splenic/nodal marginal zone lymphoma. Koch's postulates generally hold for these two associations and eradication of the infectious agent is well supported. Hp eradication (HPE) is recommended as front-line therapy for early stage gastric ENMZL regardless of Hp status. Complete response (CR) rate for Hp-negative patients is not as high as for Hp-positive patients; however, the benign nature of HPE and high rates of salvage allow this strategy to be safe while sparing some Hp-negative patients from systemic therapy or radiation. Similarly for HCV-seropositive patients, treatment with antivirals should be strongly considered as first-line for those who do not require immediate cytoreductive therapy or at some point even after completing chemoimmunotherapy. The controversy regarding the role for antibiotics is greatest for primary ocular adnexal lymphoma (POAL). Considering the low incidence of Chlamydia psittaci (Cp) infection with OAL and the challenges to reliably identifying Cp, we typically do not consider doxycycline in POAL treatment. Involved-field radiotherapy (IFRT) remains the treatment of choice for most with unilateral POAL. However, if reliable detection of Cp is available and Cp is identified, patients with unilateral low tumor stage POAL who do not require immediate radiotherapy could be considered for doxycycline as front-line treatment. Other infectious associations to indolent lymphomas have been made, including Borrelia borgdorferi (Bb) in cutaneous lymphoma and Campylobacter in immunoproliferative small intestinal disease (IPSID), but these associations are not as strong and primary treatment targeting the infectious agents is not recommended.


Assuntos
Anti-Infecciosos/uso terapêutico , Linfoma de Zona Marginal Tipo Células B/patologia , Linfoma de Zona Marginal Tipo Células B/terapia , Linfoma/patologia , Linfoma/terapia , Antibacterianos/uso terapêutico , Antivirais/uso terapêutico , Infecções por Campylobacter/complicações , Infecções por Campylobacter/tratamento farmacológico , Infecções por Campylobacter/microbiologia , Infecções por Helicobacter/complicações , Infecções por Helicobacter/tratamento farmacológico , Infecções por Helicobacter/microbiologia , Hepatite C/complicações , Hepatite C/tratamento farmacológico , Hepatite C/virologia , Humanos , Doença de Lyme/complicações , Doença de Lyme/tratamento farmacológico , Doença de Lyme/microbiologia , Linfoma/etiologia , Linfoma de Zona Marginal Tipo Células B/etiologia , Gradação de Tumores , Psitacose/complicações , Psitacose/tratamento farmacológico , Psitacose/microbiologia
17.
BMJ Case Rep ; 20152015 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-25568264

RESUMO

A 52-year-old Colombian woman, a patient with psoriasis, undergoing phototherapy with (ultraviolet B narrowband) UVBnb, presented with a symptomless solitary diffuse erythaematous plaque on her nose for 3 months. Initially, she was treated with pimecrolimus 1% cream for 8 weeks, which was then combined with metronidazole cream for 4 weeks, with the initial diagnosis of UV-triggered rosacea, without improvement. A punch biopsy was performed and the histology showed a pseudolymphomatous reaction. The diagnosis of nasal pseudolymphoma of borreliosis was confirmed with PCR. The lesion completely resolved following oral doxycycline therapy.


Assuntos
Doença de Lyme/complicações , Doenças Nasais/diagnóstico , Pseudolinfoma/diagnóstico , Rosácea/diagnóstico , Antibacterianos/uso terapêutico , Borrelia burgdorferi , Diagnóstico Diferencial , Doxiciclina/uso terapêutico , Feminino , Humanos , Doença de Lyme/tratamento farmacológico , Pessoa de Meia-Idade , Doenças Nasais/microbiologia , Pseudolinfoma/microbiologia
18.
Scott Med J ; 56(4): 236, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22089054

RESUMO

We report a previously healthy man presenting with life-threatening hyperkalaemia and heart failure. The only possible cause was thought to be the long list of herbal medications he was taking, several of which contained significant amounts of cardiac glycosides. Hyperkalaemia is known to be associated with digoxin toxicity and we present this as the likely cause in this case, and emphasize the importance of a thorough drug history in forming a differential diagnosis.


Assuntos
Glicosídeos Cardíacos/toxicidade , Insuficiência Cardíaca/induzido quimicamente , Hiperpotassemia/induzido quimicamente , Doença de Lyme/tratamento farmacológico , Fitoterapia/efeitos adversos , Insuficiência Cardíaca/diagnóstico , Humanos , Hiperpotassemia/diagnóstico , Doença de Lyme/complicações , Masculino , Pessoa de Meia-Idade
19.
J Clin Rheumatol ; 17(5): 256-65, 2011 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-21778908

RESUMO

Patients with Lyme disease, that is, active infection with Borrelia burgdorferi, experience many types of musculoskeletal complaints, with different explanatory mechanisms. Appropriate therapy depends on understanding the underlying cause of the complaint and addressing that specific root cause. In the case of active infection the dosage, duration, drug, and method of administration of antibiotics should be determined by the state of the infection and history of prior therapy, according to the established and validated recommendations of the Infectious Disease Society of America. Many patients have musculoskeletal complaints not attributable to active infection; some patients have residual complaints following a documented infection that has been adequately treated with antibiotics previously, and others never had true B. burgdorferi infection in the first place. For such patients, antibiotics are not warranted and in fact may be physically and emotionally harmful. Complaints following an episode of Lyme disease are not necessarily due to ongoing infection, especially adequately treated. Consideration of other diagnoses may suggest use of other effective modalities, including physical therapy and emotional support. Appropriate ordering and interpretation of the various validated seroconfirmatory tests available to study B. burgdorferi infection are critical, as these tests are often misapplied and misconstrued in pursuit of strategies aimed at eliminating patients' suffering. Although seronegative Lyme disease has been reported, seronegativity in a reputable laboratory makes the likelihood of Lyme arthritis very low. On the other hand, a positive result from certain unvalidated laboratories or novel assays proves nothing and should not be viewed as substantiating the diagnosis.


Assuntos
Artrite/microbiologia , Doença de Lyme/complicações , Doença de Lyme/tratamento farmacológico , Doenças Musculoesqueléticas/microbiologia , Antibacterianos/uso terapêutico , Borrelia burgdorferi/isolamento & purificação , Borrelia burgdorferi/fisiologia , Diagnóstico Diferencial , Fibromialgia/diagnóstico , Humanos , Doença de Lyme/diagnóstico
20.
Antimicrob Agents Chemother ; 54(2): 643-51, 2010 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19995919

RESUMO

The effectiveness of a new first-in-class antibiotic, tigecycline (glycylcycline), was evaluated during the early dissemination (1 week), early immune (3 weeks), or late persistent (4 months) phases of Borrelia burgdorferi infection in C3H mice. Mice were treated with high or low doses of tigecycline, saline (negative-effect controls), or a previously published regimen of ceftriaxone (positive-effect controls). Infection status was assessed at 3 months after treatment by culture, quantitative ospA real-time PCR, and subcutaneous transplantation of joint and heart tissue into SCID mice. Tissues from all saline-treated mice were culture and ospA PCR positive, tissues from all antibiotic-treated mice were culture negative, and some of the tissues from most of the mice treated with antibiotics were ospA PCR positive, although the DNA marker load was markedly decreased compared to that in saline-treated mice. Antibiotic treatment during the early stage of infection appeared to be more effective than treatment that began during later stages of infection. The viability of noncultivable spirochetes in antibiotic-treated mice (demonstrable by PCR) was confirmed by transplantation of tissue allografts from treated mice into SCID mice, with dissemination of spirochetal DNA to multiple recipient tissues, and by xenodiagnosis, including acquisition by ticks, transmission by ticks to SCID mice, and survival through molting into nymphs and then into adults. Furthermore, PCR-positive heart base tissue from antibiotic-treated mice revealed RNA transcription of several B. burgdorferi genes. These results extended previous studies with ceftriaxone, indicating that antibiotic treatment is unable to clear persisting spirochetes, which remain viable and infectious, but are nondividing or slowly dividing.


Assuntos
Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Borrelia burgdorferi/efeitos dos fármacos , Doença de Lyme/tratamento farmacológico , Minociclina/análogos & derivados , Animais , Antígenos de Superfície/genética , Proteínas da Membrana Bacteriana Externa/genética , Vacinas Bacterianas/genética , Borrelia burgdorferi/genética , Borrelia burgdorferi/fisiologia , Ceftriaxona/farmacologia , Ceftriaxona/uso terapêutico , Feminino , Lipoproteínas/genética , Doença de Lyme/genética , Doença de Lyme/microbiologia , Camundongos , Testes de Sensibilidade Microbiana , Minociclina/farmacologia , Minociclina/uso terapêutico , Reação em Cadeia da Polimerase , Carrapatos/microbiologia , Tigeciclina
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