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atypical mycobacteria

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https://www.readbyqxmd.com/read/28224727/molecular-identification-and-distribution-of-non-tuberculous-mycobacteria-isolated-from-clinical-specimens-by-pcr-sequencing-method-in-west-of-iran
#1
Mahsa Dastranj, Abbas Farahani, Abdolrazagh Hashemi Shahraki, Sara Atashi, Parviz Mohajeri
BACKGROUND AND AIMS: Infections by Non-tuberculous Mycobacteria (NTM) has rapidly increased in recent years, due to high infection rates related to the populations at risk like immunocompromised individuals, patients predisposed by prior pulmonary. The aim of this study was to investigate the presence of NTM in clinical samples and genetic diversity using 16S rRNA and rpoB sequence analysis. METHODS: A cross-sectional study was conducted on 45 diverse isolates collected from sputum in two years 2014-2015 using standard decontamination procedure...
February 22, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28178706/coexistent-sarcoidosis-and-tuberculosis-a-case-report
#2
Cristiano Carbonelli, Ernesto Giuffreda, Antonio Palmiotti, Domenico Loizzi, Filippo Lococo, Elisiana Carpagnano, Donato Lacedonia, Francesco Sollitto, Maria Pia Foschino
Necrotizing granulomatous diseases of the lungs are usually dependent on a narrow range of differential diagnoses. Tuberculosis (TB) is responsible for the largest number of cases, while necrotizing sarcoidosis is generally considered a rare and easily distinguishable disease substantially based on histological features. However, this entity has become a viable diagnosis in the absence of mycobacteria isolation or when a remarkable clinical improvement cannot be achieved with the combination of anti-TB drugs at full dosage...
February 9, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28050369/a-case-of-surgical-site-infection-caused-by-mycobacterium-fortuitum-following-herniorrhaphy
#3
N S Madhusudhan, A Malini, Mima Maychet B Sangma
Rapidly Growing Mycobacteria (RGM) are opportunistic pathogens found in the environment. Mycobacterium fortuitum, M. chelonae and M.abscessus are the important human pathogens of this group. They cause wound infections, disseminated cutaneous disease, pulmonary infection in patients with cystic fibrosis or bronchiectasis, bone and joint infections and keratitis. Infections due to these Non-Tuberculous Mycobacteria (NTM) are increasingly reported. Post laparoscopic wound infections, mesh site infections and other surgical site infections due to M...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28043572/identification-and-comparison-of-genetic-pattern-of-human-and-cattle-m-bovis-isolates-from-zanjan-province-by-restriction-fragment-length-polymorphism-and-dna-hybridization
#4
Mahdi Dehghanpour, Nader Mosavari, Hamid Baghchesaraei, Mohammad Mohammad Taheri, Mahdi Babaie
BACKGROUND/OBJECTIVE: Mycobacterium bovis, responsible for bovine tuberculosis is a member of Mycobacterium tuberculosis complex. This bacterium is responsible for infection in wide range of hosts. Bovine tuberculosis is well known as Zoonotic tuberculosis in human and is transmitted via consumption of unpasteurized milk, contaminated meat products and also by ingestion of Mycobacteria from the environment. The objectives of the present study was to compare the genomic pattern of M. bovis obtained from human subjects in Zanjan province, with those of atypic cattle in Iran by Restriction fragment length polymerization and DNA hybridization methods...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043561/identification-of-different-subtypes-of-rapid-growing-atypical-mycobacterium-from-water-and-soil-sources-using-pcr-rflp-using-hsp65-and-rrna-16s-23s-genes
#5
Mohammad Varahram, Parissa Farnia, Shima Saif, Mehran Marashian, Poopak Farnia, Jaladein Ghanavi, Ali Akbar Velayati
OBJECTIVE/BACKGROUND: Nontuberculosis mycobacteria (NTM) are a diverse group of microorganisms that cause a variety of diseases in humans including skin, respiratory, and gastrointestinal tract infection. Generally, NTM are classified into two categories: rapid (<7days) and slow growing (>7days). In this study, we aimed to investigate NTM frequency and prevalence in environmental samples. Additionally, we tried to identify various subtypes of isolated rapid growing mycobacteria (RGM)...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27996281/il-12r%C3%AE-1-defect-presenting-with-massive-intraabdominal-lymphadenopathy-due-to-mycobacterium-intracellulare-a-case-report
#6
Eda Kepenekli Kadayifci, Ayşe Karaaslan, Serkan Atici, Gülşen Akkoç, Safa Bariş, Nurhayat Yakut, Sevliya Öcal Demir, Orhan Kaya KÖksalan, Ahmet Soysal, Caroline Deswarte, Jacinta Bustamante, Jean-Laurent Casanova, Mustafa Bakir
Infections due to non-tuberculous mycobacteria species are problematic for people who have immundeficiency. Mendelian Susceptibility to Mycobacterial Diseases (MSMD) defines a group of genetic defects affecting cellular interactions and IFN-γ pathway. Patients with MSMD may present with disseminated infection due to Bacillus Calmette-Guerin vaccine strain, Mycobacterium tuberculosis complex, environmental NTM or Salmonella species. Atypical mycobacterial infections and deficient granuloma/giant-cell formation are important clues for MSMD especially in patients with the history of parental consanguineous marriage...
December 12, 2016: Asian Pacific Journal of Allergy and Immunology
https://www.readbyqxmd.com/read/27934834/pulmonary-mycobacterium-kansasii-disease-in-immunocompetent-host-treatment-outcomes-with-short-course-chemotherapy
#7
C Padmapriyadarsini, D Nair, N S Gomathi, B Velayudham
Mycobacterium kansasii, most virulent of all atypical mycobacteria, causes pulmonary disease identical to the disease caused by Mycobacterium tuberculosis. Early identification of the species and prompt initiation of treatment for M. kansasii is necessary to prevent morbidity and mortality due to this disease. This case series highlights the similarity in the clinical presentation of both M. tuberculosis and M. kansasii and response to direct observation of short-course chemotherapy with rifampicin, in the management of pulmonary M...
October 2016: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27909634/nontuberculous-mycobacteria-lymphadenitis-a-case-report
#8
Amanda M Krantz, Meera Varnam, Cristina Fernandez
Atypical mycobacteria, also known as nontuberculous mycobacteria (NTM) includes acid-fast bacteria other than Mycobacterium tuberculosis. NTM can be isolated from a variety of environmental sources including water, food products, domestic animals, and soil; human exposure is typically from soil to the oral cavity and respiratory tract. Diagnosis of NTM is suspected in children less than five years old with subacute, unilateral, non-tender cervicofacial lymphadenitis in combination with a history of water exposure, penetrating injection, as well as negative routine cultures or response to antistaphylococcal and antistreptococcal antibiotics...
October 25, 2016: Curēus
https://www.readbyqxmd.com/read/27892398/therapy-resistant-septic-olecranon-bursitis-due-to-mycobacterium-gordonae
#9
Christian Konrads, Kilian Rückl, Mohammed El Tabbakh, Maximilian Rudert, Stefan Kircher, Piet Plumhoff
INTRODUCTION: Septic olecranon bursitis due to atypical mycobacteria is rare. An insidious beginning can delay diagnosis and treatment. Antibacterial therapy recommendations are not well-defined for bursitis caused by atypical mycobacteria. We present a rare case of olecranon bursitis caused by Mycobacterium gordonae, reporting our experiences regarding pathogen identification and antibiotic therapy, which differs from regimes used in common septic bursitis mostly caused by staphylococcus aureus...
2016: SICOT-J
https://www.readbyqxmd.com/read/27868075/novel-mutation-of-interferon-%C3%AE-receptor-1-gene-presenting-as-early-life-mycobacterial-bronchial-disease
#10
Maria J Gutierrez, Neelu Kalra, Alexandra Horwitz, Gustavo Nino
Mendelian susceptibility to mycobacterial diseases (MSMD) are a spectrum of inherited disorders characterized by localized or disseminated infections caused by atypical mycobacteria. Interferon-γ receptor 1 (IFNGR1) deficiency was the first identified genetic disorder recognized as MSMD. Mutations in the genes encoding IFNGR1 can be recessive or dominant and cause complete or partial receptor deficiency. We present the case of a 2½-year-old boy with a history of recurrent wheezing, diagnosed with endobronchial mycobacterial infection...
October 2016: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/27677649/identification-of-aminopyrimidine-sulfonamides-as-potent-modulators-of-wag31-mediated-cell-elongation-in-mycobacteria
#11
Vinayak Singh, Neeraj Dhar, János Pató, Gaëlle S Kolly, Jana Korduláková, Martin Forbak, Joanna C Evans, Rita Székely, Jan Rybniker, Zuzana Palčeková, Júlia Zemanová, Isabella Santi, François Signorino-Gelo, Liliana Rodrigues, Anthony Vocat, Adrian S Covarrubias, Monica G Rengifo, Kai Johnsson, Sherry Mowbray, Joseph Buechler, Vincent Delorme, Priscille Brodin, Graham W Knott, José A Aínsa, Digby F Warner, György Kéri, Katarína Mikušová, John D McKinney, Stewart T Cole, Valerie Mizrahi, Ruben C Hartkoorn
There is an urgent need to discover new anti-tubercular agents with novel mechanisms of action in order to tackle the scourge of drug-resistant tuberculosis. Here, we report the identification of such a molecule - an AminoPYrimidine-Sulfonamide (APYS1) that has potent, bactericidal activity against M. tuberculosis. Mutations in APYS1-resistant M. tuberculosis mapped exclusively to wag31, a gene that encodes a scaffolding protein thought to orchestrate cell elongation. Recombineering confirmed that a Gln201Arg mutation in Wag31 was sufficient to cause resistance to APYS1, however, neither overexpression nor conditional depletion of wag31 impacted M...
January 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/27639948/-pulmonary-infection-with-mycobacterium-malmoense-difficulties-in-diagnosis-and-treatment
#12
D Huet, B Godbert, J Hermann, J-M Zordan, F Chabot, C Andréjak
INTRODUCTION: Pulmonary infection due to Mycobacterium malmoense can be difficult to diagnose. These difficulties can be responsible for a delay in the implementation of optimal treatment. Moreover, the treatment is not standardized. OBSERVATION: We report the case of a 56-year-old patient who developed a Mycobacterium malmoense pulmonary infection whose diagnosis was delayed due to initial suspicion of pulmonary Mycobacterium tuberculosis infection. Once the diagnosis was confirmed, the patient was treated empirically with rifampicin, ethambutol, and clarithromycin for 12 months after culture conversion, giving a total of 15 months...
September 14, 2016: Revue des Maladies Respiratoires
https://www.readbyqxmd.com/read/27516972/mycobacterium-smegmatis-infection-of-a-prosthetic-total-knee-arthroplasty
#13
Zaid Saffo, Anthony Ognjan
The most common organisms causing prosthetic knee joint infections are staphylococci. However, arthroplasty infections with atypical microbial pathogens, such as Mycobacteria can occur. Due to the rarity of mycobacterial prosthetic joint infections, diagnosis, treatment, and management of these atypical infections represent a clinical challenge. A 71-year old female post-operative day 40 after a left total knee arthroplasty was hospitalized secondary to left knee pain and suspected arthroplasty infection. She had failed outpatient oral antimicrobial treatment for superficial stitch abscess; and outpatient IV/Oral antimicrobials for a clinical postoperative septic bursitis...
2016: IDCases
https://www.readbyqxmd.com/read/27468344/multiple-cavitary-pulmonary-nodules-caused-by-mycobacterium-intracellulare
#14
Sang Hoon Yoo, Seo Ree Kim, Joon Young Choi, Jae Woo Choi, Yu Mi Ko, Sun Hee Jang, Jun Kyu Park, Ye Gyu Sung, Yun Jung Park, Su Yun Oh, Se Young Bahk, Ju Hyun Lee, Myung Sook Kim
Nontuberculous mycobacteria (NTM) have been increasingly recognized as an important cause of chronic pulmonary infections. The Mycobacterium avium complex (MAC), which is composed of two species, Mycobacterium avium and Mycobacterium intracelluare, is the most commonly encountered pathogen associated with NTM lung disease. MAC pulmonary infection typically presents in a fibrocavitary form or a nodular bronchiectatic form. However, there have been atypical presentations of MAC pulmonary infections, including solitary pulmonary nodules (SPN)...
July 2016: Korean Journal of Family Medicine
https://www.readbyqxmd.com/read/27411791/-unclear-liver-lesions-in-a-19-year-old-woman-with-acute-myeloid-leukemia
#15
B Braun, A P Karl, C Dierkes, M Schenk, J Braess
A 19-year old woman with acute myeloid leukemia presented with newly observed liver lesions during ongoing consolidation therapy. Due to unexplained cholestasis during induction, biliary duct drainage was performed. Microbiologic and histologic examinations revealed the presence of atypical mycobacteria, namely Mycobacterium abscessus. With an appropriate antiinfective regime which was continuously administered using a portable pump in the outpatient setting, further mycobacterial spread during simultaneous chemotherapy-associated neutropenia was prevented...
November 2016: Der Internist
https://www.readbyqxmd.com/read/27358732/sarcoidosis-with-prevalent-and-severe-joint-localization-a-case-report
#16
Livio G Moccia, Sabrina Castaldo, Emanuela Sirignano, Maddalena Napolitano, Enrica Barra, Alessandro Sanduzzi
BACKGROUND: Sarcoidosis is a systemic granulomatous disease of unknown origin, characterized by the formation of granulomas without central necrosis. Each organ and tissue can be affected by the disease, but in most cases mainly the lungs and mediastinal lymph nodes but also skin, heart, eyes and joints are involved, the latter are mainly the metacarpophalangeal joints and bone lesions are often associated with involvement of the overlying skin. The diagnosis is often of exclusion, based on clinical and radiological suspicion, and should be confirmed by biopsy, although in each case it is necessary to exclude other possible causes of granulomatosis, including infections by mycobacteria...
2016: Multidisciplinary Respiratory Medicine
https://www.readbyqxmd.com/read/27304615/patients-with-tuberculosis-have-a-dysfunctional-circulating-b-cell-compartment-which-normalizes-following-successful-treatment
#17
Simone A Joosten, Krista E van Meijgaarden, Franca Del Nonno, Andrea Baiocchini, Linda Petrone, Valentina Vanini, Hermelijn H Smits, Fabrizio Palmieri, Delia Goletti, Tom H M Ottenhoff
B-cells not only produce immunoglobulins and present antigens to T-cells, but also additional key roles in the immune system. Current knowledge on the role of B-cells in infections caused by intracellular bacteria is fragmentary and contradictory. We therefore analysed the phenotypical and functional properties of B-cells during infection and disease caused by Mycobacterium tuberculosis (Mtb), the bacillus causing tuberculosis (TB), and included individuals with latent TB infection (LTBI), active TB, individuals treated successfully for TB, and healthy controls...
June 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27301275/intracardiac-tuberculomas-caused-by-mycobacterium-tuberculosis-in-a-dog
#18
Olga Szaluś-Jordanow, Ewa Augustynowicz-Kopeć, Michał Czopowicz, Arkadiusz Olkowski, Andrzej Łobaczewski, Magdalena Rzewuska, Rafał Sapierzyński, Elżbieta Wiatr, Magdalena Garncarz, Tadeusz Frymus
BACKGROUND: This paper presents an unusual form of disseminated Mycobacterium tuberculosis infection in a dog. The infection lasted at least one year and its main gross lesions were massive cardiac tuberculomas. To the best of our knowledge, this is the first report of heart tuberculomas in a dog. CASE PRESENTATION: A 9-year-old mixed-breed male dog weighing 10 kg was referred to the clinic for cardiological evaluation before general anesthesia. The echocardiography revealed a lump of about 20 mm in diameter in the area of the left atrium...
June 14, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27235279/ala-pdt-combined-with-antibiotics-for-the-treatment-of-multiple-skin-abscesses-caused-by-mycobacterium-fortuitum
#19
Nanpeng Gong, Yang Tan, Min Li, Weiping Lu, Xia Lei
Atypical mycobacterial skin infection is rare in clinical practice. Because atypical mycobacteria are highly hydrophobic, the permeability of the outer membrane of the bacterial wall is very low, which makes it difficult for drugs to cross the barrier. Additionally, atypical mycobacteria are resistant to many drugs, and thus, infection tends to last for a long time and become recurrent and difficult to treat. Thus, it is very important to find new, more effective treatment methods. Mycobacterium fortuitum is a type of fast-growing atypical mycobacterium that is resistant to all of the primary anti-TB drugs and thus is very difficult to treat...
September 2016: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/27149138/generalized-pyoderma-gangrenosum-associated-with-ulcerative-colitis-successful-treatment-with-infliximab-and-azathioprine
#20
Foteini Chatzinasiou, Dimitrios Polymeros, Maro Panagiotou, Konstadinos Theodoropoulos, Dimitrios Rigopoulos
Pyoderma gangrenosum (PG) is a rare ulcerative skin disease, part of the spectrum of neutrophilic and auto-inflammatory dermatoses. Its pathogenesis is unknown, although immune pathways have been implicated. Lesion biopsies show a predominantly neutrophilic infiltrate. The incidence of PG is uncertain, but it is estimated to be 3-10 per million per year, occurring at any age but most commonly between 20 and 50 years with a possible slightly higher incidence in women. Approximately 50% of patients with PG also have another disease associated with PG...
April 2016: Acta Dermatovenerologica Croatica: ADC
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