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atypical mycobacteria

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https://www.readbyqxmd.com/read/28932687/multifocal-ulceronecrotic-skin-lesions-a-stigmatizing-case
#1
Fanny-Emmanuelle Bernier, Simon Grandjean Lapierre, Arwa El-Housseini, Mélissa Nantel-Battista, Sapha Barkati
Mycobacterium chelonae is a rapidly growing nontuberculous mycobacteria, ubiquitous in the environment and mostly involved in skin, soft tissue and bone infections. An atypical, severe and multifocal dermatological manifestation of Mycobacterium chelonae infection in an immunocompetent patient is described here. The lesions completely resolved using a multidisciplinary approach. This case emphasizes the important aspects of diagnosis, antimicrobial and surgical management.
2017: IDCases
https://www.readbyqxmd.com/read/28928258/implantable-cardiac-defibrillator-infections-the-emerging-importance-of-mycobacterium-fortuitum
#2
Menfil Orellana-Barrios, David A Sotello Aviles, Olusegun Oyenuga, Kenneth Nugent
Infection is a clinically relevant complication associated with intracardiac devices. Atypical mycobacteria, particularly Mycobacterium fortuitum, have been increasingly implicated in cardiovascular implantable electronic device (CIED) infections. We present a case of M. fortuitum CIED infection in a patient with ischaemic cardiomyopathy occurring approximately 3 weeks after insertion. The recognition and adequate treatment, including device removal, tissue sampling and the determination of antimicrobial sensitivities, are essential in the proper management of these patients...
September 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28815004/hypersensitivity-pneumonitis-among-wind-musicians-an-overlooked-disease
#3
Janne Møller, Charlotte Hyldgaard, Sissel Brix Kronborg-White, Finn Rasmussen, Elisabeth Bendstrup
Hypersensitivity pneumonitis (HP) is a complex pulmonary disorder mediated by the immune system and caused by various inhaled antigens against which the subject has previously been sensitized. In about 50% of the cases, the antigen is not identified. Identification and removal of the eliciting antigen is important for the prognosis. We report two cases of HP caused by molds and atypical mycobacteria isolated from wind instruments. We present the first case of HP caused by bassoon playing and another case of HP caused by molds in a trombone...
2017: European Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28696635/-how-to-handle-a-non-resolving-pneumonia
#4
Benoit Lechartier, Maura Prella, Oriol Manuel, Laurent P Nicod
Persistent pneumonias are frequent both in hospital and primary care settings. Several parameters have to be taken into account. Firstly the appropriateness of treatment; secondly the immune status of the host; and finally infectious complications need to be ruled out. Several non-infectious diagnoses can mimic a persistent infiltrate, such as neoplastic disorders, organising pneumonias, interstitial disorders and drug - or radiation-induced lung diseases. Uncommon pathogens will not respond to common treatment, for instance atypical bacteria, mycobacteria, fungi including Pneumocystis as well as viruses...
November 16, 2016: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28619159/original-mycobacterial-sin-a-consequence-of-highly-homologous-antigens
#5
REVIEW
A O Jenkins, A Michel, V Rutten
The role of antigens shared between Mycobacteria in in-vivo cross-reactive immune responses in host animals, have been reported to be responsible for reduced BCG vaccination efficacy as well reduced specificity of routine immunological diagnostic tests. This presents with significant disease control challenges in humans and animals. The present review highlights the results of previous studies on the effect of pre-sensitization to environmental mycobacteria on either pathogenic mycobacteria and/or M. bovis BCG, in experimental animals...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28591314/complete-plasmid-sequence-carrying-type-iv-like-and-type-vii-secretion-systems-from-an-atypical-mycobacteria-strain
#6
Sergio Mascarenhas Morgado, Michel Abanto Marín, Fernanda S Freitas, Erica Lourenço Fonseca, Ana Carolina Paulo Vicente
The genus Mycobacterium is highly diverse and ubiquitous in nature, comprehending fast- and slow-growing species with distinct impact in public health. The plasmid-mediated horizontal gene transfer represents one of the major events in bacteria evolution. Here, we report the complete sequence of a 160,489 bp circular plasmid (pCBMA213_2) from an atypical and fast-growing environmental mycobacteria. This is a unique plasmid, in comparison with the characterised mycobacteria plasmids, harboring a type IV-like and ESX-P2 type VII secretion systems...
July 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28541806/atypical-wound-pathogens
#7
Philip S Barie
BACKGROUND: Atypical wound pathogens may be so described because they are uncommon pathogens of soft tissue among human beings, or because they may be fastidious and difficult to recover/isolate in the laboratory. METHODS: A review of pertinent English-language literature was performed. RESULTS: These wound pathogens are a diverse lot, including aerobic and anaerobic gram-positive and gram-negative bacilli, non-tuberculous mycobacteria, and bacteria that cannot be characterized conventionally because they lack a cell wall (the Mycoplasmataceae)...
May 2017: Surgical Infections
https://www.readbyqxmd.com/read/28505602/unusual-antigen-presentation-offers-new-insight-into-hiv-vaccine-design
#8
REVIEW
Andrew J McMichael, Louis J Picker
Recent findings with a rhesus monkey cytomegalovirus based simian immunodeficiency virus vaccine have identified strong CD8+ T cell responses that are restricted by MHC-E. Also mycobacteria specific CD8+ T cells, that are MHC-E restricted, have been identified. MHC-E therefore can present a wide range of epitope peptides to CD8+ T cells, alongside its well defined role in presenting a conserved MHC-class I signal peptide to the NKG2A/C-CD94 receptor on natural killer cells. Here we explore the antigen processing pathways involved in these atypical T cell responses...
June 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28496303/development-of-a-potent-invigorator-of-immune-responses-endowed-with-both-preventive-and-therapeutic-properties
#9
REVIEW
Gursaran P Talwar, Jagdish C Gupta, Abu S Mustafa, Hemanta K Kar, Kiran Katoch, Shreemanta K Parida, Prabhakara P Reddi, Niyaz Ahmed, Vikram Saini, Somesh Gupta
This article reviews briefly the making of an immunoprophylactic-cum-immunotherapeutic vaccine against leprosy. The vaccine is based on cultivable, heat-killed atypical mycobacteria, whose gene sequence is now known. It has been named Mycobacterium indicus pranii. It has received the approval of the Drug Controller General of India and the US Food and Drug Administration. Besides leprosy, M. indicus pranii has found utility in the treatment of category II ("difficult to treat") tuberculosis. It also heals ugly anogenital warts...
2017: Biologics: Targets & Therapy
https://www.readbyqxmd.com/read/28487789/abdominopelvic-tuberculosis-with-a-frozen-section-analysis-consistent-with-ovarian-cancer
#10
Agrimaldo Martins-Filho, Paula Carolina Arvelos Crispim, Renata Margarida Etchebehere, Cristina da Cunha Hueb Barata de Oliveira, Eddie Fernando Candido Murta, Rosekeila Simões Nomelini
Pelvic tuberculosis is a type of extrapulmonary tuberculosis. The disease is accompanied by clinical and laboratory findings which may be unspecific and present aspects of other diseases, including gynecological malignancies. In this report, the authors presented a case of pelvic tuberculosis associated with peritoneal tuberculosis in a young woman exhibiting imaging and tumor markers consistent with ovarian neoplasm. An intraoperative frozen section analysis detected atypical cells that were suggestive of ovarian borderline or malignant epithelial neoplasia...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28442758/an-amidase_3-domain-containing-n-acetylmuramyl-l-alanine-amidase-is-required-for-mycobacterial-cell-division
#11
Sibusiso Senzani, Dong Li, Ashima Bhaskar, Christopher Ealand, James Chang, Binayak Rimal, Chengyin Liu, Sung Joon Kim, Neeraj Dhar, Bavesh Kana
Mycobacteria possess a multi-layered cell wall that requires extensive remodelling during cell division. We investigated the role of an amidase_3 domain-containing N-acetylmuramyl-L-alanine amidase, a peptidoglycan remodelling enzyme implicated in cell division. We demonstrated that deletion of MSMEG_6281 (Ami1) in Mycobacterium smegmatis resulted in the formation of cellular chains, illustrative of cells that were unable to complete division. Suprisingly, viability in the Δami1 mutant was maintained through atypical lateral branching, the products of which proceeded to form viable daughter cells...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28438129/severe-type-1-upgrading-leprosy-reaction-in-a-renal-transplant-recipient-a-paradoxical-manifestation-associated-with-deficiency-of-antigen-specific-regulatory-t-cells
#12
Ana Paula Vieira, Maria Angela Bianconcini Trindade, Flávio Jota de Paula, Neusa Yurico Sakai-Valente, Alberto José da Silva Duarte, Francine Brambate Carvalhinho Lemos, Gil Benard
BACKGROUND: Due to its chronic subclinical course and large spectrum of manifestations, leprosy often represents a diagnostic challenge. Even with proper anti-mycobacteria treatment, leprosy follow up remains challenging: almost half of leprosy patients may develop reaction episodes. Leprosy is an infrequent complication of solid organ transplant recipients. This case report illustrates the challenges in diagnosing and managing leprosy and its reactional states in a transplant recipient...
April 24, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28367029/biofilm-colonization-in-chronic-treatment-refractory-infections-presenting-with-discharging-sinuses-a-study-in-a-tertiary-care-hospital-of-eastern-india
#13
Asmita De, Hirak Jyoti Raj, Jayeeta Haldar, Poulami Mukherjee, Prasanta Kumar Maiti
INTRODUCTION: Treatment refractory chronic recurrent infections mean those chronic infections which recur by same causal agents with similar drug responsiveness after apparent relief following full course of recommended antimicrobial management. MATERIALS AND METHODS: Fifty different samples were collected from patients with chronic surgical site infections, laparoscopic port site infections, anal fistula, mesh hernioplasty, chronic dacryocystitis, chronic osteomyelitis, and chronic burn wounds...
April 2017: Journal of Laboratory Physicians
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
#14
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
#15
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...
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
#16
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
#17
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
#18
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
#19
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
#20
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
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