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Pulmonary Nocardia ignorata Infection in Gardener, Iran, 2017.

ABSTRACT: Nocardia ignorata, which was first described in 2001, is a rare human pathogen. We report a case of pulmonary nocardiosis caused by this bacterium in a 55-year-old man from Iran. The patient, a gardener, had frequent exposure to soil and may have acquired the infection from that source.

SUBMITTER: Rahdar HA

PROVIDER: S-EPMC7045840 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Pulmonary Nocardia ignorata Infection in Gardener, Iran, 2017.

Rahdar Hossein A HA Gharabaghi Mehrnaz A MA Bahador Abbas A Shahraki-Zahedani Shahram S Karami-Zarandi Morteza M Mahmoudi Shahram S Feizabadi Mohammad M MM

Emerging infectious diseases 20200301 3

Nocardia ignorata, which was first described in 2001, is a rare human pathogen. We report a case of pulmonary nocardiosis caused by this bacterium in a 55-year-old man from Iran. The patient, a gardener, had frequent exposure to soil and may have acquired the infection from that source. ...[more]

PMID: 32091362

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First case report of pulmonary and cutaneous nocardiosis caused by Nocardia mexicana in Iran.

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A fatal case of Nocardia otitidiscaviarum pulmonary infection and brain abscess: taxonomic characterization by molecular techniques.

Project description:We report on a rare case of pulmonary Nocardiosis and brain abscess caused by Nocardia otitidiscaviarum in an elderly woman with chronic obstructive pulmonary disease. Taxonomic identification involved phenotypic testing, restriction fragment length polymorphism (RFLP), and complete 16S rRNA gene sequencing.

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Mixed Infection of Cytomegalovirus and Pulmonary Nocardiosis Caused by Nocardia elegans Diagnosed Using Nanopore Sequencing Technology.

Project description:A 69-year-old woman who had undergone renal transplantation and was receiving sulfamethoxazole/trimethoprim (ST) developed pulmonary nocardiosis. To our knowledge, this is the first report of the identification of Nocardia elegans using nanopore sequencing, supported by 16S rDNA capillary sequencing findings. Chest computed tomography performed after ST initiation revealed significant improvement of the pulmonary shadows compared to previous findings. We herein report the value of nanopore sequencing for rapid identification of rare pathogens, such as Nocardia elegans. Furthermore, our findings suggest that Nocardia may infect even patients receiving ST, which is currently the most effective prophylactic drug.

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Nocardia thailandica Pulmonary Nocardiosis in a Post-Solid Organ Transplant Patient.

Project description:Nocardia thailandica is a rare pathogen related to Nocardia asteroides, Nocardia neocaledoniensis, and Nocardia caishijiensis that, since its original description in 2004, has only been reported to cause wound and ocular infections in humans. We report a case of pulmonary nocardiosis caused by Nocardia thailandica in a 66-year-old solid organ transplant patient from Connecticut, which was identified at the molecular taxonomic level by secA1 analysis, 16S rRNA gene sequencing, and matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS). To our knowledge, this is the first reported case of N. thailandica in the United States and the first report of pulmonary infection by this pathogen in the literature.

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Project description:Pulmonary infections are the most common clinical manifestations of Nocardia species. There is an increase in cases of nocardial infections occurring worldwide attributable to the increase in the immunosuppressed population. The availability of molecular methods has aided the detection of more number of cases as well as unusual species. Still, it remains one of the most underdiagnosed pathogens. Recognition of drug resistance in this organism has now mandated early and precise identification with speciation for effective treatment and management. Nocardial species identity can predict antimicrobial susceptibility and guide clinical management. Here, we report two cases of pulmonary nocardiosis caused by unusual species of Nocardia, namely, N. cyriacigeorgica and N. beijingensis identified by 16S rRNA gene-based sequencing. These cases are being reported for their rarity.

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First case report of pulmonary nocardiosis caused by Nocardia mexicana.

Project description:IntroductionNocardia species usually cause opportunistic infections, and the frequency of these infections is increasing owing to the growing population of immunocompromised hosts. However, Nocardia species may sometimes cause an infection disease in immunocompetent hosts. Nocardia mexicana infections are the least common and are very rare.Case presentationHerein, we report the first case of a pulmonary infection with N. mexicana in a 61-year-old Japanese woman with a history of hyperlipidaemia and bronchiectasis and a 6-month history of non-productive hacking cough. A sample of bronchial lavage fluid obtained by bronchofiberscopy showed filamentous branching gram-positive rods and acid-fast filamentous branching rods, and a colony of suspected Nocardia was cultured. Based on 16S rRNA, gyrB,rpoB, secA1 and hsp65 gene sequence analyses and biochemical and physiological properties, the strain was identified as N. mexicana. The strain was resistant to the antimicrobial agents amoxicillin-clavulanic acid, clarithromycin, minocycline, gentamycin, tobramycin, ciprofloxacin and trimethoprim-sulfamethoxazole. The patient was treated with biapenem followed by intravenous amikacin and oral linezolid.ConclusionDespite its rarity, the species require attention owing to the existence of multidrug-resistant strains.

| S-EPMC5330244 | biostudies-literature

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