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      Pulmonary Nocardiosis and Scrub Typhus in an Immunocompromised Host

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          Abstract

          Pulmonary infections are not uncommon in patients with an underlying immunocompromised condition. Unusual combination of microorganisms causing concomitant infections among these patients has also been reported. However, certain rare dual occurrences are usually unanticipated as in the case we present here. This case highlights the importance of being aware of the possible coexistence of infections in immunocompromised patients. To the best of our knowledge, this is the first report of coinfection with Nocardia otitidiscaviarum and Orientia tsutsugamushi in a critically ill immunocompromised patient from South India.

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          Most cited references21

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          Nocardiosis: updates and clinical overview.

          Nocardia, a gram-positive bacillus with the microscopic appearance of branching hyphae, can produce considerable disease in the appropriate host. The taxonomy of Nocardia continues to evolve; more than 50 species have been described. Early recognition and effective therapy are imperative to achieve successful outcomes. Although nocardiosis typically occurs in patients with cell-mediated immunosuppressive conditions, infection may occasionally develop in immunocompetent patients as well. This review addresses the microbiology of Nocardia, risk factors for infection, clinical presentations, and management strategies. Copyright © 2012 Mayo Foundation for Medical Education and Research. Published by Elsevier Inc. All rights reserved.
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            Antimicrobial-resistant nocardia isolates, United States, 1995-2004.

            We conducted a 10-year retrospective evaluation of the epidemiology and identification of Nocardia isolates submitted to the Centers for Disease Control and Prevention for antimicrobial susceptibility testing. The species most commonly identified were N. nova (28%), N. brasiliensis (14%), and N. farcinica (14%). Of 765 isolates submitted, 61% were resistant to sulfamethoxazole and 42% were resistant to trimethoprim-sulfamethoxazole.
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              Scrub typhus

              Scrub typhus is an acute febrile illness caused by orientia tsutsugamushi, transmitted to humans by the bite of the larva of trombiculid mites. It causes a disseminated vasculitic and perivascular inflammatory lesions resulting in significant vascular leakage and end-organ injury. It affects people of all ages and even though scrub typhus in pregnancy is uncommon, it is associated with increased foetal loss, preterm delivery, and small for gestational age infants. After an incubation period of 6-21 days, onset is characterized by fever, headache, myalgia, cough, and gastrointestinal symptoms. A primary papular lesion which later crusts to form a flat black eschar, may be present. If untreated, serious complications may occur involving various organs. Laboratory studies usually reveal leukopenia, thrombocytopenia, deranged hepatic and renal function, proteinuria and reticulonodular infiltrate. Owing to the potential for severe complications, diagnosis, and decision to initiate treatment should be based on clinical suspicion and confirmed by serologic tests. A therapeutic trial of tetracycline or chloramphenicol is indicated in patients in whom the diagnosis of scrub typhus is suspected. The recommended treatment regimen for scrub typhus is doxycycline. Alternative regimens include tetracycline, chloramphenicol, azithromycin, ciprofloxacin, rifampicin, and roxithromycin. Treatment of pregnant women with azithromycin was successfully done without relapse and with favorable pregnancy outcomes. Hence, early diagnosis and treatment are essential in order to reduce the mortality and the complications associated with the disease. We searched the English-language literature for reports of scrub typhus in children, pregnant women, and non-pregnant patients with scrub typhus, using the MEDLINE/PubMed database, which includes citations from 1945 to the present time. We used the search terms ‘scrub typhus’, ‘scrub typhus’ and ‘pregnancy’, ‘scrub typhus’ and ‘children’, ‘scrub typhus’ and ‘complications’, ‘scrub typhus’ and ‘treatment’.
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                Author and article information

                Journal
                J Glob Infect Dis
                J Glob Infect Dis
                JGID
                Journal of Global Infectious Diseases
                Medknow Publications & Media Pvt Ltd (India )
                0974-777X
                0974-8245
                Apr-Jun 2018
                : 10
                : 2
                : 108-111
                Affiliations
                [1]Department of Microbiology, Apollo Speciality Hospitals, Vanagaram, Chennai, Tamil Nadu, India
                [1 ]Department of Critical Care Medicine, Apollo Speciality Hospitals, Vanagaram, Chennai, Tamil Nadu, India
                [2 ]Department of Critical Care Medicine, Apollo Hospitals, Greams Road, Chennai, Tamil Nadu, India
                [3 ]Department of Microbiology, Apollo Hospitals, Greams Road, Chennai, Tamil Nadu, India
                Author notes
                Address for correspondence: Dr. Isabella Princess, Apollo Speciality Hospitals, Vanagaram, Chennai, Tamil Nadu, India. E-mail: drisabella_p@ 123456apollohospitals.com
                Article
                JGID-10-108
                10.4103/jgid.jgid_105_17
                5987364
                29910572
                908d18f2-74e1-42e4-ab2a-799068397fc3
                Copyright: © 2018 Journal of Global Infectious Diseases

                This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.

                History
                Categories
                Case Report

                Infectious disease & Microbiology
                coinfection,immunocompromised,nocardia otitidiscaviarum,nocardiosis,scrub typhus

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