Publications by authors named "Valliappan Muthu"

Background: Chronic pulmonary aspergillosis (CPA) is most commonly caused by Aspergillus fumigatus (AF-CPA). Serum A. fumigatus-IgG, a pivotal investigation for diagnosing CPA, misses 10%-15% of CPA cases.

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Background And Objective: Oxygen desaturation events occur commonly during Endobronchial endobronchial ultrasound (EBUS) guided-transbronchial needle aspiration (TBNA) performed under conscious sedation. We hypothesized that high-flow nasal cannula (HFNC) would be superior to conventional nasal cannula (NC) in preventing these hypoxemic episodes.

Methods: We randomized consecutive subjects ≥18 years undergoing EBUS-TBNA to receive oxygen with HFNC or NC.

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Background And Objective: Bronchoalveolar lavage lymphocyte percentage (BLP) is considered a prognostic marker for interstitial lung diseases (ILDs) other than idiopathic pulmonary fibrosis (IPF). Its association with an early glucocorticoid response (EGR) has not been studied systematically. We aimed to assess the association of BLP and other factors with EGR.

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Mannose-binding lectin (MBL) contributes to innate immunity against Aspergillus fumigatus. We assessed the role of reduced MBL levels in asthma patients with and without allergic bronchopulmonary aspergillosis (ABPA). In this prospective cross-sectional study, we enrolled 154 adults: 48 with asthma, 27 with Aspergillus-sensitized asthma (ASA, A.

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BackgroundSystemic lupus erythematosus (SLE) is associated with significant morbidity and mortality, particularly during hospitalisation. Differentiating between infection and disease activity is crucial but challenging. Regional variations in infection rates and disease manifestations necessitate region-specific studies.

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Background: The diagnostic cut-off values for IgG antibodies against recombinant Aspergillus fumigatus (rAsp) antigens in allergic bronchopulmonary aspergillosis (ABPA) remain unclear.

Objectives: To derive and validate diagnostic cut-offs for IgG antibodies against rAsp f 1, f 2 and f 4 in ABPA and assess their diagnostic performance in distinguishing ABPA from asthma.

Methods: In this case-control study, we prospectively enrolled consecutive subjects with asthma and ABPA.

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We describe a rare case of pulmonary infection by an emerging dimorphic fungus, Emergomyces pasteurianus in a 73-year-old renal transplant recipient from Northern India. The patient presented with fever and shortness of breath for ten days. The bronchoalveolar lavage revealed yeast cells and grew E.

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Background And Objective: Serum periostin and carcinoembryonic antigen (CEA) are markers of type 2 inflammation. However, their role in diagnosing and monitoring treatment responses in allergic bronchopulmonary aspergillosis (ABPA) remains uncertain. The objective of the study was to assess the diagnostic performance of serum CEA and periostin in distinguishing ABPA from asthma.

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Pulmonary alveolar proteinosis (PAP) is a rare lung condition characterized by the accumulation of proteinaceous material within the alveoli. The acquired form is often autoimmune, driven by autoantibodies against granulocyte-macrophage colony-stimulating factor. Presentation of autoimmune PAP may range from incidental detection in asymptomatic patients to advanced respiratory failure.

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Introduction: Allergic bronchopulmonary aspergillosis (ABPA) is a lung disorder that arises in individuals with asthma or cystic fibrosis due to an exaggerated immune response to . It leads to mucus plugging, recurrent exacerbations, and progressive bronchiectasis. Despite established diagnostic criteria, ABPA remains underdiagnosed, primarily due to its overlap with severe asthma and limited clinical awareness.

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Introduction: The currently available diagnostic tests lack sensitivity to diagnose pulmonary cryptococcosis. In the current study, we developed and standardized an in-house real-time PCR assay and evaluated the antigen detection in respiratory samples for the diagnosis of pulmonary cryptococcosis.

Materials And Methods: We standardized an in-house real-time PCR assay (using URA5 and STR1 primers; index test 1) and cryptococcal antigen detection (BIOSYNEX® CryptoPS, France) from the respiratory samples (index test 2).

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Background: Post-mycobacterial residual lung abnormality (PMLA) from prior tuberculous (PTLA) or non-tuberculous mycobacterial (PNTLA) lung infections predisposes to chronic pulmonary aspergillosis (CPA). However, the prevalence of CPA in patients with PMLA remains uncertain. We aimed to determine the prevalence of CPA in patients with PMLA.

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Background: Mucorales polymerase chain reaction (PCR) is used to diagnose pulmonary mucormycosis (PM) among neutropenic individuals. However, data on the utility of PCR in patients with diabetes mellitus, another major risk factor for PM, are limited.

Objective: The primary objective was to assess the diagnostic performance of a commercial real-time PCR assay (MucorGenius) in plasma and bronchoalveolar lavage fluid (BALF) for diagnosing PM (proven and probable cases only) in patients with suspected invasive mould disease (IMD).

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Background: The impact of bronchiectasis severity on the outcomes of patients with allergic bronchopulmonary aspergillosis (ABPA) remains uncertain.

Objective: To evaluate whether bronchiectasis severity is associated with an increased risk of ABPA exacerbations.

Methods: We retrospectively analyzed patients with ABPA between 2007 and 2019.

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Background: LDBio immunochromatographic lateral flow assay, a point-of care test, detects IgM/IgG antibodies against Aspergillus fumigatus (LDBio-ALFA). LDBio-ALFA has been evaluated for diagnosing chronic pulmonary aspergillosis (CPA) in hospital patients, though its efficacy in field settings remains unexamined.

Objective: Our primary objective was to assess the diagnostic accuracy of LDBio-ALFA in diagnosing CPA in a field and a hospital cohort.

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Background: The risk factors for interstitial lung disease (ILD) in rheumatoid arthritis (RA) are inconsistent among previous studies. Furthermore, the factors associated with the emergence of the recently defined progressive fibrosing (PF) phenotype are unknown. Herein, we analyze the risk factors for ILD in RA.

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Mucormycosis is an emerging, life-threatening human infection caused by fungi of the order Mucorales. Metabolic disorders uniquely predispose an ever-expanding group of patients to mucormycosis via poorly understood mechanisms. Therefore, it is highly likely that uncharacterized host metabolic effectors confer protective immunity against mucormycosis.

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Article Synopsis
  • The study compares various screening methods for allergic bronchopulmonary aspergillosis (ABPA) in asthma patients to find the most effective approach.
  • Serum IgE testing emerged as the best option, being the most cost-effective while providing high diagnostic accuracy.
  • Other methods, like total IgE and imaging, were more expensive and either missed cases or required many additional tests.
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