Publications by authors named "Sanjay Bhattacharya"

Article Synopsis
  • - This study examines how COVID-19 affects cancer patients' risk of death within 30 days of hospitalization, finding that specific types of cancer significantly elevate this risk.
  • - Among 51,544 hospitalized COVID-19 patients, 976 had cancer; solid cancers had a particularly high mortality rate of 25%.
  • - The research emphasizes the importance of tailored monitoring and treatment for COVID-19 patients with cancer, especially during the first 10 days of hospitalization, as this is when the risk of severe outcomes is greatest.
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Environmental cleaning is essential to patient and health worker safety, yet it is a substantially neglected area in terms of knowledge, practice, and capacity-building, especially in resource-limited settings. Public health advocacy, research and investment are urgently needed to develop and implement cost-effective interventions to improve environmental cleanliness and, thus, overall healthcare quality and safety. We outline here the CLEAN Group Consensus exercise yielding twelve urgent research questions, grouped into four thematic areas: standards, system strengthening, behaviour change, and innovation.

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Background: Determining regional patterns of antimicrobial resistance in bacterial infections in the healthcare setting (AMR) identifies surveillance gaps and informs policies for mitigation. We estimated the prevalence of AMR for six WHO priority pathogens in diagnostic and surveillance samples in the twelve east and north-east Indian states from 2011 to 2022 (PROSPERO ID: CRD42021278961).

Methods: Studies were searched on Medline, Scopus, and Web of Science.

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  • The study investigates the prevalence and impact of candidaemia in 67 ICUs across India, assessing how the COVID-19 pandemic influenced its rates and mortality.* -
  • Data from 401,601 patient days revealed higher candidaemia rates in COVID-19 ICUs (2.52/1000 patient days) compared to non-COVID-19 ICUs (1.05/1000 patient days), with associated mortality significantly higher in COVID-19 cases (61% vs. 41%).* -
  • Analysis identified C. tropicalis as the most common isolated species (26.7%), while C. auris, which had a high mortality rate, accounted for 17.5% of isolates
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Background: Ventilator-associated pneumonia (VAP) is a major cause of morbidity and mortality in patients receiving mechanical ventilation in India. Surveillance of VAP is essential to implement data-based preventive measures. Implementation of ventilator-associated events (VAE) criteria for surveillance has major constraints for low resource settings, which can lead to significant underreporting.

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Aims: The use of metagenomics for pathogen identification in clinical practice has been limited. Here we describe a workflow to encourage the clinical utility and potential of NGS for the screening of bacteria, fungi, and antimicrobial resistance genes (ARGs).

Methods And Results: The method includes target enrichment, long-read sequencing, and automated bioinformatics.

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Background: Research is essential for the advancement of science, technology and development. Research requires funding and resource allocation. And funding requires the ability to write research grant application.

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Article Synopsis
  • Cyclospora cayetanensis is a parasite that causes severe gastroenteric disease, but cases in India are not well-studied, and none have been reported from eastern India until now.
  • A 30-year-old Bengali woman with no travel history experienced over two months of foul-smelling diarrhea that did not respond to multiple antibiotics, ruling out other common pathogens.
  • The diagnosis of C. cayetanensis was confirmed through DNA testing, and she was successfully treated with antibiotics, highlighting the need for increased awareness of this infection in India.
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This study represents an experimental investigation, complemented with a mathematical model, to decipher the effect of gravity on the spreading dynamics of a water droplet. For the theoretical discussion, an overall energy balance approach is adopted to explain the droplet spreading under both microgravity (μg) and terrestrial gravity condition. Besides explaining the mechanism of the droplet spreading under microgravity condition achieved during the parabolic flight, a technique with a detailed experimental set-up has also been developed for the successful deposition of droplet.

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Background: Infections by multidrug-resistant organisms (MDRO) are a major hurdle in hematopoietic stem-cell transplants (HSCTs). Conditioning regimens lead to mucosal barrier injury, which in-turn leads to transmigration of gut bacteria and sepsis. Pre-transplant stool and throat surveillance cultures can guide empirical antibiotic policy during the neutropenic period.

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Background: Trend analysis of bacteraemias caused by multi-drug resistant (MDR) and extensively drug resistant (XDR) bacteria helps to assess efficacy of infection prevention and control (IPC) practices. Data on the trends of MDR and XDR bacteraemias are lacking from cancer patients in India.

Aims: To report antibiotic resistance rates over time in bacteraemias and to assess the effect of IPC practices where patient isolation facilities were limited on the rates and trends of MDR and XDR bacteraemias from a cancer centre in eastern India.

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In recent times, discovery efforts for novel antibiotics have mostly targeted carbapenemase-producing Gram-negative organisms. Two different combination approaches are pertinent: β-lactam-β-lactamase inhibitor (BL/BLI) or β-lactam-β-lactam enhancer (BL/BLE). Cefepime combined with a BLI, taniborbactam, or with a BLE, zidebactam, has been shown to be promising.

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Purpose: Despite COVID vaccination with ChAdOx1 ncov-19 (COVISHIELD®) (ChAdOx1 ncov-19) a large number of healthcare workers (HCWs) were getting infected in wave-2 of the pandemic in a cancer hospital of India. It was important therefore to determine the genotypes responsible for vaccine breakthrough infections.

Methods & Objectives: Retrospective observational study of HCWs.

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Background: Health-care-associated infections (HAIs) cause significant morbidity and mortality globally, including in low-income and middle-income countries (LMICs). Networks of hospitals implementing standardised HAI surveillance can provide valuable data on HAI burden, and identify and monitor HAI prevention gaps. Hospitals in many LMICs use HAI case definitions developed for higher-resourced settings, which require human resources and laboratory and imaging tests that are often not available.

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Article Synopsis
  • Healthcare-associated infections (HAIs) are a significant issue in patient care, causing considerable illness and death; this study assesses current infection prevention practices in Indian hospitals involved in a national HAI surveillance network.
  • A survey conducted from October 2015 to September 2018 across 23 Indian hospitals used the WHO IPC assessment tool to evaluate infection control strategies and analyzed the data statistically.
  • Results showed that average scores for key infection prevention activities were below 50%, indicating a need for enhancements in human resources, HAI surveillance, and monitoring/evaluation practices.
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Pythiosis, caused by Pythium insidiosum (a fungal-like stramenipila, a group of eukaryotes away from the true fungi). Pythium insidiosum causes rare human and animal infections. Transmission from animals to human is yet to be reported.

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The prevailing corona virus disease 19 (COVID-19) pandemic has adversely affected the healthcare services globally. Hematopoietic cell transplantation (HCT) is considered as the preferred treatment option for several hematological malignancies, and HPC collection facilities have to function continuously along with implementing safety measures. Based on the national and international guidelines, we implemented additional measures and modifications to our standard operating procedure (SOP) to ensure secure HPC collection from patients as well as donors.

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Echinocandins are frontline antifungal agents in the management of invasive infections due to multidrug resistant Candida auris. The study aimed to evaluate echinocandin resistance in C. auris isolates of multicentric origin, identify the resistance mechanism, and analyze the pharmacodynamic response to caspofungin in a neutropenic mouse model of infection.

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Article Synopsis
  • PAS (Platelet Additive Solution) helps lower allergic reactions and delayed hemolytic transfusion reactions (DHTR) in patients receiving platelet transfusions.
  • A study compared the quality of PAS-stored platelets with traditional plasma-stored platelets, measuring factors like glucose and LDH levels, but found similar overall quality between the two methods.
  • The study concluded that PAS-stored platelets are effective for patients with allergic reactions and those requiring minor ABO incompatible transfusions, making it a suitable alternative for multi-transfused patients.
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Components of blood products from Blood bank, stem cells products from Haemotapoietic Stem Cell Transplant unit, CSSD (Central Sterile Supply Department) items, and pharrrmaceutical products, were sterility tested by liquid culture. 2.91% of the total 3122 samples sent for sterility testing from various departments were positive (i.

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Purpose: Quantitative real-time polymerase chain reactions (qPCRs) are important for accurate detection of nucleic acid target including that for viral load determination. Assessment of the quality of a PCR run is essential for quality control, diagnostics and research. In order to reduce subjectivity qPCR standard curves are accompanied with parametric values for slope, Y- intercept, correlation coefficient (R) and PCR efficiency.

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Article Synopsis
  • Healthcare associated infections (HAIs) are common and hard to manage, but many can be prevented through good Infection Prevention and Control (IPC) practices.
  • A study evaluated IPC practices in 32 Indian hospitals using the WHO’s self-assessment tool, revealing varying levels of IPC implementation: 13% had basic practices, 28% had intermediate, and 59% had advanced practices.
  • The findings highlight the need for quality improvement training for IPC nurses and healthcare professionals to enhance infection control efforts in these facilities.
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A good point-of-care diagnostic test holds a promise to reduce inappropriate use of antibiotics by enabling early detection of the pathogen and facilitating rapid testing of antimicrobial susceptibility. India has taken many initiatives in the recent past to augment the development and deployment of diagnostics in Indian health care system. Funding opportunities to promote innovation in diagnostics development were started in early 2000s through various ministries and departments.

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