Chiagozie I. Pickens

ORCID: 0000-0002-3400-9228
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About
Contact & Profiles
Research Areas
  • Pneumonia and Respiratory Infections
  • Nosocomial Infections in ICU
  • Respiratory viral infections research
  • Bacterial Identification and Susceptibility Testing
  • Antibiotic Resistance in Bacteria
  • Antibiotic Use and Resistance
  • Antimicrobial Resistance in Staphylococcus
  • Clostridium difficile and Clostridium perfringens research
  • COVID-19 Clinical Research Studies
  • Sepsis Diagnosis and Treatment
  • Pneumocystis jirovecii pneumonia detection and treatment
  • Emergency and Acute Care Studies
  • Antifungal resistance and susceptibility
  • COVID-19 diagnosis using AI
  • Neutropenia and Cancer Infections
  • Gut microbiota and health
  • Long-Term Effects of COVID-19
  • Tuberculosis Research and Epidemiology
  • SARS-CoV-2 and COVID-19 Research
  • Respiratory Support and Mechanisms
  • Respiratory and Cough-Related Research
  • Antibiotics Pharmacokinetics and Efficacy
  • Streptococcal Infections and Treatments
  • Inhalation and Respiratory Drug Delivery
  • Nursing Roles and Practices

Northwestern University
2019-2025

La Jolla Alcohol Research
2023

Parks Victoria
2023

Nephrologisches Zentrum Goettingen
2023

RELX Group (United States)
2023

Hamilton Health Sciences
2023

Footscray Hospital
2023

Dialyse Centrum Groningen
2023

Cooperative Trials Group for Neuro-Oncology
2023

Saskatoon Medical Imaging
2023

Rogan A. Grant Luisa Morales‐Nebreda Nikolay S. Markov Suchitra Swaminathan Melissa Querrey and 95 more Estefany Rios-Guzman Darryl A. Abbott Helen K. Donnelly Alvaro Donayre Isaac A. Goldberg Zasu M. Klug Nicole Borkowski Ziyan Lu Hermon Kihshen Yuliya Politanska Lango Sichizya Mengjia Kang Ali Shilatifard Chao Qi Jon W. Lomasney A. Christine Argento Jacqueline M. Kruser Elizabeth S. Malsin Chiagozie I. Pickens Sean B. Smith James M. Walter Anna Pawlowski Daniel Schneider Prasanth Nannapaneni Hiam Abdala‐Valencia Ankit Bharat Cara J. Gottardi G. R. Scott Budinger Alexander V. Misharin Benjamin D. Singer Richard G. Wunderink Rogan A. Grant Luisa Morales‐Nebreda Nikolay S. Markov Suchitra Swaminathan Melissa Querrey Estefany Rios-Guzman Darryl A. Abbott Helen K. Donnelly Alvaro Donayre Isaac A. Goldberg Zasu M. Klug Nicole Borkowski Ziyan Lu Hermon Kihshen Yuliya Politanska Lango Sichizya Mengjia Kang Ali Shilatifard Chao Qi Jon W. Lomasney A. Christine Argento Jacqueline M. Kruser Elizabeth S. Malsin Chiagozie I. Pickens Sean B. Smith James M. Walter Anna Pawlowski Daniel Schneider Prasanth Nannapaneni Hiam Abdala‐Valencia Ankit Bharat Cara J. Gottardi G. R. Scott Budinger Alexander V. Misharin Benjamin D. Singer Richard G. Wunderink Ajay A. Wagh Alan R. Hauser Alexis Rose Wolfe Anjali Thakrar Anjana V. Yeldandi Ann A. Wang Anne R. Levenson Anthony M. Joudi Betty T. Tran Catherine A. Gao Chitaru Kurihara Clara Schroedl Curt M. Horvath Daniel Meza David D. Odell David W. Kamp Deborah R. Winter Egon A. Ozer Elisheva D. Shanes Elizabeth T. Bartom Emily J. Rendleman Emily M. Leibenguth Firas Wehbe Gabrielle Y. Liu Gaurav Gadhvi Heliodoro Tejedor Navarro Jacob I. Sznajder Jane E. Dematte

10.1038/s41586-020-03148-w article EN other-oa Nature 2021-01-11

Rationale: Current guidelines recommend patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pneumonia receive empirical antibiotics for suspected bacterial superinfection on the basis of weak evidence. Rates ventilator-associated (VAP) in clinical trials SARS-CoV-2 are unexpectedly low. Objectives: We conducted an observational single-center study to determine prevalence and etiology at time initial intubation incidence subsequent VAP pneumonia. Methods: Bronchoscopic...

10.1164/rccm.202106-1354oc article EN cc-by-nc-nd American Journal of Respiratory and Critical Care Medicine 2021-08-19

BACKGROUNDDespite guidelines promoting the prevention and aggressive treatment of ventilator-associated pneumonia (VAP), importance VAP as a driver outcomes in mechanically ventilated patients, including patients with severe COVID-19, remains unclear. We aimed to determine contribution unsuccessful mortality for pneumonia.METHODSWe performed single-center, prospective cohort study 585 respiratory failure, 190 whom had who underwent at least 1 bronchoalveolar lavage. A panel intensive care...

10.1172/jci170682 article EN cc-by Journal of Clinical Investigation 2023-04-27

Abstract Background Clinical end points that constitute successful treatment in severe pneumonia are difficult to ascertain and vulnerable bias. The utility of a protocolized adjudication procedure determine meaningful has not been well described. Methods This was single-center prospective cohort study patients with admitted the medical intensive care unit. objective develop an protocol for bacterial and/or viral pneumonia. Each episode independently reviewed by 2 pulmonary critical...

10.1093/ofid/ofad336 article EN cc-by-nc-nd Open Forum Infectious Diseases 2023-07-01
Nikolay S. Markov Ziyou Ren Karolina J. Senkow Rogan A. Grant Catherine A. Gao and 95 more Elizabeth S. Malsin Lango Sichizya Hermon Kihshen Kathryn A. Helmin Milica Jovisic Jason Arnold Xochítl G. Pérez-Leonor Hiam Abdala‐Valencia Suchitra Swaminathan Julu Nwaezeapu Mengjia Kang Luke V. Rasmussen Egon A. Ozer Ramon Lorenzo‐Redondo Judd F. Hultquist Lacy M. Simons Estefany Rios-Guzman Alexander V. Misharin Richard G. Wunderink G. R. Scott Budinger Benjamin D. Singer Luisa Morales‐Nebreda Hiam Abdala‐Valencia Luke V. Rasmussen Judd F. Hultquist Lacy Simmons Estefany Rios-Guzman Michael Alexander Arghavan Alisoltani Joseph I. Bailey Elizabeth T. Bartom Ankit Bharat Thomas Bolig Nicole Borkowski Navdeep S. Chandel Katie Clepp John M. Coleman Michael J. Cuttica Thaddeus R. Cybulski Jane E. Dematte Joseph S. Deters Estefani Diaz Alvaro Donayre Helen K. Donnelly Justin A. Fiala Gaurav Gadhvi Khalilah L. Gates Samuel W. M. Gatesy Pearl D. Go Cara J. Gottardi Stefan J. Green Elen Gusman SeungHye Han Erica M. Hartmann Alan R. Hauser Curt M. Horvath Mishaal Hukamdad Sydney M. Hyder Manu Jain Emmy Jonasson Anthony M. Joudi Rachel Kadar Ravi Kalhan David W. Kamp Manoj Kandpal David A. Kidd Zasu M. Klug Erin A. Korth Jacqueline M. Kruser Romy Lawrence Emily M. Leibenguth Anne R. Levenson Lindsey D. Gradone Gabrielle Y. Liu Jon W. Lomasney Theresa A. Lombardo Ziyan Lu Amy Ludwig Ali Mahmoud Alexandra C. McQuattie‐Pimentel Daniel Meza Ruben Mylvaganam Prasanth Nannapaneni Sophia Nozick Luı́s A. Nunes Amaral Radhika A. Patel Anna Pawlowski Chiagozie I. Pickens Yuliya Politanska Taylor A. Poor Michelle Prickett Chao Qi Melissa Querrey Karen M. Ridge Madeline L. Rosenbaum

10.1038/s41590-024-01914-w article EN Nature Immunology 2024-08-13

Methicillin-resistant Staphylococcus aureus (MRSA) is a common cause of hospital-acquired pneumonia (HAP) and ventilator-associated (VAP). MRSA associated with significant morbidity mortality. Several virulence factors allow S. to become an effective pathogen. The polysaccharide intracellular adhesin allows for the production biofilms, some strains can produce capsular polysaccharides that protect against phagocytosis, microbial surface components recognizing adhesive matrix molecules...

10.1055/s-0041-1740583 article EN Seminars in Respiratory and Critical Care Medicine 2022-02-15

Critically ill patients who develop invasive pulmonary aspergillosis (IPA) have high mortality rates despite antifungal therapy. Diagnosis is difficult in these and incidences vary the literature. Bronchoalveolar lavage (BAL) fluid galactomannan (GM) a helpful marker, although optimal cutoff unclear. This was single-center cohort study of requiring mechanical ventilation medical intensive care unit (ICU) from June 2018 to March 2023. Demographics, BAL, outcome data were extracted electronic...

10.1093/ofid/ofaf090 article EN cc-by-nc-nd Open Forum Infectious Diseases 2025-02-12

In this pilot study, we used shotgun metagenome sequencing (SMS) strategy on bronchoalveolar lavage (BAL) samples from hospitalized patients with suspected ventilate-associated pneumonia (VAP) in order to explore its potential for improving detection of ventilator-associated-pneumonia etiology.In total, 67BAL VAP were tested SMS respiratory pathogens. Results and routine culture compared.SMS detected all pathogens recovered by cultivation approaches. addition, putative other than the...

10.1099/jmm.0.000968 article EN Journal of Medical Microbiology 2019-05-28

Abstract Some patients infected with Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) develop severe pneumonia and the acute respiratory distress syndrome (ARDS) [1]. Distinct clinical features in these have led to speculation that immune response virus SARS-CoV-2-infected alveolus differs from other types of [2]. We collected bronchoalveolar lavage fluid samples 86 SARS-CoV-2-induced failure 252 known or suspected pathogens subjected them flow cytometry bulk transcriptomic...

10.1101/2020.08.05.238188 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2020-08-05

Abstract Rationale Critically ill patients who develop invasive pulmonary aspergillosis (IPA) have high mortality rates despite antifungal therapy. Diagnosis is difficult in these patients. Bronchoalveolar lavage (BAL) fluid galactomannan (GM) a helpful marker of infection, although the optimal cutoff for IPA unclear. We aimed to evaluate BAL GM and fungal culture results, demographics, outcomes among large cohort mechanically ventilated with suspected pneumonia. Methods A single-center...

10.1101/2024.02.07.24302392 preprint EN cc-by-nc-nd medRxiv (Cold Spring Harbor Laboratory) 2024-02-07

Introduction: In patients with suspected pneumonia who are tested respiratory culture and multiplex PCR, the potential added benefit of next-generation sequencing technologies is unknown. Methods: This was a single-center, retrospective study in which residual bronchoalveolar lavage (BAL) specimens were retrieved from hospitalized patients. We compared its research-use-only Respiratory Pathogen Illumina Panel (RPIP) results to BioFire® FilmArray Pneumonia (BioFire® PN) critically ill...

10.3390/diagnostics14131388 article EN cc-by Diagnostics 2024-06-29

Abstract The microbiology of severe community acquired pneumonia (SCAP) has implications on management, clinical outcomes and public health policy. Therefore, knowledge the etiologies SCAP methods to identify these microorganisms is key. Bacteria including Streptococcus pneumoniae, Staphylococcus aureus Enterobacteriaceae continue be important causes SCAP. Viruses remain most commonly identified etiology Atypical organisms are also critical for health. With increased number immunocompromised...

10.1055/s-0043-1777770 article EN Seminars in Respiratory and Critical Care Medicine 2024-01-09

Severe community-acquired pneumonia secondary to SARS-CoV-2 is a leading cause of death. Current guidelines recommend patients with receive empirical antibiotic therapy for suspected bacterial superinfection, but little evidence supports these recommendations. We obtained bronchoscopic bronchoalveolar lavage (BAL) samples from requiring mechanical ventilation. analyzed BAL multiplex PCR and quantitative culture determine the prevalence superinfecting pathogens at time intubation identify...

10.1101/2021.01.12.20248588 preprint EN medRxiv (Cold Spring Harbor Laboratory) 2021-01-15

Antibiotic stewardship in critically ill pneumonia patients is crucial yet challenging, partly due to the limited diagnostic yield of noninvasive infectious tests. In this study, we report an antibiotic prescription pattern informed by bronchoalveolar lavage (BAL) results, where clinicians de-escalate antibiotics based on combination quantitative cultures and multiplex PCR rapid

10.1101/2024.09.10.24313149 preprint EN cc-by-nc-nd medRxiv (Cold Spring Harbor Laboratory) 2024-09-10

Abstract Vancomycin overuse is common, yet few data are available regarding how to improve stewardship of this antibiotic. We identify an association between use a PCR assay rule out MRSA pneumonia and significant, sustained decrease in average vancomycin days therapy over 30-month period.

10.1017/ice.2020.1406 article EN Infection Control and Hospital Epidemiology 2021-02-01

Community-acquired pneumonia (CAP) is a significant cause of morbidity and mortality, one the most common reasons for infection-related death worldwide. Causes CAP include numerous viral, bacterial, fungal pathogens, though frequently no specific organism found. Beginning in 2019, COVID-19 pandemic has caused incredible mortality. many features typical such as fever, respiratory distress, cough, can be difficult to distinguish from other types CAP. Here, we highlight unique clinical...

10.1055/s-0042-1759889 article EN Seminars in Respiratory and Critical Care Medicine 2023-01-16

Pneumonia is an infection associated with substantial morbidity and mortality [1]. The etiology of pneumonia often difficult to identify in hospitalized patients, but important ascertain order enhance antibiotic stewardship [2, 3]. There growing interest the use PCR-based diagnostic platforms improve diagnosis treatment intensive care unit (ICU). A test that facilitates prompt identification a pathogen may speed initiation appropriate therapy. Conversely, negative predicts qualitative...

10.1183/23120541.00343-2023 article EN cc-by-nc ERJ Open Research 2023-08-31
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