Omid Bakhtar

ORCID: 0000-0003-2638-3663
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • SARS-CoV-2 and COVID-19 Research
  • SARS-CoV-2 detection and testing
  • COVID-19 Clinical Research Studies
  • Colorectal Cancer Screening and Detection
  • Genetic factors in colorectal cancer
  • Animal Virus Infections Studies
  • COVID-19 epidemiological studies
  • Dialysis and Renal Disease Management
  • Cancer and Skin Lesions
  • Biosensors and Analytical Detection
  • Migraine and Headache Studies
  • Vasculitis and related conditions
  • Cancer Diagnosis and Treatment
  • AI in cancer detection
  • Vaccine Coverage and Hesitancy
  • Colorectal and Anal Carcinomas
  • Orthopaedic implants and arthroplasty
  • Trigeminal Neuralgia and Treatments
  • Breast Lesions and Carcinomas
  • Vascular anomalies and interventions
  • Hospital Admissions and Outcomes
  • Congenital gastrointestinal and neural anomalies
  • Chronic Kidney Disease and Diabetes
  • Ophthalmology and Eye Disorders
  • Acute Kidney Injury Research

Sharp HealthCare Foundation
2020-2024

Museum of Heilongjiang Province
2021

Pacific Rim Engineering (United States)
2020

Scripps Clinic
2020

Banner - University Medical Center Tucson
2015

University of Arizona
2014

Michigan State University
2007-2008

University at Buffalo, State University of New York
2008

VA Western New York Healthcare System
2008

VA San Diego Healthcare System
2007

Smruthi Karthikeyan Joshua I. Levy Peter De Hoff Greg Humphrey Amanda Birmingham and 95 more Kristen Jepsen Sawyer Farmer Helena M. Tubb Tommy Valles Caitlin Tribelhorn Rebecca Tsai Stefan Aigner Shashank Sathe Niema Moshiri Benjamin Henson Adam M. Mark Abbas Hakim Nathan A. Baer Tom Barber Pedro Belda‐Ferre Marisol Chacón Willi Cheung Evelyn S. Cresini Emily Eisner Alma L. Lastrella Elijah S. Lawrence Clarisse Marotz Toan T. Ngo Tyler Ostrander Ashley Plascencia Rodolfo A. Salido Phoebe Seaver Elizabeth W. Smoot Daniel McDonald Robert M. Neuhard Angela L. Scioscia Alysson M. Satterlund Elizabeth H. Simmons Dismas B. Abelman David A. Brenner Judith C. Bruner Anne F. Buckley M. Ellison Jeffrey Gattas Steven L. Gonias Matt Hale Faith Hawkins Lydia Ikeda Hemlata Jhaveri Ted W. Johnson Vince Kellen Brendan Kremer Gary Matthews Ronald W. McLawhon Pierre Ouillet Daniel Park Allorah Pradenas Sharon L. Reed Lindsay Riggs Alison Sanders Bradley Sollenberger Angela Song Benjamin L. White Terri Winbush Christine M. Aceves Catelyn Anderson Karthik Gangavarapu Emory Hufbauer Ezra Kurzban Justin Lee Nathaniel L. Matteson Edyth Parker Sarah A. Perkins Karthik Ramesh Refugio Robles‐Sikisaka Madison A. Schwab Emily Spencer Shirlee Wohl Laura Nicholson Ian McHardy David Dimmock Charlotte A. Hobbs Omid Bakhtar Aaron Harding Art Mendoza Alexandre Bolze David G. Becker Elizabeth T. Cirulli Magnus Isaksson Kelly M. Schiabor Barrett Nicole L. Washington John D. Malone Ashleigh Murphy Schafer Nikos Gurfield Sarah Stous Rebecca Fielding‐Miller Richard S. Garfein Tommi Gaines Cheryl A.M. Anderson Natasha K. Martin

Abstract As SARS-CoV-2 continues to spread and evolve, detecting emerging variants early is critical for public health interventions. Inferring lineage prevalence by clinical testing infeasible at scale, especially in areas with limited resources, participation, or and/or sequencing capacity, which can also introduce biases 1–3 . RNA concentration wastewater successfully tracks regional infection dynamics provides less biased abundance estimates than 4,5 Tracking virus genomic sequences...

10.1038/s41586-022-05049-6 article EN cc-by Nature 2022-07-07

Summary As of January 2021, the highly transmissible B.1.1.7 variant SARS-CoV-2, which was first identified in United Kingdom (U.K.), has gained a strong foothold across world. Because sudden and rapid rise B.1.1.7, we investigated prevalence growth dynamics this States (U.S.), tracking it back to its early emergence onward local transmission. We found that RT-qPCR testing anomaly S gene target failure (SGTF), observed U.K., reliable proxy for detection. sequenced 212 SARS-CoV-2 genomes...

10.1101/2021.02.06.21251159 preprint EN cc-by-nc medRxiv (Cold Spring Harbor Laboratory) 2021-02-07

Context.— The adoption of digital capture pathology slides as whole slide images (WSI) for educational and research applications has proven utility. Objective.— To compare pathologists' primary diagnoses derived from WSI versus the standard microscope. Because WSIs differ in format method observation compared with current glass microscopy, this study is critical to potential clinical pathology. Design.— enrolled a total 2045 cases enriched more difficult diagnostic categories represented...

10.5858/arpa.2019-0569-oa article EN Archives of Pathology & Laboratory Medicine 2020-02-14
Smruthi Karthikeyan Joshua I. Levy Peter De Hoff Greg Humphrey Amanda Birmingham and 95 more Kristen Jepsen Sawyer Farmer Helena M. Tubb Tommy Valles Caitlin Tribelhorn Rebecca Tsai Stefan Aigner Shashank Sathe Niema Moshiri Benjamin Henson Adam M. Mark Abbas Hakim Nathan A. Baer Tom Barber Pedro Belda‐Ferre Marisol Chacón Willi Cheung Evelyn S. Cresini Emily Eisner Alma L. Lastrella Elijah S. Lawrence Clarisse Marotz Toan T. Ngo Tyler Ostrander Ashley Plascencia Rodolfo A. Salido Phoebe Seaver Elizabeth W. Smoot Daniel McDonald Robert M. Neuhard Angela L. Scioscia Alysson M. Satterlund Elizabeth H. Simmons Dismas B. Abelman David A. Brenner Judith C. Bruner Anne F. Buckley M. Ellison Jeffrey Gattas Steven L. Gonias Matt Hale Faith Hawkins Lydia Ikeda Hemlata Jhaveri Ted W. Johnson Vince Kellen Brendan Kremer Gary Matthews Ronald W. McLawhon Pierre Ouillet Daniel Park Allorah Pradenas Sharon L. Reed Lindsay Riggs Alison Sanders Bradley Sollenberger Angela Song Benjamin L. White Terri Winbush Christine M. Aceves Catelyn Anderson Karthik Gangavarapu Emory Hufbauer Ezra Kurzban Justin Lee Nathaniel L. Matteson Edyth Parker Sarah A. Perkins Karthik Ramesh Refugio Robles‐Sikisaka Madison A. Schwab Emily Spencer Shirlee Wohl Laura Nicholson Ian McHardy David Dimmock Charlotte A. Hobbs Omid Bakhtar Aaron Harding Art Mendoza Alexandre Bolze David G. Becker Elizabeth T. Cirulli Magnus Isaksson Kelly M. Schiabor Barrett Nicole L. Washington John D. Malone Ashleigh Murphy Schafer Nikos Gurfield Sarah Stous Rebecca Fielding‐Miller Richard S. Garfein Tommi Gaines Cheryl A.M. Anderson Natasha K. Martin

Summary As SARS-CoV-2 continues to spread and evolve, detecting emerging variants early is critical for public health interventions. Inferring lineage prevalence by clinical testing infeasible at scale, especially in areas with limited resources, participation, or testing/sequencing capacity, which can also introduce biases. RNA concentration wastewater successfully tracks regional infection dynamics provides less biased abundance estimates than testing. Tracking virus genomic sequences...

10.1101/2021.12.21.21268143 preprint EN cc-by-nd medRxiv (Cold Spring Harbor Laboratory) 2021-12-27
Nathaniel L. Matteson Gabriel W. Hassler Ezra Kurzban Madison A. Schwab Sarah A. Perkins and 95 more Karthik Gangavarapu Joshua I. Levy Edyth Parker David T. Pride Abbas Hakim Peter De Hoff Willi Cheung Anelizze Castro-Martínez Andrea Rivera Anthony Veder Ariana Rivera Cassandra Wauer Jacqueline Holmes Jedediah Wilson Shayla N. Ngo Ashley Plascencia Elijah S. Lawrence Elizabeth W. Smoot Emily Eisner Rebecca Tsai Marisol Chacón Nathan A. Baer Phoebe Seaver Rodolfo A. Salido Stefan Aigner Toan T. Ngo Tom Barber Tyler Ostrander Rebecca Fielding‐Miller Elizabeth H. Simmons Oscar E. Zazueta Idanya Serafin-Higuera Manuel Sánchez-Alavez José L. Moreno-Camacho Abraham García-Gil Ashleigh R. Murphy Schafer Eric McDonald Jeremy Corrigan John D. Malone Sarah Stous Seema Shah Niema Moshiri Alana Weiss Catelyn Anderson Christine M. Aceves Emily Spencer Emory Hufbauer Justin Lee Alison J. King Karthik Ramesh Kelly N. Nguyen Kieran Saucedo Refugio Robles‐Sikisaka Kathleen M. Fisch Steven L. Gonias Amanda Birmingham Daniel McDonald Smruthi Karthikeyan Natasha K. Martin Robert T. Schooley Agustin J. Negrete Horacio J. Reyna Jose R. Chavez María L. García José Manuel Cornejo‐Bravo David G. Becker Magnus Isaksson Nicole L. Washington William Lee Richard S. Garfein Marco A. Luna-Ruiz Esparza Jonathan Alcántar‐Fernández Benjamin Henson Kristen Jepsen Beatriz Olivares-Flores Gisela Barrera-Badillo Irma López‐Martínez José Ernesto Ramírez–González Rita Flores-León Stephen F. Kingsmore Alison Sanders Allorah Pradenas Benjamin L. White Gary Matthews Matt Hale Ronald W. McLawhon Sharon L. Reed Terri Winbush Ian McHardy Russel A. Fielding Laura Nicholson Michael Quigley Aaron Harding Art Mendoza Omid Bakhtar

10.1016/j.cell.2023.11.024 article EN Cell 2023-12-01

To examine whether a significant difference exists between the reported ranges of granular and muddy brown casts in urine specimens using manual microscopy compared with an automated analyzer cohort patients acute kidney injury (AKI).Freshly voided from 25 consecutive who were under evaluation by Department Nephrology for AKI simultaneously examined iQ200 system performed trained observer. We coded results according to number pathological identified 3 × 2 Freeman-Halton extension Fisher...

10.1309/lmvjk6w4kql1zhks article EN Laboratory Medicine 2014-11-01

J Clin Hypertens (Greenwich) . 2012; 14:618–622. © 2012 Wiley Periodicals, Inc. Resistant hypertension (RH) affects 8% to 30% of hypertensive patients. Blood pressure (BP) reflects the interaction between vascular compliance, resistance flow, intravascular volume, and cardiac contractility. The relationship RH with total arterial compliance index (TACI) has not been adequately explored. period prevalence (RH at baseline or follow‐up) was determined in a cohort (N=156) compared across...

10.1111/j.1751-7176.2012.00653.x article EN Journal of Clinical Hypertension 2012-05-18

To compare metabolism in the brains of migraineurs during headache-free periods with those obtained from healthy volunteers.Eleven (defined by International Headache Society's criteria) presented spontaneous intervals to undergo (18)FDG PET brain imaging glucose metabolism. The control group consisted 14 volunteers. Comparison images was done using Statistical Parametric Mapping detect significant (P < .05) differences between 2 groups.Two regions increase uptake were identified relative...

10.1111/j.1526-4610.2008.01206.x article EN Headache The Journal of Head and Face Pain 2008-07-24

Abstract: Background: Gender dimorphism and marital status on colorectal cancer mortality have 9 been previously documented, but the relationship between these factors DNA mismatch repair 10 protein (MMRP) expression is unknown. Methods: Colectomy specimens were reviewed ret- 11 rospectively for patients 2018 to 2023 with demographics including race/ethnicity, gender, 12 status, faith, body mass index, pathologic staging, MMRP status. Statistical 13 analyses performed by using baseline...

10.20944/preprints202407.1460.v1 preprint EN 2024-07-18

Postmortem dissection of the 18-week male conceptus, product intracytoplasmic sperm injection (ICSI), demonstrated hallmark findings sirenomelia. The lower legs were fused and left knee was rotated medially. Internal organs showed hypoplastic lungs, a multicystic kidney, unilateral ureteral hypoplasia. vitelline artery absorbed, in classic fashion, into umbilical communicated with aorta at point proximal to iliac arteries. tributaries distal this hypoplastic. This finding is consistent...

10.2350/08-05-0092.1 article EN Pediatric and Developmental Pathology 2006-05-01

Among 1,770 healthcare workers serving in high-risk care areas for coronavirus disease 2019 (COVID-19), 39 (2.2%) were seropositive. Exposure to severe acute respiratory virus 2 (SARS-CoV-2) the community was associated with being Job or unit type and percentage of time working COVID-19 patients not positive antibody tests.

10.1017/ice.2020.1370 article EN cc-by Infection Control and Hospital Epidemiology 2020-12-15

The objective of this study was to examine the cerebral circulation during spontaneous migraine attacks and compare changes an experimental headache model induced by nitroglycerin (NTG) infusion. This prospective carried out in a tertiary care hospital on migraineurs with or without aura. Healthy volunteers served as controls. There were no interventions. Flow velocity (FV) pulsatility index (PI) measured between attacks. In controls, FV PI middle arteries performed at baseline after each IV...

10.1007/s10194-007-0413-8 article EN cc-by-nc The Journal of Headache and Pain 2007-10-01
Nathaniel L. Matteson Gabriel W. Hassler Ezra Kurzban Madison A. Schwab Sarah A. Perkins and 95 more Karthik Gangavarapu Joshua I. Levy Edyth Parker David T. Pride Abbas Hakim Peter De Hoff Willi Cheung Anelizze Castro-Martínez Andrea Rivera Anthony Veder Ariana Rivera Cassandra Wauer Jacqueline Holmes Jedediah Wilson Shayla N. Ngo Ashley Plascencia Elijah S. Lawrence Elizabeth W. Smoot Emily Eisner Rebecca Tsai Marisol Chacón Nathan A. Baer Phoebe Seaver Rodolfo A. Salido Stefan Aigner Toan T. Ngo Tom Barber Tyler Ostrander Rebecca Fielding‐Miller Elizabeth H. Simmons Oscar E. Zazueta Idanya Serafin-Higuera Manuel Sánchez-Alavez José L. Moreno-Camacho Abraham García-Gil Ashleigh R. Murphy Schafer Eric McDonald Jeremy Corrigan John D. Malone Sarah Stous Seema Shah Niema Moshiri Alana Weiss Catelyn Anderson Christine M. Aceves Emily Spencer Emory Hufbauer Justin Lee Karthik Ramesh Kelly N. Nguyen Kieran Saucedo Refugio Robles‐Sikisaka Kathleen M. Fisch Steven L. Gonias Amanda Birmingham Daniel McDonald Smruthi Karthikeyan Natasha K. Martin Robert T. Schooley Agustin J. Negrete Horacio J. Reyna Jose R. Chavez María L. García José Manuel Cornejo‐Bravo David G. Becker Magnus Isaksson Nicole L. Washington William Lee Richard S. Garfein Marco A. Luna-Ruiz Esparza Jonathan Alcántar‐Fernández Benjamin Henson Kristen Jepsen Beatriz Olivares-Flores Gisela Barrera-Badillo Irma López‐Martínez José Ernesto Ramírez–González Rita Flores-León Stephen F. Kingsmore Alison Sanders Allorah Pradenas Benjamin L. White Gary Matthews Matt Hale Ronald W. McLawhon Sharon L. Reed Terri Winbush Ian McHardy Russel A. Fielding Laura Nicholson Michael Quigley Aaron Harding Art Mendoza Omid Bakhtar Sara H. Browne

Summary The maturation of genomic surveillance in the past decade has enabled tracking emergence and spread epidemics at an unprecedented level. During COVID-19 pandemic, for example, data revealed that local varied considerably frequency SARS-CoV-2 lineage importation persistence, likely due to a combination restrictions changing connectivity. Here, we show are driven by regional transmission, including across international boundaries, but can become increasingly connected distant locations...

10.1101/2023.03.14.23287217 preprint EN cc-by medRxiv (Cold Spring Harbor Laboratory) 2023-03-19

Background: The effect of gender dimorphism and marital status on colorectal cancer mortality have been previously documented, but the relationship between these factors DNA mismatch repair protein (MMRP) expression is unknown. Methods: Colectomy specimens were reviewed retrospectively for patients 2018 2023, with demographics including race/ethnicity, gender, status, faith, body mass index, pathologic staging, MMRP status. Statistical analyses performed by using baseline characteristics...

10.3390/ijtm4030040 article EN cc-by International Journal of Translational Medicine 2024-09-23

Scientific evidence is highly supportive that SARS-CoV-2 (COVID-19 virus) transferred to humans from animals sold at a Wuhan China market in the November–December 2019 time.1 The World Health Organization (WHO) declared public health emergency January 2020 and on March 13, 2020, President of United States outbreak national retroactive 1 2020.2, 3 At time with no vaccination or therapeutic capabilities against virus, multiple nonpharmaceutical interventions were implemented. Over 10-day...

10.1111/josh.13219 article EN Journal of School Health 2022-08-03
Coming Soon ...