Research Topics
| J Kristie JohnsonSummaryAffiliation: University of Maryland Country: USA Publications
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Publications
Skin and soft tissue infections caused by methicillin-resistant Staphylococcus aureus USA300 cloneJennifer K Johnson
Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
Emerg Infect Dis 13:1195-200. 2007..5). The increase in community-associated MRSA infections and the overall increase in SSTIs in our population suggest that USA300 is becoming more virulent and has a greater propensity to cause SSTIs...- Multilocus sequence typing compared to pulsed-field gel electrophoresis for molecular typing of Pseudomonas aeruginosaJennifer K Johnson
Department of Pathology, University of Maryland School of Medicine, MSTF, Baltimore, MD 21201, USA
J Clin Microbiol 45:3707-12. 2007..999 versus 0.975, respectively). Thus, while MLST was better for detecting genetic relatedness, we determined that PFGE was more discriminatory than MLST for determining genetic differences in P. aeruginosa... - The role of patient-to-patient transmission in the acquisition of imipenem-resistant Pseudomonas aeruginosa colonization in the intensive care unitJ Kristie Johnson
Department of Pathology, Institute of Genomic Sciences, University of Maryland School of Medicine, 10 South Pine Street, Baltimore, MD 21201, USA
J Infect Dis 200:900-5. 2009..Imipenem-resistant Pseudomonas aeruginosa (IRPA) is an emerging problem. The causal role of antibiotic selective pressure versus patient-to-patient transmission has not been assessed using a large cohort... - Comparative effectiveness of nafcillin or cefazolin versus vancomycin in methicillin-susceptible Staphylococcus aureus bacteremiaMarin L Schweizer
Department of Epidemiology and Preventive Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
BMC Infect Dis 11:279. 2011..The outcome of interest for this study was 30-day in-hospital mortality... - Risk factors for development of intestinal colonization with imipenem-resistant Pseudomonas aeruginosa in the intensive care unit settingAnthony D Harris
Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
Infect Control Hosp Epidemiol 32:719-22. 2011..The aim of this study was to quantify potential risk factors for the development of IRPA not due to patient-to-patient transmission... - USA300 methicillin-resistant Staphylococcus aureus bacteremia and the risk of severe sepsis: is USA300 methicillin-resistant Staphylococcus aureus associated with more severe infections?Kristen M Kreisel
University of Maryland Baltimore, Baltimore, MD 21201, USA
Diagn Microbiol Infect Dis 70:285-90. 2011..82; 95% confidence interval, 1.16-2.87; P = 0.01). This suggests that patients with USA300 MRSA are more likely to develop severe sepsis in response to their infection, which could be due to host or bacterial differences... - Transfer of multidrug-resistant bacteria to healthcare workers' gloves and gowns after patient contact increases with environmental contaminationDaniel J Morgan
Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
Crit Care Med 40:1045-51. 2012..To assess the role of environmental contamination in the transmission of multidrug-resistant bacteria to healthcare workers' clothing... - Empiric antibiotic therapy for Staphylococcus aureus bacteremia may not reduce in-hospital mortality: a retrospective cohort studyMarin L Schweizer
Department of Epidemiology and Preventive Medicine, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
PLoS ONE 5:e11432. 2010..We aimed to measure the clinical impact of appropriate empiric antibiotic therapy on mortality, while statistically adjusting for comorbidities, severity of illness and presence of virulence factors in the infecting strain... - Systematic review of measurement and adjustment for colonization pressure in studies of methicillin-resistant Staphylococcus aureus, vancomycin-resistant enterococci, and clostridium difficile acquisitionAdebola O Ajao
Department of Epidemiology and Public Health, University of Maryland School of Medicine, 685 West Baltimore Street, MSTF Room 360 Baltimore, Maryland 21201, USA
Infect Control Hosp Epidemiol 32:481-9. 2011.... - Environmental contamination because of multidrug-resistant Acinetobacter baumannii surrounding colonized or infected patientsKerri A Thom
University of Maryland, School of Medicine, Baltimore, MD 21201, USA
Am J Infect Control 39:711-5. 2011..Multidrug-resistant (MDR) Acinetobacter baumannii (MDR-AB) is an important nosocomial pathogen associated with significant morbidity and mortality... - Patients with Acinetobacter baumannii bloodstream infections are colonized in the gastrointestinal tract with identical strainsKerri A Thom
Division of Healthcare Outcomes Research, Department of Epidemiology and Preventive Medicine, University of Maryland School of Medicine, 100 N Greene Street, Baltimore, MD 21201, USA
Am J Infect Control 38:751-3. 2010..Seven patients with imipenem-resistant A baumannii bacteremia were identified from January to June of 2008. Six of 7 (86%) patients were colonized in the gastrointestinal tract with genetically similar strains preceding their bacteremia... - Survival of methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus spp. for an extended period of transportGwen L Robinson
University of Maryland, Department of Pathology, Baltimore, MD, USA
J Clin Microbiol 50:2466-8. 2012..Our study showed that transportation in Liquid Amies medium could be performed at room temperature or 4°C for up to 14 days without a decrease in recovery of MRSA or VRE... 
Association between methicillin-resistant Staphylococcus aureus colonization and infection may not differ by age groupAdebola O Ajao
Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
Infect Control Hosp Epidemiol 34:93-5. 2013..Among 7,405 patients (9,511 admissions), MRSA colonization was significantly associated with infection (adjusted odds ratio, 13.7 [95% confidence interval, 7.3-25.7]) but did not differ significantly by age group...- Assessing the burden of Acinetobacter baumannii in Maryland: a statewide cross-sectional period prevalence surveyKerri A Thom
University of Maryland School of Medicine, Baltimore, Maryland, USA
Infect Control Hosp Epidemiol 33:883-8. 2012..To determine the prevalence of Acinetobacter baumannii, an important healthcare-associated pathogen, among mechanically ventilated patients in Maryland... - Illicit drug use and risk for USA300 methicillin-resistant Staphylococcus aureus infections with bacteremiaKristen M Kreisel
Department of Epidemiology and Preventive Medicine, University of Maryland Baltimore, Baltimore, MD 21201, USA
Emerg Infect Dis 16:1419-27. 2010..23 for trend). Notably, the proportion of patients with USA300 MRSA bacteremia who did not use illicit drugs increased over time. This finding suggests that this strain has spread from users of illicit drugs to other populations... - Comparison of the methicillin-resistant Staphylococcus aureus acquisition among rehabilitation and nursing home residentsJon P Furuno
Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
Infect Control Hosp Epidemiol 32:244-9. 2011..To assess risk factors for methicillin-resistant Staphylococcus aureus (MRSA) acquisition among extended care residents focusing on level of care (residential vs rehabilitation) and room placement with an MRSA-positive resident... - Persistent Staphylococcus aureus colonization is not a strongly heritable trait in Amish familiesMary Claire Roghmann
University of Maryland School of Medicine, Baltimore, Maryland, United States of America
PLoS ONE 6:e17368. 2011..aureus colonization in this community... - Frequent multidrug-resistant Acinetobacter baumannii contamination of gloves, gowns, and hands of healthcare workersDaniel J Morgan
Departments of Epidemiology and Preventive Medicine, University of Maryland, Baltimore, Baltimore, MD 21201, USA
Infect Control Hosp Epidemiol 31:716-21. 2010..Multidrug-resistant (MDR) gram-negative bacilli are important nosocomial pathogens... - Comparison of swab and sponge methodologies for identification of Acinetobacter baumannii from the hospital environmentKerri A Thom
Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
J Clin Microbiol 50:2140-1. 2012..The sensitivity of the swab method was 87%, while the sensitivity of the sponge method was 75%. Given the comparable results, use of the cheaper and less laborious swab technique is acceptable and may be preferable... - Genomic comparison of multi-drug resistant invasive and colonizing Acinetobacter baumannii isolated from diverse human body sites reveals genomic plasticityJason W Sahl
Department of Microbiology, Institute for Genome Sciences, Baltimore, MD 21201, USA
BMC Genomics 12:291. 2011..baumannii strains isolated from distinct body sites. Isolates from blood, peri-anal, and wound sources were examined in an attempt to identify genetic features that could be correlated to each isolation source... - Improving efficiency in active surveillance for methicillin-resistant Staphylococcus aureus or vancomycin-resistant Enterococcus at hospital admissionDaniel J Morgan
Veterans Affairs Maryland Healthcare System, Baltimore, Maryland, USA
Infect Control Hosp Epidemiol 31:1230-5. 2010..Design and setting. Prospective cohort of adult inpatients admitted to the medical and surgical wards of a 119-bed tertiary care VA hospital... 
An unusual Gram stain findingKirk M Chan-Tack
University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
Clin Infect Dis 40:1649, 1677-8. 2005- Identifying groups at high risk for carriage of antibiotic-resistant bacteriaJon P Furuno
Department of Epidemiology and Preventive Medicine, University of Maryland School of Medicine, Baltimore 21201, USA
Arch Intern Med 166:580-5. 2006..We aimed to develop a highly sensitive, simple-to-administer prediction rule to identify subpopulations of patients at high risk for colonization on hospital admission... - Increasing incidence of Candida parapsilosis candidemia with caspofungin usageGraeme N Forrest
Division of Infectious Diseases, Department of Medicine, University of Maryland, 20 Penn Street, Room S403B, Baltimore, MD 21201, USA
J Infect 56:126-9. 2008..To determine the impact on the change in epidemiology of Candida species at our institution since the introduction of caspofungin... - MRSA with progression from otitis media and sphenoid sinusitis to clival osteomyelitis, pachymeningitis and abducens nerve palsy in an immunocompetent 10-year-old patientMatthew B Laurens
Department of Pediatrics, Division of Infectious Disease and Tropical Pediatrics, University of Maryland School of Medicine, Baltimore, MD 21201, USA
Int J Pediatr Otorhinolaryngol 72:945-51. 2008..This case exemplifies an aggressive MRSA intracranial infection that advanced despite antibiotic therapy... - Peptide nucleic acid fluorescent in situ hybridization for hospital-acquired enterococcal bacteremia: delivering earlier effective antimicrobial therapyGraeme N Forrest
Division of Infectious Diseases, University of Maryland School of Medicine, Baltimore, Maryland, USA
Antimicrob Agents Chemother 52:3558-63. 2008..04). The EFOE PNA FISH test in conjunction with an AMT treatment algorithm resulted in earlier initiation of appropriate empirical antimicrobial therapy for patients with hospital-acquired E. faecium bacteremia... - Clinical utility of infection control documentation of prior methicillin-resistant Staphylococcus aureus colonization or infection for optimization of empirical antibiotic therapyMarin L Schweizer
Department of Epidemiology, University of Maryland School of Medicine, Baltimore, Maryland 2201, USA
Infect Control Hosp Epidemiol 29:972-4. 2008..Documented prior MRSA colonization or infection was predictive of subsequent MRSA infections (odds ratio, 4.05). Physicians appear to use this documentation when prescribing empirical therapy for suspected bacteremia... - Prevalence of Candida dubliniensis fungemia at a large teaching hospitalMary Ann Jabra-Rizk
Department of Diagnostic Sciences and Pathology, Dental School, University of Maryland, Baltimore, MD 21201, USA
Clin Infect Dis 41:1064-7. 2005..Peptide nucleic acid fluorescent in situ hybridization analysis was used as a rapid and reliable test for differentiating C. dubliniensis from Candida albicans, making it feasible to determine the prevalence of C. dubliniensis fungemia... - Targeted surveillance of methicillin-resistant Staphylococcus aureus and its potential use to guide empiric antibiotic therapyAnthony D Harris
Department of Epidemiology and Preventive Medicine, University of Maryland School of Medicine, 685 W Baltimore St, Room 330, Baltimore, MD 21201, USA
Antimicrob Agents Chemother 54:3143-8. 2010..The risk of MRSA infection was far higher in those who were deemed to be at high risk and who were surveillance culture positive. Targeted MRSA active surveillance may be beneficial in guiding empiric anti-MRSA therapy... - Impact of rapid in situ hybridization testing on coagulase-negative staphylococci positive blood culturesGraeme N Forrest
Division of Infectious Diseases, University of Maryland School of Medicine, Baltimore, MD, USA
J Antimicrob Chemother 58:154-8. 2006..We evaluated the effectiveness of the early identification of CoNS by ruling out S. aureus in conjunction with an antimicrobial team (AMT) on antimicrobial therapy, patient length of stay and hospital costs... - Recovery of Gram-negative bacilli in stored endotracheal aspiratesTarah D Ranke
Departments of Pathology, School of Medicine, University of Maryland, Baltimore, USA
J Clin Microbiol 50:2791-2. 2012.... - Genome sequence of Klebsiella oxytoca 11492-1, a nosocomial isolate possessing a FOX-5 AmpC β-lactamaseTracy H Hazen
Institute for Genome Sciences and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
J Bacteriol 194:3028-9. 2012..The K. oxytoca 11492-1 draft genome contains multiple antibiotic resistance genes, including a FOX-5 AmpC β-lactamase encoded on a large IncA/C plasmid... - How important is patient-to-patient transmission in extended-spectrum beta-lactamase Escherichia coli acquisitionAnthony D Harris
Department of Epidemiology and Preventive Medicine, University of Maryland, 100 North Greene Street, Baltimore, MD 21201, USA
Am J Infect Control 35:97-101. 2007..The objective of this study was to quantify the amount of patient-to-patient transmission among patients who acquire an ESBL-producing E coli infection using perianal surveillance cultures in an intensive care unit (ICU) population... - Colonization sites of USA300 methicillin-resistant Staphylococcus aureus in residents of extended care facilitiesSimone M Shurland
Department of Epidemiology and Preventive Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
Infect Control Hosp Epidemiol 30:313-8. 2009..The anterior nares are the most sensitive single site for detecting methicillin-resistant Staphylococcus aureus (MRSA) colonization. Colonization patterns of USA300 MRSA colonization are unknown... - Prolonged colonization with the methicillin-resistant Staphylococcus aureus strain USA300 among residents of extended care facilitiesSimone M Shurland
Department of Epidemiology and Preventive Medicine, University of Maryland School of Medicine, and the Veterans Affairs Maryland Health Care System, Baltimore, Maryland 20201, USA
Infect Control Hosp Epidemiol 31:838-41. 2010..We found no difference in prolonged colonization (adjusted odds ratio, 1.1 [95% confidence interval, 0.5-2.4])... - Dog bite transmission of antibiotic-resistant bacteria to a humanJennifer K Johnson
Department of Pathology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
Infect Control Hosp Epidemiol 27:762-3. 2006..This report describes a case of a companion dog that was treated with multiple courses of antibiotics for a chronic illness and transmitted multidrug-resistant bacteria to a human through a bite... - Methicillin-resistant Staphylococcus aureus infection and colonization among hospitalized prisonersMarc Oliver Wright
Evanston Northwestern Healthcare, Department of Infection Control, Evanston, IL 60201, USA
Infect Control Hosp Epidemiol 28:877-9. 2007..Hospitalized prisoners are at high risk for MRSA infection and colonization, and surveillance should include cultures of nares and wound samples... - Multicenter evaluation of the Candida albicans/Candida glabrata peptide nucleic acid fluorescent in situ hybridization method for simultaneous dual-color identification of C. albicans and C. glabrata directly from blood culture bottlesJaneen R Shepard
AdvanDx, Inc, 10A Roessler Road, Woburn, MA 01801, USA
J Clin Microbiol 46:50-5. 2008..albicans and C. glabrata in positive blood culture bottles. This rapid assay may aid in the selection of initial antifungal drugs, leading to improved patient outcomes... - The prodromal questionnaire (PQ): preliminary validation of a self-report screening measure for prodromal and psychotic syndromesRachel L Loewy
Department of Psychology, University of California, Los Angeles, 1285 Franz Hall Box 951563, Los Angeles, CA 90095 1563, USA
Schizophr Res 79:117-25. 2005..The PQ shows good preliminary validity in detecting individuals with an interview-diagnosed prodromal or psychotic syndrome, but it is less sensitive to the threshold between prodromal and full-blown psychosis...