Irving Nachamkin, DrPH, MPH, D(ABMM) FAAM FIDSA

faculty photo
Professor of Pathology and Laboratory Medicine at the Hospital of the University of Pennsylvania
Department: Pathology and Laboratory Medicine

Contact information
Department of Pathology and Laboratory Medicine
Room 7-046 Founders Pavilion (Lab Administration)
Hospital of the University of Pennsylvania
3400 Spruce Street
Philadelphia, PA 19104-4283
Office: (215) 662-3435
Fax: (215) 349-5090
B.Sc. (Medical Laboratory Science)
University of Bridgeport, Bridgeport, CT, 1975.
M.P.H. (Public Health Laboratory Practice)
University of North Carolina at Chapel Hill, Chapel Hill, NC, 1978.
Dr.P.H. (Public Health Microbiology)
University of North Carolina at Chapel Hill, Chapel Hill, NC, 1980.
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Description of Research Expertise

I am a co-investigator in the CDC Prevention Epicenter at Penn and our lab is involved in several collaborative studies examining risk factors for development of antimicrobial resistant infections in hospitalized patients and in the community. I also have a special interest in Campylobacter and other gastrointestinal infections, with a focus on diagnostics, antibiotic resistance, and association of Campylobacter with Guillain-Barre Syndrome. Other areas of interest include diagnostic microbiology, molecular diagnostic microbiology, cost-effectiveness of laboratory testing.

Description of Clinical Expertise

I am currently Director of the Division of Laboratory Medicine at the Hospital of the University of Pennsylvania. I also am Associate Director of the Clinical Microbiology Laboratory. My areas of expertise include most areas of clinical microbiology. I have particular interests in the diagnosis of gastrointestinal infections.

Selected Publications

Nachamkin I, Danoski D, Barnes J, Barger J: Sustained reduction in blood culture contamination rates in a university hospital emergency department. Microbe 2018, American Society for Microbiology, Atlanta, GA Page: 246, June 2018.

Lautenbach E, Pegues D, Fuchs B, Martin N, Nachamkin I, Bilker W, Tolomeo P, Cressman L, Omorogbe J, Han JH, for the CDC Prevention Epicenters Program: A Randomized Controlled Trial of the Effect of Accelerated Copper Textiles on Healthcare-Associated Infections and Multidrug-Resistant Organisms: The “Investigating Microbial Pathogen Activity of Copper Textiles” (IMPACT) Study. IDWeek, Oct 3-7, 2018, San Francisco, CA Page: Poster 1961, Oct 2018.

Nachamkin I: Campylobacter and Arcobacter. Manual of Clinical Microbiology, 12th edition. ASM Press, Washington DC, Page: in press, in press 2018.

Cluzet VC, Gerber JS, Nachamkin I, Coffin SE, Davis MF, Julian KG, Zaoutis TE, Metlay JP, Linkin DR, Tolomeo P, Wise JA, Bilder WB, Hu B, Lautenbach E: Factors associated with persistent colonisation with methicillin-resistant Staphylococcus aureus. Epidemiology and Infection 145: 1409-17, May 2017.

Nachamkin, I., Kirn, T., Westblade, L., Humphries, R.: Assessing Clinical Microbiology Practice Guidelines: American Society for Microbiology ad hoc Committee on Evidence-Based Laboratory Medicine Practice Guidelines Assessment. J. Clin. Microbiol. 55: 3194-3200, Nov 2017 Notes: doi: 10.1128/JCM.01124-17.

Nachamkin I, Nguyen P.: Isolation of Campylobacter species from stool samples using a filtration method: assessment from a U.S. based population. J Clin Microbiol 55: 2204-7, July 2017.

Sedrak MS, Myers JS, Small DS, Nachamkin I, Ziemba JB, Murray D, Kurtzman GW, Zhu J, Wang W, Mincarelli D, Danoski D, Wells BP, Berns JS, Brennan PJ, Hanson CW, Dine CJ, Patel MS: Effect of a Price Transparency Intervention in the Electronic Health Record on Clinician Ordering of Inpatient Laboratory Tests: The PRICE Randomized Clinical Trial. JAMA Intern Med Page: ePub ahead of print, April 2017.

Bartsch SM, Umsheid CA, Nachamkin I, Hamilton K, Lee BY.: Comparing the economic and health benefits of different approaches to diagnosing Clostridium difficult infection. Clin Microbiol Infect 21(1): 77.e1-9, Jan 2015.

Garrigan C, Han J, Tolomeo P, Johnson KJ, Master SR, Lautenbach E and Nachamkin I: Evaluation of a research use only luminex based assay for measurement of procalcitonin in serum samples. Am J Translation Research 8: 4362-69, Oct 2016.

Cluzet VC, Gerber JS, Metlay JP, Nachamkin I, Zaoutis TE, Davis MF, Julian KG, Linkin DR, Coffin SE, Margolis DJ, Hollander JE, Biler WB, Han X, Mistry RD, Gavin LJ, Tolomeo P, Wise JA, Wheeler MK, Hu B, Fishman NO, Royer D, Lautenbach E.: The Effect of Total Household Decolonization on Clearance of Colonization with Methicillin-Resistant Staphylococcus aureus. Infect Cont Hosp Epidemiol Page:, July 2016.

Fitzgerald C, Patrick M, Gonzalez A, Akin J, Polage C, Wymore K, Gillim-Ross L, Xavier K, Sadlowski J, Monahan J, Hurd S, Dahlberg S, Jerris R, Watson R, Santovenia M, Mitchell D, Harrison C, Tobin-D'Angelo M, DeMartino M, Pentella M, Leonard C, Razaq J, Jung C, Achong-Bowe R, Evans Y, Jain D, Juni B, Leano F, Robinson R, Smith S, Gittelman R, Garrigan C, Nachamkin I and Campylobacter Diagnostics Study Working Group : Multicenter evaluation of clinical diagnostic methods for detection and isolation of Campylobacter spp. from stool. J Clin Microbiol 54: 1209-1215, May 2016.

Kelly BJ, Lautenbach E, Nachamkin I, Coffin SE, Gerber JS, Fuchs B, Garrigan C, Han X, Bilker WB, Wise J, Tolomeo P, Han JH for the CDC Prevention Epicenters Program: Combined biomarkers discriminate a low likelihood of bacterial infection among surgical intensive care unit patients with suspected sepsis. Diag Microbiol Infect Dis 85: 109-15, May 2016.

Alby K., Nachamkin I.: Gastrointestinal Infections. Microbiology Spectrum. Hayden RT, Wolk DM, Carroll KC, Tang Y-W (eds.). 4(3): doi:10.1128 /microbiolspec.DMIH2-0005-2015, June 2016.

Rattanaumpawan P., Nachamkin I., Bilker WB., Roy JA., Metlay JP., Zaoutis TE., Lautenbach E.: Risk factors for ambulatory urinary tract infections caused by high MIC-fluoroquinolone susceptible E. coli in women: results from a large case-control study. J Antimicrob Chemother 70(5): 1547-51, May 2015.

Nachamkin I: Laboratory Developed Tests (LDTs). Pepper Talk (blog) Page: Dec 2015.

Han J., Nachamkin I., Coffin S., Gerber J., Fuchs B., Garrigan C., Han X., Bilker W., Wise J., Tolomeo P., Lautenbach E. : Use of a combination biomarker algorithm to identify medical intensive care unit patients with suspected sepsis at very low likelihood of bacterial infection. Antimicrobial Agents Chemother 59(10): 6494-6500, Oct 2015.

Sloan CE, Bernard S, Nachamkin I.: Appropriateness of Expectorated Sputum Cultures in the Hospital Setting. Diag Microbiol Infect Dis 83(1): 74-6, Sept 2015.

Cluzet VC, Gerber JS, Nachamkin I, Metlay JP, Zaoutis TE, Davis MF, Julian KG, Royer D, Linkin DR, Coffin SE, Margolis DJ, Hollander JE, Mistry RD, Gavin LJ, Tolomeo P, Wise JA, Wheeler MK, Bilker WB, Han X, Hu B, Fishman NO, Lautenbach E.: Duration of Colonization and Determinants of Earlier Clearance of Colonization with Methicillin-Resistant Staphylococcus aureus. Clin Infect Dis 60(10): 1489-96, May 2015.

Misic A., David MF., Tyldsley AS, Hodkinson BP, Tolomeo P, Hu B., Nachamkin I, Lautenbach E, Morris DO., Grice EA.: The shared microbiota of humans and companion animals as evaluated from Staphylococcus carriage sites. Microbiome 3(2): doi: 10.1186/s40168-014-0052-7, Jan 2015.

Garrigan C, Attela A, Poly F, Guerry P, Nachamkin I: Distribution of Campylobacter jejuni capsular types, 2007-2012, Philadelphia, PA. Diag Microbiol Infect Dis 80: 204-206, August 2014.

Cluzet VC, Nachamkin I., Tolomeo P., Lautenbach E.: Prevalence and epidemiology of murpirocin resistance among those colonized with MRSA in the community. ID Week (IDSA, SHEA), Oct 8-12, 2014, Philadelphia Oct 2014.

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Last updated: 11/05/2018
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