Katherine A. Ahrens

ahrens.katherine @gmail.com
6100 Executive Blvd. Bethesda, MD 20892

Education

2012Boston University
Ph.D. in Epidemiology
Dissertation title: Consequences of controlling viral infection during pregnancy: antiherpetic medication and influenza vaccination
Dissertation committee chair: Martha Werler
2004 University of Michigan
M.P.H. in Epidemiology
1999Harvard University
A.B. with honors in Biology

Research Positions

2012-present Postdoctoral Fellow
National Institutes of Health
Eunice Kennedy Shriver National Institute of Child Health & Human Development
Mentor: Enrique Schisterman
2009-2010 Research Analyst
Slone Epidemiology Center at Boston University
Supervisor: Martha Werler
2005-2008 Epidemiologist I
STD Prevention and Control Section
City and County of San Francisco
Supervisor: Jeff Klausner
2004 -2005 Epidemiologist I
STD Control Branch
State of California
Supervisor: Michael Samuels
2003 Research Intern
Lucile Packard Children's Hospital Vaccine Program
Stanford School of Medicine
Supervisor: Cory Dekker
2001 - 2002 Clinical Research Assistant
Substance Abuse Research Unit
Rhode Island Hospital
Supervisor: Michael Stein
2000 - 2001 Research Assistant
Ecosystems Center
The Marine Biological Laboratory
Supervisor: Knute Nadelhoffer
1999 Student Conservation Association Intern and AAUS SCUBA diver
Florida Marine Research Institute
Supervisor: Carolynn Cox

Teaching and Mentoring

2014

Certificate of training for completion of 9 week course Scientists Teaching Science from the
Office of Intramural Training & Education at the National Institutes of Health

2013 Summer Student Course, Organizer and Instructor
Eunice Kennedy Shriver National Institute of Child Health and Human Development
Division of Epidemiology, Statistics and Prevention Research
2013 Mentor
Maya Shimony, Summer Fellow, MPH Student
Epidemiology and Biostatistics Department, George Washington University
Project title: Sugar sweetened beverage consumption and liver damage biomarkers
2011 Teaching Assistant, Advanced Epidemiology
Boston University School of Public Health
2011 Teaching Assistant, Intermediate Epidemiology
Boston University School of Public Health
2006 Instructor, Introductory Epidemiology
Holy Names University
2002-2003 Graduate Student Instructor, Biology for Nonscientists
Primary Instructor: Josephine Kurdziel
Ecology and Evolutionary Biology Department
University of Michigan
2003 - 2004 Graduate Student Instructor, AIDS and Other Health Crises
Primary Instructor: Robert Bender
Ecology and Evolutionary Biology Department
University of Michigan

Awards and Scholarships

2013 Winner of Fellows Award for Research Excellence (FARE). National Institutes of Health, Office of Intramural Training and Development. Awarded travel scholarship to attend Society for Maternal and Fetal Medicine's Annual Meeting in February 2014.
2012 Selected for 2nd Annual Society for Epidemiologic Research (SER) Student Web Meeting presentation, November 17, 2012. Awarded travel scholarship to present at SER's annual meeting in Boston 2013.
2012 Member of the Delta Omega Society, a public health honorary society for students graduating in the top 10% of their class.
2011 Selected for participation at the National Institutes of Health
National Graduate Student Research Conference
October, Bethesda, Maryland
2008-2012 National Institutes of Health pre-doctoral training grant: Boston University Reproductive, Perinatal and Pediatric Epidemiology training program
(T32 HD052458).
2009 Selected for participation at the National Institute of Child Health & Human Development (NICHD) and Canadian Institutes of Health Research (CIHR)'s Summer Institute in Reproductive and Perinatal Epidemiology, Val-David, Quebec, Canada
2006 Selected for the Director's Service Award in recognition of outstanding contribution to the STD Prevention and Control Section, City and County of San Francisco, CA

Intramural Research Support

2014 Proposed study: Feasibility of Processing and Assaying Frozen Placental Specimens from the EAGeR Trial
Role: Principal Investigator
2013 Proposed study: The Impact of Diet, Exercise And Lifestyle on Fertility and Gynecologic Health Study (IDEAL), NICHD Intramural Research
PI: Sunni Mumford
Role: Supporting investigator
2011-2015 Folic Acid and Zinc Supplementation Trial (FAZST), NICHD Intramural Research
PIs: Enrique Schisterman, Sunni Mumford
Role: Supporting Investigator (2012-present)
2006-2012 Effects of Aspirin in Gestation and Reproduction Trial (EAGeR), NICHD Intramural Research
PI: Enrique Schisterman
Role: Supporting Investigator (2012-present)

Peer-Reviewed Publications

  1. Schliep KC, Mumford SL, Hammoud AO, Stanford JB, Kissell KA, Sjaarda LA, Perkins NJ, Ahrens KA, Wactawski-Wende J, Mendola P, Schisterman EF. Luteal phase deficiency in regularly menstruating women: prevalence and overlap in identification based on clinical and biochemical diagnostic criteria. JCEM, 2014 Feb 27:jc20133534. [Epub ahead of print].
  2. Pollack AZ, Sjaarda LA, Ahrens KA, Mumford SL, Browne RW, Wactawski-Wende J, Schisterman EF. Cadmium and lead exposure impair paraoxonase 1 (PON1) activity in premenopausal women. PLoS One, 01/2014; 9(3):e92152.
  3. Ahrens KA, Mumford SL, Schliep KC, Kissell KA, Perkins NJ, Wactawski-Wende J, Schisterman EF. The effect of serum leptin levels on reproductive hormones and the risk of sporadic anovulation. Am J Obstet Gynecol. 2013 Nov 8. pii: S0002-9378(13)02008-5. doi: 10.1016/j.ajog.2013.11.009.
  4. Ahrens KA, Vladutiu CJ, Mumford SL, Schliep KC, Perkins NJ, Wactawski-Wende J, Schisterman EF. The effects of physical activity across the menstrual cycle on reproductive function. Annals of Epidemiology. 2014 Feb; 24 (2): 127-134.
  5. Louik C, Ahrens K, Kerr S, Pyo J, Chambers C, Jones K, Schatz M, Mitchell A. Risks and safety of pandemic H1N1 influenza vaccine in pregnancy: exposure prevalence, preterm delivery and specific birth defects. Vaccine. 2013 Oct; 31 (44): 5033-50040
  6. Ahrens K, Anderka M, Feldkamp M, Canfield M, Mitchell A, Werler M. Antiherpetic medication use and the risk of gastroschisis: findings from the National Birth Defects Prevention Study. Paediatric and Perinatal Epidemiology. 2013 May; 27 (3): 258-262.
  7. Ahrens K, Lash TL, Louik C, Mitchell AA, Werler MM. Correcting for exposure misclassification using survival analysis with a time-varying exposure. Annals of Epidemiology. 2012 November; 22 (11):799-806.
  8. Werler MM, Ahrens KA, Bosco JLF, Mitchell AA, Anderka MT, Gilboa SM, Holmes LB and the National Birth Defects Prevention Study. Use of antiepileptic medications in pregnancy in relation to risks of birth defects. Annals of Epidemiology. 2011 November; 22 (11): 842-850.
  9. Ahrens K, Yazdy M, Mitchell AA, Werler MM. Folic acid intake and spina bifida in the era of dietary folic acid fortification. Epidemiology. 2011 May; 22 (5):731-737.
  10. Katz KA, Pillay A, Ahrens K, Kohn RP, Hermanstyne K, Bernstein KT, Ballard RC, Klausner JD. Molecular epidemiology of syphilis—San Francisco, 2004-2007. External Web Site PolicySex Transm Dis. 2010 Oct; 37(10); 660-663.
  11. Gertler S, Ahrens K, Klausner JD. Increased knowledge of safe and appropriate penicillin injection after viewing brief instructional video titled "How to Inject Bicillin LA". Sex Transm Dis. 2009 Mar; 36 (3); 147-148.
  12. Zetola NM, Bernstein K, Ahrens K, Marcus JL, Philip S, Nieri G, Jones D, Hare CB, Hsu L, Scheer S, Klausner JD. Using surveillance data to monitor entry into care of newly diagnosed HIV-infected persons: San Francisco, 2006-2007. BMC Public Health. 2009 Jan 14; 9:17.
  13. Scott KC, Philip S, Ahrens K, Kent CK, Klausner JD. High prevalence of gonococcal and chlamydial infection in men who have sex with men with newly diagnosed HIV infection: an opportunity for same-day presumptive treatment. J Acquir Immune Defic Syndr. 2008 May 1; 48 (1):109-112.
  14. Philip SS, Ahrens K, Shayevich C, de la Roca R, Williams M, Wilson D, Bernstein K, and Klausner JD. Evaluation of a new point-of-care serologic assay for herpes simplex virus type 2 infection. Clin Infect Dis. 2008 Nov 15; 47(10):e79-82.
  15. Liu AY, Kittredge PV, Vittinghoff E, Raymond HF, Ahrens K, Matheson T, Hecht J, Klausner JD, Buchbinder SP. Limited knowledge and use of HIV post- and pre-exposure prophylaxis among gay and bisexual men. J Acqui Immune Defic Syndr. 2008 Feb 1; 47(2):241-247
  16. Ahrens K, Kent CK, Kohn RP, Nieri G, Reynolds A, Philip S, Klausner JD. HIV partner notification outcomes for HIV-infected patients by duration of infection, San Francisco, 2004 to 2006. J Acqui Immune Defic Syndr. 2007 Dec 1; 46(4):479-484
  17. Moss N, Harper C, Ahrens K, Scott K, Padian N, Raine T, Klausner JD. Predictors of incident herpes simplex virus type 2 infections in young women at risk for unintended pregnancy in San Francisco. BioMed Central Infectious Diseases. 2007 Sep 26; 7:113.
  18. Papp J, Ahrens K, Phillips C, Kent CK, Philip S, Klausner JD. The use and performance of oral-throat rinses to detect pharyngeal Neisseria gonorrhoeae and Chlamydia trachomatis infections. Diagn Microbiol Infect Dis. 2007 Nov; 59(3):259-264.
  19. Vaudrey J, Raymond HF, Chen S, Hecht J, Ahrens K, McFarland W. Indicators of use of methamphetamine and other substances among men who have sex with men, San Francisco, 2003 – 2006. Drug Alcohol Depend. 2007 Sep 6; 90(1):97-100.
  20. Ahrens K, Bradbury KJ, Bauer HM, Samuel MC, Gould G, Donatoni G, Higgins C, Kerndt P, Bolan G. Trends in the use of sexually transmitted disease diagnostic technologies in California, 1996-2003. Sex Transm Dis. 2007 Jul; 34(7):513-518.
  21. Strona FV, McCright J, Hjord H, Ahrens K, Tierney S, Shoptaw S, Klausner JD. The acceptability and feasibility of the positive reinforcement opportunity project, a community-based contingency management methamphetamine treatment program, in gay and bisexual men, San Francisco. Journal of Psychoactive Drugs. 2006 November SARC Suppl 3: 377-381.
  22. Ahrens K, Kent CK, Montoya JA , Rotblatt H, McCright J, Kerndt P, Klausner JD. Healthy Penis: San Francisco's social marketing campaign to increase syphilis testing among gay and bisexual men. 2006 PLoS Medicine Vol. 3, No. 12.

Invited Commentaries

  1. Ahrens K, Schisterman EF. A time and place for causal inference methods in perinatal and paediatric epidemiology: commentary. Paediatric and Perinatal Epidemiology. 2013 July; 27 (4): 340-345.

Book Chapters

  1. Klausner JD and Ahrens KA. Health Communication and Surveillance Case Study: A Healthy Response to Increases in Syphilis—The San Francisco Healthy Penis Campaign. Eds: M'ikanatha, Lynfield, Van Beneden and de Valk: Infectious Disease Surveillance 1st edition 2007. Blackwell Publishing, Malden, Massachusetts.
  2. Klausner JD and Ahrens KA. Health Communication and Surveillance Case Study: A Healthy Response to Increases in Syphilis—The San Francisco Healthy Penis Campaign. Eds: M'ikanatha, Lynfield, Van Beneden and de Valk: Infectious Disease Surveillance 2nd edition 2013. Blackwell Publishing, Malden, Massachusetts.

Other Publications

  1. Ahrens K. Consequences of controlling for viral diseases during pregnancy: antiherpetic medication and influenza vaccination. A doctoral dissertation submitted to the Faculty of the Graduate School of Arts and Sciences at Boston University, May, 2012.
  2. Moss NJ, Ahrens K, Kent CK, Klausner JD. Letter to the Editor: The decline in clinical sequelae of genital Chlamydia trachomatis infection supports current control strategies. J Infect Dis. 2006 May 1: 193(9): 1336-1338.

Manuscripts Under Review and In Preparation

Ahrens KA, Kerr S, Louik C, Mitchell AA, Werler MM. Influenza vaccination during pregnancy and the risks of preterm and small for gestational age (SGA) birth, under review.

Schliep KC, Mumford SL, Vladutiu CJ, Ahrens KA, Perkins NJ, Prasad A, Wactawski-Wende J, Schisterman EF. Perceived stress, reproductive hormones, and ovulatory function among premenopausal women in the BioCycle Study, under review.

Prasad A, Mumford SL, Buck Louis GM, Ahrens KA, Sjaarda LA, Schliep KC, Perkins NJ, Kissell KA, Wactawski-Wende J, Schisterman EF. Sexual activity and its effect on endogenous reproductive hormones and ovulation, under review.

Kissell KA, Danaher M, Schisterman EF, Wactawski-Wende J, Ahrens KA, Schliep KC, Perkins JN, Sjaarda LA, Mumford SL. Serum anti-Mullerian hormone variation throughout the menstrual cycle in healthy regularly menstruating women, under review.

Ahrens KA, Cole SR, Westreich D, Platt RW, Schisterman EF. A cautionary note about estimating effect of secondary exposures in cohort studies, in preparation.

Silver RM, Ahrens KA, Perkins NJ, Wong L, Galai N, Lesher LL, Faraggi D, Wactawski-Wende J, Townsend JM, Lynch AM, Mumford SL, Schisterman EF. Preconception low dose aspirin and pregnancy outcomes: findings from the EAGeR (Effects of Aspirin in Gestation and Reproduction) randomized trial, in preparation.

Ahrens KA, Silver RM, Perkins NJ, Wong L, Galai N, Lesher LL, Faraggi D, Wactawski-Wende J, Townsend JM, Lynch AM, Mumford SL, Schisterman EF. Preconception low dose aspirin and adverse events: findings from the EAGeR (Effects of Aspirin in Gestation and Reproduction) randomized trial, in preparation.

Schisterman EF, Perkins NJ, Mumford SL, Ye A, Ahrens KA. Collinearity: should we worry about it in epidemiologic research? in preparation.

Kissell KA, Danaher M, Schisterman EF, Wactawski-Wende J, Schliep KC, Perkins JN, Sjaarda LA, Ahrens KA, Mumford SL. The association between anti-Mullerian hormone levels and follicular phase length, in preparation.

Shimony MK, Mumford SL, Schliep KC, Ahrens KA, Sjaarda LA, Rotman Y, Perkins JN, Pollack AZ, Wactawski-Wende J, Schisterman EF. The relationship between sugar consumption and liver enzymes in among reproductive aged women, in preparation.

Professional Activities

Co-organizer NICHD Epidemiology and Reproductive Endocrinology & Infertility Joint Journal Club
2013-2014, NICHD Division of Intramural Population Health Research Epidemiologic Methods Club 2013-2014
Reviewer American Journal of Epidemiology, Public Library of Science (PLoS), Sexually Transmitted Diseases Journal, HIV Clinical Trials, European Journal of Clinical Nutrition, Environmental Health Perspectives, Paediatric and Perinatal Epidemiology
Member Society for Epidemiologic Research (Abstract reviewer: 2013, 2014)
Society for Pediatric and Perinatal Epidemiologic Research (Abstract reviewer: 2012, 2013, 2014)

Presentations

Invited Talks and Seminars

2014 Preconception low dose aspirin and adverse events: findings from the EAGeR (Effects of Aspirin in Gestation and Reproduction) randomized trial
Reproductive Endocrinology and Infertility Research in Progress Seminar Series
National Institutes of Health
April, Bethesda, MD
2013 The effect of serum leptin levels on reproductive function
Reproductive Endocrinology and Infertility Research in Progress Seminar Series
National Institutes of Health
July, Bethesda, MD
2012 Consequences of controlling viral diseases during pregnancy: antiherpetic medicationand influenza vaccination
Slone Center for Epidemiology Brown Bag Seminar Series
May, Boston, MA
2011 Influenza vaccination before and during pregnancy and the risk of preterm birth.Advanced methods student workshop on bias analysis with Dr. Timothy Lash.
Society for Pediatric and Perinatal Epidemiologic Research Annual Meeting
June, Montreal, Quebec, Canada
2011 Influenza vaccination before and during pregnancy and the risk of preterm birth
Colby College Mathematics and Statistics Department Spring Colloquium Series
March, Waterville, ME
2009 Use of antiepileptic medications in pregnancy in relation to risks of birth defects
National Birth Defects Prevention Study Webinar
Centers for Disease Control and Prevention.
November

Oral and Poster Presentations

1) 2014 Ahrens KA, Silver RM, Perkins NJ, Wong L, Galai N, Lesher LL, Faraggi D, Wactawski-Wende J, Townsend JM, Lynch AM, Mumford SL, Schisterman EF. Preconception low dose aspirin and pregnancy outcomes: findings from the EAGeR (Effects of Aspirin in Gestation and Reproduction) randomized trial.
Oral presentation.
Society for Maternal-Fetal Medicine
February, New Orleans, Louisiana
2) 2013 Louik C, Ahrens KA, Kerr S, Pyo J, Chambers C, Jones KL, Schatz M, Mitchell AA. Risks and safety of pandemic H1N1 vaccine in pregnancy: preterm birth and specific defects. Poster presentation.
International Society for Pharmacoepidemiology
August, Montreal, Canada
3) 2013 Ahrens KA, Mumford SL, Schliep KC, Perkins NJ, Wactawski-Wende J, Schisterman EF. Marginal structural models for continuous exposures in the longitudinal setting:
an application to reproductive epidemiology. Oral presentation.
Society for Epidemiologic Research Annual Meeting
June, Boston, MA
4) 2013 Ahrens KA, Vladutiu CJ, Mumford SL, Schliep KC, Perkins NJ, Wactawski-Wende J, Schisterman EF. The effect of physical activity during the menstrual cycle on reproductive function. Poster presentation.
Society for Perinatal and Reproductive Epidemiologic Research
June, Boston, MA
5) 2013 Ahrens KA, Mumford SL, Kissell KA, Schliep KC, Perkins NJ, Wactawski-Wende J, Schisterman EF. The effect of serum leptin levels on reproductive hormones and the risk of sporadic anovulation. Poster presentation.
Society for Perinatal and Reproductive Epidemiologic Research
June, Boston, MA
6) 2013 Schliep KC, Mumford SL, Vladutiu CJ, Ahrens KA, Perkins NJ, Prasad A, Sjaarda LA, Kissell KA, Wactawski-Wende J, Schisterman EF. Perceived stress, reproductive hormones, and ovulatory function among premenopausal women in the BioCycle Study. Oral presentation.
Society for Perinatal and Reproductive Epidemiologic Research
June, Boston, MA
7) 2013 Prasad A, Mumford SL, Buck Louis GM, Ahrens KA, Sjaarda LA, Schliep KC, Perkins NJ, Kissell KA, Wactawski-Wende J, Schisterman EF. Sexual activity and its effect on endogenous reproductive hormones and ovulation. Poster presentation.
Society for Perinatal and Reproductive Epidemiologic Research
June, Boston, MA
8) 2013 Kissell KA, Danaher M, Schisterman EF, Wactawski-Wende J, Schliep KC, Perkins NJ, Sjaarda LA, Ahrens KA, Mumford SL. The association between anti-Mullerian hormone levels and follicular phase length. Poster presentation.
Society for Epidemiologic Research
June, Boston, MA
9) 2013 Kissell KA, Danaher M, Schisterman EF, Wactawski-Wende J, Schliep KC, Perkins NJ, Sjaarda LA, Ahrens KA, Mumford SL. Serum anti-Mullerian hormone variation throughout the menstrual cycle in healthy regularly menstruating women. Oral presentation.
The Endocrine Society
June, Boston, MA
10) 2013 Pollack AZ, Sjaarda LA, Ahrens KA, Mumford SL, Browne R, Wactawski-Wende J, Schisterman EF. Cadmium and lead exposure impair paraoxonase 1 (PON1) activity in premenopausal women. Poster presentation.
Society for Epidemiologic Research
June, Boston, MA
11) 2012 Marginal structural models for continuous exposures in the longitudinal setting: an application to reproductive epidemiology. Oral presentation.
Society for Epidemiologic Research 2nd Annual Student Web Meeting
November
12) 2012 Ahrens KA, Anderka MT, Feldkamp ML, Canfield MA, Mitchell AA, Werler MM. Antiherpetic medication use and the risk of gastroschisis. Poster presentation.
Society for Pediatric and Perinatal Epidemiologic Research
June, Minneapolis, MN
13) 2012 Ahrens KA, Louik C, Mitchell AA, Werler MM. Influenza vaccination during pregnancy and the risk of small for gestational age (SGA) birth. Poster Presentation.
Society for Pediatric and Perinatal Epidemiologic Research
June,Minneapolis, MN
14) 2011 Ahrens K, Louik C, Mitchell AA, Hochberg, NS, LaValley M, Applebaum KM. Prenatal influenza vaccination and the risks of preterm and small for gestational age (SGA) birth. Poster presentation.
National Graduate Student Research Conference
October, Bethesda, MD
15) 2010 Ahrens K, Yazdy M, Mitchell AA, Werler MM. Folic acid intake and spina bifida in the era of dietary folic acid fortification. Oral presentation.
Society for Pediatric and Perinatal Epidemiologic Research
June, Seattle, WA
16) 2008 Philip S, Ahrens K, Bernstein K, Klausner JD. Performance of a new rapid herpes simplex virus type 2 fingerstick assay in an urban STD clinic. Oral presentation.
BASHH / ASTDA
May, Brooklyn, NY.
17) 2008 Bernstein K, Ahrens K, Philip S, Klausner JK. Rectal STD re-infections increase risk of HIV seroconversion. Oral presentation.
BASHH / ASTDA
May, Brooklyn, NY
18) 2008 Bernstein KT, Ahrens K, Philip S, Klausner JK. Factors associated with concurrent sexual partnerships among men who have sex with men (MSM). Oral presentation.
National Sexually Transmitted Diseases Prevention Conference
March, Chicago, IL
19) 2008 Philip S, Ahrens K, Bernstein KT and Klausner JD. Rates of repeat testing among patients diagnosed with chlamydia and gonorrhea at a public STD clinic: San Francisco 2005-2006
National Sexually Transmitted Diseases Prevention Conference. Oral presentation.
March, Chicago, IL
20) 2008 Newman L, Ahrens K, Bissette J, Datta D, Kerani R, Klingler E, Kohn R, Martins S,  Rietmeijer K, Weinstock H. Monitoring genital wart disease in STD clinics through the STD Surveillance Network (SSuN). Oral presentation.
National Sexually Transmitted Diseases Prevention Conference
March, Chicago, IL
21) 2007 Klausner JD, Philip S, Ahrens K, Nieri N, Kohn R, Louie B, Wong E, Liska S. Combined rapid and HIV RNA testing in a public STD clinic, San Francisco, 2004–2006  HIV Diagnostics Conference. Oral presentation.
December, Atlanta, GA
22) 2007 Goldsmith J, Faruki H, Smith R, Richardson M, Zetola N, Ahrens K, Klausner J. High throughput donor plasma NAT screening assay applied to acute HIV detection in a public health setting. Poster presentation.
HIV Diagnostics Conference
December, Atlanta, GA
23) 2007 Klausner JD, Winters M, Ahrens K, Balamane M, Rowniak S, De La Roca R, Israelski D, Katzenstein D. Oral fluid specimens for the detection of acute HIV infection. Oral presentation.
HIV Diagnostics Conference
December, Atlanta, GA
24) 2007 Ahrens K, Kent CK, Nieri G, Philip S, Klausner, JD. Monitoring entry into primary care for newly diagnosed HIV-infected persons: San Francisco, 2006. Oral presentation.
HIV Diagnostics Conference
December, Atlanta, GA
25) 2007 Barry PM, Kent CK, Ahrens K, Klausner JD. Risk factors for gonorrhea among heterosexuals – San Francisco, 2006. Poster presentation.
International Society for Sexually Transmitted Disease Research
July, Seattle, WA
26) 2007 Scott K, Philip S, Ahrens K, Kent CK, Klausner JD. High prevalence of gonococcal and chlamydial infection in men who have sex with men with newly diagnosed HIV infection: An opportunity for same day presumptive treatment. Poster presentation.
International Society for Sexually Transmitted Disease Research
July, Seattle, WA
27) 2007 Schumacher CM, Kent CK, Ahrens K, Klausner JD, Zenilman JM. Substantial prevalence of gonococcal and chlamydial infections among MSM with early syphilis and their sex partners:  San Francisco, 2002-2005. Poster presentation.
International Society for Sexually Transmitted Disease Research
July, Seattle, WA
28) 2007 Barry PM, Ahrens K, Roger A, Greenwood G, Schachter S, Richardson D, Rietmeijer C, Klausner JD. Prevalence and incidence of Mycoplasma genitalium and Trichomonas vaginalis infections among STD clinic patients determined by transcription mediated amplification- San Francisco and Denver, 2004 – 2005. Poster presentation.
International Society for Sexually Transmitted Disease Research
July, Seattle, WA
29) 2007 Ahrens K, Kent CK, Kellogg T, Philip S, Klausner JD. Methamphetamine and erectile dysfunction drug use associated with chlamydial and gonococcal infections in HIV-uninfected gay and bisexual men: San Francisco, 2006 – 2007. Poster presentation.
International Society for Sexually Transmitted Disease Research
July, Seattle, WA
30) 2007 Ahrens K, Kent CK, Kohn RP, Goldenson J, Klausner JD. High titer syphilis seroreactivity data in correctional settings more accurately monitors syphilis trends in a city with low syphilis rates among heterosexuals: San Francisco, 1997 – 2006. Poster presentation.
International Society for Sexually Transmitted Disease Research
July, Seattle, WA
31) 2007 Scott K, Kent CK, Ahrens K, Philip S, Klausner JD. Chlamydial and gonococcal infection among gay and bisexual men at time of HIV positive test result: implications for co-treatment, San Francisco 2004-2006.  Oral presentation.
Conference on Retroviruses and Opportunistic Infections
February, Los Angeles, CA
32) 2007 Ahrens K, Kent CK, Nieri G, Kohn R, Klausner JD. HIV partner notification outcomes for HIV-infected patients by duration of infection, San Francisco 2004 — 2006.  Poster presentation.
Conference on Retroviruses and Opportunistic Infections
February, Los Angeles, CA
33) 2007 Klausner JD, Philip S, Ahrens K, Nieri G, Kohn R, Liska S, Louie B, Wong E, Kent CK. Combined rapid and HIV RNA testing in a public STD clinic, San Francisco, 2004-2006. Poster presentation.
Conference on Retroviruses and Opportunistic Infections
February, Los Angeles, CA
34) 2007 Zetola NM, Ahrens K, Kent CK, Truong HM, Grant RM, Dilley J, Klausner, JD.  Surveillance for transmitted drug-resistance in sentinel-sites: San Francisco 2005-2006. Poster presentation.
Conference on Retroviruses and Opportunistic Infections
February, Los Angeles, CA
35) 2006 Papp JR, Ahrens K, Philips C, Farshy C, Kent CK, Klausner JD. The performance of oral rinses as a novel approach to detect pharyngeal Neisseria gonorrhoeae and Chlamydia trachomatis Infections. Oral presentation.
International Union against Sexually Transmitted Diseases
October, Versailles, France
36) 2006 Francis SC, Kent CK, Rauch L, Ahrens K, Kohn R, Hardick A, Klausner JD, Gaydos CA. Prevalence of rectal Mycoplasma genitalium and Trichomonas vaginalis in rectal specimens among gay male patients at the San Francisco STD Clinic, 2005-2006. Poster presentation.
Infectious Disease Society of America
October, Toronto, Canada
37) 2006 Kent CK, Ahrens K, Nakao JH, Liska S, Klausner JD. Substantial prevalence of rectal chlamydia and gonorrhea in a variety of venues providing services to men who have sex with men - San Francisco, 2005. Poster presentation.
International AIDS Conference
August, Toronto, Canada
38) 2006 Philip S, Ahrens K, Nieri G, Kohn R, Liska S, Louie B, Kent CK, Klausner JD. State-of-the-art HIV testing—Combined rapid and HIV RNA testing in a public STD clinic, San Francisco, 2004-2005. Poster presentation.
International AIDS Conference
August, Toronto, Canada
39) 2006 Kent CK, Nieri G, Ahrens K, Klausner JD. Effective HIV partner counseling and referral services (PCRS): San Francisco, 2004 - 2005. Poster presentation.
International AIDS Conference
August, Toronto, Canada
40) 2006 Liu A, Wheeler S, Vittinghoff E, Raymond HF, Ahrens K, Klausner JD, Buchbinder S. Low levels of pre-exposure prophylaxis awareness and use among HIV-negative/unknown gay/bisexual men: San Francisco Bay Area residents, circuit party attendees, and clients of an urban STD clinic. Poster presentation.
International AIDS Conference
August, Toronto, Canada
41) 2006 Kent CK, Ahrens K, Courtney JG, Kellogg T, Schwarcz S, Liska S, Klausner JD. Rectal chlamydial and gonococcal infections are common and have a substantial impact on HIV incidence among men who have sex with men in San Francisco. Poster presentation.
International AIDS Conference
August, Toronto, Canada
42) 2006 Levine D, Scott K, Ahrens K, Kent CK, Klausner JD. InSPOT.org: A unique online partner notification system. Oral presentation.
National Sexually Transmitted Diseases Prevention Conference
May, Jacksonville, FL
43) 2006 Philip S, Kohn R, Ahrens K, Wong E, Kent CK, Klausner JD. Trends in herpes culture testing over eleven years at an urban STD clinic: San Francisco, 1995-2005. Poster presentation.
National Sexually Transmitted Diseases Prevention Conference
May, Jacksonville, FL
44) 2006 Strona FV, Tierney S, Stansell J, Kahn J, Gibson S, Cabaj B, Pendo M, Hare B, Siever M, McCright J, Ahrens K, Shoptaw S, King WD, Reback CJ, Dang J, Klausner JD. Positive reinforcement opportunity project (PROP): new treatment for MSM who use methamphetamine. Poster presentation.
National Sexually Transmitted Diseases Prevention Conference
May, Jacksonville, FL
45) 2006 Moss N, Harper C, Ahrens K, Kent CK, Scott K, Kao S, Liska S, Rocca C, Fisher R, Padian N, Raine T, Darney P, Klausner JD. Predictors and pregnancy in incident herpes simplex type 2 infection in young women using community clinics. Poster presentation.
National Sexually Transmitted Diseases Prevention Conference
May, Jacksonville, FL
46) 2006 Moss N, Harper C, Ahrens K, Kent CK, Scott K, Kao S, Liska S, Rocca C, Fisher R, Padian N, Raine T, Darney P, Klausner JD. Predictors of incident genital infection with Chlamydia trachomatis in young women using community clinics in San Francisco. Poster presentation.
National Sexually Transmitted Diseases Prevention Conference
May, Jacksonville, FL
47) 2006 Ahrens K, Kent CK, McCright J, Montoya JA, Rotblatt H, Kerndt P, Klausner JD. Healthy Penis 2004: evaluation of a social marketing syphilis prevention campaign, San Francisco, CA. Poster presentation.
National Sexually Transmitted Diseases Prevention Conference
May, Jacksonville, FL
48) 2006 Ahrens K, Nieri G, Philip S, Kohn RP, Liska S, Wong EH, Louie B, Kent CK, Klausner JD. Comprehensive HIV testing services in an STD Clinic: standard antibody, rapid antibody, and HIV RNA testing. Poster presentation.
National Sexually Transmitted Diseases Prevention Conference
May, Jacksonville, FL
49) 2006 Reynolds A, Ahrens K, Philip S, Kohn RP, Kent CK, Klausner JD. Nonoccupational postexposure prophylaxis (PEP) against HIV following high-risk exposure. Poster presentation.
National Sexually Transmitted Diseases Prevention Conference
May, Jacksonville, FL
50) 2006 Ahrens K, Schwarcz S, Kent CK, Kohn RP, Klausner JD. Trends in HIV incidence among men who have sex with men, San Francisco, 2001-2004. Poster presentation. National Sexually Transmitted Diseases Prevention Conference
May, Jacksonville, FL
51) 2006 Papp JR, Ahrens K, Philips C, Farshy C, Kent CK, Klausner JD. Assessment of commercial mouthwash as a novel approach to detect pharyngeal Neisseria gonorrhoeae infections. Late-breaker poster presentation.
National Sexually Transmitted Diseases Prevention Conference
May, Jacksonville, FL