Jonathan Zenilman is a professor in the Infectious Diseases Division at Johns Hopkins University School of Medicine, where he has been on the faculty since 1989. He is a national authority on the clinical epidemiology and management of sexually transmitted diseases, HIV prevention, and infectious disease surveillance. He has served on advisory committees in these areas. Dr. Zenilman received his BA in chemistry from Cornell, his MD at SUNY Downstate, his internal medicine training at Kings County Hospital (New York), and his infectious diseases training at Emory.

Before coming to Johns Hopkins, Dr. Zenilman was an epidemic intelligence service officer at the CDC, where he developed the national gonococcal isolate surveillance project and was principal author of the 1989 STD Treatment Guidelines. Dr. Zenilman is the former director of the Baltimore City Health Department STD Program. His current research interests include STD epidemiology, development of HIV/STD prevention behavioral interventions, evaluation of new diagnostic tests for infectious disease, and the development of Internet-based distance education in infectious diseases and public health.

David Celentano received his ScD in behavioral science from Johns Hopkins University in 1977. He joined the Johns Hopkins University School of Public Health as an assistant professor and subsequently was promoted to the position of professor. Dr. Celentano holds joint appointments in the departments of Health Policy and Management and International Health. In 2001, Dr. Celentano was appointed the position of director of Infectious Diseases Programs in the Department of Epidemiology at the Bloomberg School.

Dr. Celentano has worked on a study which identifies epidemiologic risk factors for prevalent and incident HIV-1 infection among opiate users in Northern Thailand. In addition to collaborating on over 250 papers, Dr. Celentano is the principal investigator on a research study in Chiang Mai which addresses two HIV prevention needs:

Dr. Celentano has worked as a consultant for the following organizations and committees: Office of AIDS Research, National Institutes of Health; Centers for Disease Control and Prevention; Center for Scientific Review, National Institutes of Health; Scientific Advisor, Center for AIDS Prevention Studies, Behavioral Sciences Working Group, HIV Prevention Trials Network; Steering Committee, NIMH Collaborative HIV/STD Prevention Trial; Scientific Programme Committee. In addition to his responsibilities at Johns Hopkins, Dr. Celentano has teaching duties at the University of California, San Francisco, and at the University of Washington.

Jonathan Ellen is an associate professor of pediatrics for the Johns Hopkins University School of Medicine. He has extensive experience in STD research, specifically with adolescents and young adults. Dr. Ellen's current research in adolescents and young adults includes predictors of STD risk-related behavior (such as perceived risk) and the investigation of the role of sexual and social networks in the acquisition of STDs. He is also involved in a longitudinal study focusing on crowd-based cliques and risk behaviors, as well as a study focused on the health care utilization by HIV-infected female adolescents. In addition, he is conducting a multilevel study of the effects of neighborhood ecology on STD and pregnancy rates in Baltimore.

Dr. Ellen has conducted community-based public health interventions in San Francisco and Baltimore. He founded the YUTHE project; a peer-led community-based outreach program designed to increase the use of STD clinical services by youth. He developed the San Francisco Department of Public Health's youth-focused STD control program efforts. He currently directs the Baltimore City Health Department's Syphilis Elimination Program and the UJIMA Project. The Syphilis Elimination Program utilizes social and sex networking principles to direct activities. The UJIMA project, an HIV-prevention program focused on HIV-infected persons, uses a mobile van to find and test high-risk individuals.

Emily Erbelding is an associate professor of medicine and of pediatrics at the Johns Hopkins University School of Medicine, where she has been on the faculty since 1996. She is chief of clinical services for the Baltimore City Health Department STD Programs. Dr. Erbelding completed undergraduate studies at Cornell University, graduated from medical school at Indiana University, completed internal medicine training at Northwestern University Medical Center, and completed an infectious diseases fellowship and earned her MPH at Johns Hopkins.

Dr. Erbelding conducts research on the epidemiology of STDs and HIV, prevention of sequelae of STDs, and the development of HIV/STD prevention behavioral interventions. She has taught as a faculty member in the Region III STD/HIV Prevention Training Center for over 10 years.

Charlotte Gaydos is an associate professor in the Infectious Diseases Division at the Johns Hopkins University School of Medicine and the manager of the International Chlamydia Research Laboratory. She received her BS in medical technology and her MS in medical microbiology from West Virginia University. She earned her MPH and DrPH in infectious diseases and immunology at the Johns Hopkins Bloomberg School of Public Health.

Dr. Gaydos has extensive laboratory expertise, with over 30 years of experience in microbiology. For her doctorate she studied Chlamydia pneumoniae, and for the past 14 years she has continued to study chlamydia, performing original research developing DNA amplification tests for C. trachomatis, C. pneumoniae, and C. psittaci. She sequenced the 16S rRNA gene for C. pneumoniae and developed a polymerase chain reaction (PCR) assay specific for C. pneumoniae. She has studied many populations for the epidemiological association of C. pneumoniae, i.e., respiratory diseases, community-acquired pneumonia, and heart disease, and she has also performed primate animal studies with C. pneumoniae. All of these studies used analyses by culture, in situ hybridization, PCR, and serology (microimmunofluorescence).

Khalil Ghanem is a faculty member in the Department of Infectious Diseases at the Johns Hopkins University School of Medicine. He received his MD from Baylor College of Medicine, where he also trained in internal medicine. He completed a fellowship in infectious diseases at Johns Hopkins, and he is currently a PhD candidate in the Graduate Training Program in Clinical Investigation (GTPCI) at the Bloomberg School.

Dr. Ghanem's primary research interest is the effect of sex hormones on mucosal immune responses to sexually transmitted infections, including HIV. He is funded by the NIH to study the effects of hormonal contraceptives on both systemic and mucosal immune responses to Neisseria gonorrhoeae.

Patti Gravitt is an epidemiologist and laboratory scientist with a background in molecular diagnosis of viral infections, particularly genital human papillomaviruses. She received her MS in biology from the University of North Carolina at Charlotte and her PhD in epidemiology from the Johns Hopkins Bloomberg School of Public Health. Her dissertation topic was HPV Viral Load as a Co-Factor for Cervical Neoplastic Progression: Assessment of Temporality and Potential Misclassification of Viral Load.

Dr. Gravitt has developed the gold-standard method for PCR-based detection and genotyping of genital HPVs, as well as methods for viral quantitation and whole genome amplification. She has multiple publications on the molecular detection of HPV, as well as the epidemiology of HPV and cervical cancer. Her current research interests include the evaluation and development of molecular methods for cervical cancer screening, and identification of biomarkers of cervical neoplastic progression in the presence of HPV infection. Of particular interest is the role of chronic inflammation, pregnancy, and contraceptive use in the progression of HPV-associated cervical neoplasia. She is currently a co-principal investigator in a large, community-based cohort near Hyderabad, India, which is designed to evaluate the effectiveness of multiple screening strategies for cervical cancer, as well as the utility of various biomarkers of cervical cancer progression.

Thomas Quinn obtained his MD from Northwestern University. He became a research associate in infectious diseases in 1977-79 in the Laboratory of Parasitic Diseases, NIAID, and he completed a fellowship in infectious diseases at the University of Washington, Seattle, 1979-81. He is currently senior investigator and head of the section on international HIV-STD research in the Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health.

Dr. Quinn has been involved in HIV clinical and epidemiologic investigations in 25 countries, with current projects in Uganda, South Africa, Zimbabwe, Democratic Republic of the Congo, Ethiopia, India, China, and Brazil. Since 1981, he has been assigned to the Division of Infectious Diseases at the Johns Hopkins University School of Medicine, where he became professor of medicine in 1991. He also holds appointments in the Departments of Epidemiology, International Health, and Molecular Microbiology and Immunology. He is a fellow of the Infectious Disease Society of America, is a member of the American Association of Physicians (in addition to other professional organizations), and serves on numerous panels and editorial boards. He is an author on nearly 700 peer-reviewed publications.

Anne Marie Rompalo is a professor of medicine, epidemiology, and obstetrics and gynecology. She has published 50+ peer-reviewed articles and has first-authored/co-authored 11 book chapters. She is medical director of the CDC-sponsored Region III Sexually Transmitted Diseases (STD) / HIV Prevention Training Center (PTC), has previously held the position of acting medical director of the Baltimore City Health Department's STD Clinics, and has been principal investigator of the Baltimore site's HIV Epidemiology Research Study, a nine-year longitudinal observation study of HIV-infected women.

Dr. Rompalo has over eight years of experience as the medical director of the STD/HIV PTC, and she has over 15 years of experience as a lecturer in the field of STD and HIV. Dr. Rompalo has been an expert consultant and presenter for the 1998 and 2001 CDC STD Treatment Guidelines, developed curriculum for the National Network of Prevention Training Centers, was a consultant for the CDC's Program Operations Guidelines for STD Prevention, and is currently formulating the Health Resources and Services Administration's HIV/AIDS Bureau response to the national syphilis elimination plan.

M. Terry Hogan is the Administrator of the Region III STD/HIV Prevention Training Center (PTC), a training partnership among the Johns Hopkins Medical Institutions (JHMI), the Baltimore City Health Department (BCHD), and the Centers for Disease Control and Prevention (CDC). Ms. Hogan is an associate faculty member at the Bloomberg School, has done presentations for the JHU School of Nursing and other teaching institutions, and coordinates clinical training for the BCHD. She has more than 25 years of experience in the field of STI prevention and control. She serves on many advisory boards and committees, both locally and nationally. Ms. Hogan received her BA in sociology from Antioch College, her MPH in public health administration from Johns Hopkins University, and is currently a DrPH candidate at the Morgan State University Public Health Program.

Before coming to the PTC, Ms. Hogan was the epidemiologist for the Maryland State STD Program. In that capacity, she was designated as a departmental instructor responsible for training state and local health department personnel in basic epidemiology and outbreak response for infectious diseases. She incorporates her training expertise in the field of infectious diseases with an ongoing interest in adult education. In addition to teaching, her particular interest is in developing curricula that are based upon adult learning principles and incorporate appropriate teaching techniques, i.e., distance learning, practical case-based activities, and continuing evaluative feedback.