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7 United Nations Childrens Fund, United Nations University, World Health Organization. Iron deficiency anaemia: assessment, prevention, and control. A guide for programme managers. United Nations Childrens Fund, United Nations University, World Health Organization; 2001. Available at en/ida_assessment_prevention_control.pdf.

8. Weise Prinzo Z, de Benoist B. Meeting the challenges of micronutrient deficiencies in emergency affected populations. Proc Nutr Soc 2002;61:251-7.

9. Michaelsen KF, Weaver L, Branca F, Robertson A. Feeding and nutrition of infants and young children. [Chapter 6]. WHO Regional Publications European Series, No. 87:115.

10. Bhutta ZA, Ahmed T, Black RE, et al. What works? Interventions for maternal and child undernutrition and survival. Lancet 2008; 371:417-40.

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Electronic medical record (EMR) systems have the potential to improve reporting of notifiable diseases beyond ither traditional clinician-initiated or automated aboratory-based reporting systems. Traditional cliniciannitiated passive surveillance is burdensome to clinicians and often incomplete and delayed (1,2). Electronic laboatory reporting addresses these limitations (3,4) but often acks information needed for public health purposes (e.g., patient signs and symptoms, prescribed treatments, and ›regnancy status). Laboratory systems also do not integrate nultiple laboratory tests to satisfy a case definition. Many MRS, however, contain this information and store it in a orm that is amenable to electronic analysis and reporting. Consequently, EMR-based reporting has the potential to rovide active notifiable disease surveillance that is more imely, complete, and clinically detailed. This report summarizes findings from a pilot EMR-based electronic sureillance system in Massachusetts, which documented ncreases of 39% in reported chlamydia and 53% in eported gonorrhea for the period June 2006-July 2007, ompared with the existing passive surveillance system. ighty-one instances of pregnancy not identified by pasve surveillance were reported by the electronic system in atients with chlamydia or gonorrhea. In addition, the eleconic system identified 20 cases of pelvic inflammatory isease and four cases of acute hepatitis A, compared with one and one, respectively, reported via the passive system.

Improved reporting can help public health departments better allocate limited resources for targeted investigations and interventions.

The Massachusetts Department of Public Health, the Department of Ambulatory Care and Prevention at Harvard Medical School and Harvard Pilgrim Health Care, and Atrius Health collaborated under the auspices of the CDC Center of Excellence in Public Health Informatics at Harvard Pilgrim Health Care and Children's Hospital in Boston to create a system called Electronic Support for Public Health (ESP) (5). Atrius Health is a multispecialty group practice that provides primary care and outpatient specialty services to approximately 600,000 children and adults at 35 clinical facilities in eastern Massachusetts. ESP is designed to be compatible with most commercial EMR systems. Data on patient visits are exported from the EMR system to an independent ESP server every 24 hours. Transfer of data is an important aspect of ESP's compatibility with most EMR systems. Export of data also enables analysis without burdening the medical practice EMR system. The ESP server is secured behind the practice's electronic firewall to ensure the security of sensitive clinical information.

ESP was activated in January 2007 and populated with data beginning in June 2006. Data transferred from the EMR system to ESP include patient demographics, vital signs, test orders, test results, prescriptions, diagnostic codes, and health-care provider details. These data were regularly analyzed by ESP for evidence of four notifiable diseases: chlamydia, gonorrhea, pelvic inflammatory disease, and acute hepatitis A. Cases were defined on the basis of combinations of test orders, test results, medication prescriptions, and International Statistical Classification of Diseases and Related Health Problems, Ninth Revision (ICD-9) diagnostic codes. ESP case definitions were modeled after CDC surveillance definitions but limited to the coded data сарtured by EMRS (Table). When one of the four notifiable diseases was detected, ESP generated an electronic report and transmitted it to the state health department via the Internet. The report included the patient's name and contact information, clinician's name and contact information, disease diagnosed, laboratory test results, prescriptions, pregnancy status, and any patient symptoms that were inferred from ICD-9 codes in the electronic record. During the study period, the practice's conventional reporting continued routinely, independent of ESP, under the auspices of an infection-control practitioner in some facilities and through spontaneous clinician initiative in others. The practice's personnel were not informed of cases identified by ESP.

TABLE. Comparison of notifiable diseases definitions used by the Electronic Support for Public Health (ESP) system with CDC surveillance definitions Massachusetts, June 2006-July 2007

Disease Chlamydia


Pelvic inflammatory disease

Acute hepatitis A

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A case that meets the clinical case definition and occurs in

a person who has an epidemiologic link with a person who has laboratory-confirmed hepatitis A (i.e., household or sexual contact with an infected person during the 15-50 days before the onset of symptoms)

for Public Health (ESP): automated detection and reporting o

SOURCES: Klompas M, Lazarus R, Daniel J, et al. Electronic medical record Support statutory notifiable diseases to public health authorities. Adv Dis Surv 2007;3:3. CDC. Case definitions. Atlanta, GA: US Department of Health and Human Services, CDC; 2008. Available at casedef/case_definitions.htm.

* International Classification of Diseases, Ninth Revision.

For the period June 2006-July 2007, ESP reported 758 cases of chlamydia, 95 cases of gonorrhea, 20 cases of pelvic inflammatory disease, and four cases of acute hepatitis A. The charts of all cases identified by ESP were manually reviewed and matched with conventional, passive surveillance case reports in health department records. Compared with passive, paper-based reporting, ESP increased the number of chlamydia reports by 39% (758 cases versus 545) and gonorrhea by 53% (95 cases versus 62). In addition, ESP identified 20 cases of pelvic inflammatory disease cases, compared with none identified by passive surveillance, and four cases of acute hepatitis A, compared with one.

A total of six cases of chlamydia in health department records were not detected by ESP. Chart reviews revealed

five of these to be false positives. The one true case misse by ESP had been miscoded in the EMR system that fe data to ESP. All cases of gonorrhea, pelvic inflammator disease, and acute hepatitis A detected by passive survei lance also were identified by ESP.

All ESP case reports included patient treatment inform tion and pregnancy status. In contrast, passive surveilland reports included pregnancy status for 5% of cases and treat ment information for 88% of cases. ESP reported 81 cas of pregnancy in females with chlamydia or gonorrhea the were not noted on passive surveillance reports. Spellings patient names on passive surveillance reports were com pared with spellings in ESP data. Passive surveillan reports had a 5% rate of transcription errors, compare with no errors in ESP reports.

Reported by: M Klompas, MD, R Lazarus, MBBS, MPH, R Platt, MD, Dept of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care; X Hou, MSc, Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School; FX Campion, MD, B Kruskal, MD, PhD, Atrius Health and Harvard Medical School, Boston; G Haney, MPH, W Dumas, J Daniel, MPH, A DeMaria, MD, Massachusetts Dept of Public Health. SJN McNabb, PhD, Div of Integrated Surveillance Systems and Services, National Center for Public Health Informatics, CDC.

Editorial Note: This comparison of EMR-based detection and reporting of four notifiable diseases with traditional methods illustrates that automated, active surveillance using EMR data has the potential to improve public health monitoring by ensuring that cases are reported and by enhancing the timeliness, accuracy, and clinical detail of reports. Improved reporting can help public health departments better allocate limited resources for targeted investigations and interventions. For example, ESP has the potential to reliably identify high-priority cases for interwention, such as untreated chlamydia or gonorrhea in women who are pregnant. EMR-based surveillance and reporting also might support additional public health practices, such as populating immunization information systems or enabling statistical analyses for outbreak detection and nvestigation.

Currently, EMR-based surveillance cannot obviate the need for additional data collection by public health department personnel for certain cases. EMRS typically do not contain certain pieces of key epidemiologic data in a oded form that can be identified readily by electronic algorithms. Examples include case contacts, risky behavors, foreign travel, and relevant occupations (e.g., food andler or day care worker).

ESP complements the existing National Electronic Disases Surveillance System (NEDSS), established by CDC in 2001 to enable local and state health departments to send lectronic data to CDC for public health monitoring of otifiable conditions nationwide (6). NEDSS-compatible ystems currently operate in 38 states and the District of Columbia (7). ESP can facilitate electronic collection and ransmission of case reports from health-care providers to ocal and state public health departments, which in turn an use NEDSS-compatible systems to deliver summary ata to CDC.

Different strategies for implementing EMR-based case etection and reporting will need to be developed for diferent kinds of medical organizations. The stand-alone, erver-based implementation of ESP described in this eport is designed for large practices or health information xchanges. Incorporating ESP logic into commercial EMR

software or developing stand-alone ESP modules that can operate side by side with EMRs on clinicians' office-based computers also should be feasible. Source code for ESP is freely available (at under an open source license compatible with commercial development. Widespread implementation of electronic case detection and reporting is currently limited by the slow pace of adoption of EMRs by clinical practices, variation in coding practices among proprietary EMR systems, and an absence of standards for identifying cases using electronic data alone. As of 2006, only 29% of ambulatory medical practices were using EMR systems (8). In addition, the breadth of information collected by EMR systems varies substantially. EMRS that do not include prescription data, for example, limit the sensitivity and specificity of some electronic disease-detection algorithms (9). Further, different EMR systems use different proprietary coding systems. ESP does include tools to translate proprietary codes into standard nomenclatures; however, use of this translation requires customization for each system. Finally, existing case definitions for notifiable diseases (10) incorporate clinical descriptors such as "acute onset of symptoms" or "undue fatigue” or “jaundice" that are inconsistently noted on EMRS.

Development of ESP continues. The system has added reporting of acute hepatitis B, acute hepatitis C, and active tuberculosis. In addition, ESP's portability is being assessed by installing it in a regional health information exchange populated by a different EMR system. Meanwhile, development of electronic case definitions and widespread adoption of standard laboratory test nomenclatures, consensus lists of treatments, and standard reporting elements will facilitate more meaningful, comparable, and widespread electronic reporting of notifiable diseases.


This report is based, in part, on the contributions of J Dunn, MPH, Dept of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts. References

1. Doyle TJ, Glynn MK, Groseclose SL. Completeness of notifiable infectious disease reporting in the United States: an analytical literature review. Am J Epidemiol 2002;155:866–74.

2. Standaert SM, Lefkowitz LB Jr, Horan JM, Hutcheson RH, Schaffner W. The reporting of communicable diseases: a controlled study of Neisseria meningitidis and Haemophilus influenzae infections. Clin Infect Dis 1995;20:30-6.

3. Effler P, Ching-Lee M, Bogard A, leong MC, Nekomoto T, Jernigan D. Statewide system of electronic notifiable disease reporting from clinical laboratories: comparing automated reporting with conventional methods. JAMA 1999;282:1845–50.

4. Overhage JM, Grannis S, McDonald CJ. A comparison of the completeness and timeliness of automated electronic laboratory reporting and spontaneous reporting of notifiable conditions. Am J Public Health 2008;98:344-50.

5. Klompas M, Lazarus R, Daniel J, et al. Electronic medical record support for public health (ESP): automated detection and reporting of statutory notifiable diseases to public health authorities. Adv Dis Surv 2007;3:3.

6. National Electronic Disease Surveillance System Working Group. National Electronic Disease Surveillance System (NEDSS): a standardsbased approach to connect public health and clinical medicine. J Public Health Manag Pract 2001;7:43–50.

7. Trust for America's Health. Ready or not? Protecting the public's health from diseases, disasters, and bioterrorism 2007. Washington, DC: Trust for America's Health; 2007. Available at reports/bioterror07.

8. Hing ES, Burt CW, Woodwell DA. Electronic medical record use by office-based physicians and their practices: United States, 2006. Adv Data 2007;393:1-7.

9. Yokoe DS, Coon SW, Dokholyan R, et al. Pharmacy data for tuberculosis surveillance and assessment of patient management. Emerg Infect Dis 2004;10:1426-31.

10. CDC. Case definitions. Atlanta, GA: US Department of Health and Human Services, CDC; 2008. Available at disss/nndss/casedef/case_definitions.htm.

Notice to Readers

Introduction to Public Health

Surveillance Course

CDC and the Rollins School of Public Health at Emory University will cosponsor the course, Introduction to Public Health Surveillance, to be held May 19-23, 2008, at Emory University in Atlanta, Georgia. The course is designed for state and local public health professionals. Tuition is charged.

The course will provide practicing public health profes sionals with theoretical and practical knowledge to design, implement, and evaluate effective surveillance programs. Course topics include an overview and history of surveil lance systems; planning considerations; sources and collec tion of data; analysis, interpretation, and communication of data; surveillance systems technology; ethics and legalities; state and local concerns; and future considerations.

Additional information and applications are available from Emory University by mail (Hubert Global Health Dept.. 1518 Clifton Rd. NE, Rm. 746, Atlanta, GA 30322), by telephone (404-727-3485), by fax (404-727-4590), online (, or by e-mail


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From 1940 to 2005 (most recent data available), infant, nenonatal, and postneonatal annual mortality rates in the United States declined substantially. The infant mortality rate decreased 85%, from 47 infant deaths per 1,000 live births in 1940 to 6.87 in 2005. During the same period, substantial changes also occurred in the neonatal rate, which decreased 84%, from 28.8 to 4.54 deaths per 1,000 live births, and the postneonatal rate, which decreased 87%, from 18.3 to 2.34 deaths per 1,000 live births.

SOURCE: Kung HC, Hoyert DL, Xu J, Murphy SL. Deaths: final data for 2005. Natl Vital Stat Rep 2008;56(10). Available at

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