Dr Amna Rehana Siddiqui Department of Family and Community Medicine

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Presentation transcript:

Dr Amna Rehana Siddiqui Department of Family and Community Medicine Disease Notification Dr Amna Rehana Siddiqui Department of Family and Community Medicine

objectives At the end of session participants will be able to Describe the disease notification process for major infectious diseases including mortality Classify the types of reporting mechanisms Justify the role of ministry of health / department of health in disease notification system

Background The communicable disease control requires: Understanding of the epidemiology of diseases Reliable data on its distribution. Once an infectious disease listed to be reported or a new disease has been detected (or suspected) it should be notified to the local health authority, whose responsibility is to put into operation, control and preventive measures.

Background: Control of Communicable diseases The first step prompt recognition & identification Reporting to a higher level remains the first line of alertness All health care workers should be aware of diseases that need to be reported as well as how, why & where they are to be reported.

Background Administrative practices on diseases reporting may vary greatly from one country or region to another. Disease reporting provides necessary and timely information to justify the application of appropriate investigation and control measures . Uniformity in morbidity and mortality reporting allow comparison of data from different time periods, regions, and nations.

A reporting system functions in four stages Collection of basic data in the local community where disease occurs. Data are next assembled at district, state or province level. Aggregation of information under national systems. For certain diseases, reporting is made by the national health authority to the WHO.

Reporting System in Saudi Arabia:- Reporting system of communicable diseases passed through various stages since 1953G/1353H Modifications had been undertaken where reporting was urged to be implemented more seriously and the diseases were classified into two main classes.

Reporting System in Saudi Arabia:- Class I: Included quarantinable diseases such as Cholera, Plague and Yellow fever and other communicable diseases such as Poliomyelitis and Cerebrospinal meningitis of various origins as well as other diseases.

Reporting System in Saudi Arabia:- Diseases under class 1 should be reported immediately from hospitals, to the responsible health care center to regional health affair directorate and eventually to the Ministry of Health by telephone, fax or most rapid means. The diseases should be reported to the general directorate of preventive medicine by fax.

Reporting System in Saudi Arabia:- Class II: Diseases included this class should be reported weekly from the assigned health care center to the regional health affair directorate and then monthly from the latter to the general directorate of preventive medicine in the Ministry of Health. This class include communicable diseases which are closely related to environmental health e.g. Typhoid, Amoebic dysentery, hepatitis, and other diseases, please see table in next slides.

* * In Big Cities PHC can report directly to Directorate of Health

Surveillance, Survey & daily reporting Surveillance (WHO, state, health department,hospital, decide) Continuous; frequency of reporting scheduled Monitor long term trends To make comparisons Demands on maintaining quality of data Survey (WHO, state, health department, hospital, decide) one time activity/ prevalence survey/to know burden Repeated surveys / yearly / quarterly Daily reporting A structured format: to report to infection control department If new emerging infectious disease of fatal nature then health department need to be notified daily or per decision

Disease notification Legal responsibility of public & privately functional/working Physicians Laboratories Hospitals Health centers Others Immediately reporting can be done by fax with sufficient information for the health department to trace and take actions to confirm the case; and control further Within a hospital infection control department assists in collecting information to process to health department Passive type of surveillance

Disease notification Instituted for rapid application of prevention measure List of diseases vary by country Notification goes by mail Information on form includes dx, date of onset, age, sex, and place of residence; may contain Sx, Rx given, and precautions It is done to control and prevent people in homes, clinics, hospitals, villages, towns, cities, countries, and at global level too.

Validity of notification data Seeking of medical care is not constant Distance to the nearest hospital Cost and distance to travel Media reports will increase the # of people reporting to the hospital e.g. dengue fever Public awareness will increase the incidence

Case Definition Standard set of criteria Clinical and lab Allows for comparison Sensitive vs. Specific New diagnostic tests will increase incidence

Case Definition Example Probable Case of Smallpox A case that meets the clinical case definition that is not laboratory confirmed but has an epidemiological link to another confirmed or probable case. Confirmed Case of Smallpox A case of smallpox that is laboratory confirmed.

Case Definition Gradient Low Specificity High Specificity Suspected Probable Confirmed

DEATH: Assigning Cause on certificate under-registration (of death) (especially where where registration facilities are minimal). The exact determination of the cause of death is one of the most difficult problems of vital statistics .

The WHO standard death certificate: Disease/condition directly leading to death e.g. peritonitis. Antecedent causes e.g. perforation of duodenum. Morbid conditions if any, giving rise to above cause e.g. duodenal ulcer. Other significant conditions, contributing to death but not related to the disease, or condition causing it … e.g. hypertension.

Importance of Death Certificate: Enables the underlying causes of death to be assigned to its proper category in the (ICD). The WHO consider this classification as one of the great advances in the field of vital statistics. It enables international comparative studies. Death from acute infections of short durations act like incidence of disease ICD: International Classification system of diseases

Summary Disease notification requires an inbuilt surveillance system between health care workers/services and government Case definitions / cause of death assignment Prompt action as soon as notification arrives Control measures to be considered for health care services, community, employees, and determining target or high risk groups

Exercises Divide the class into groups ; that work on following scenarios; How to address a new infectious disease epidemic, that was not endemic in the region/setting? How to notify infectious diseases from admitted patients? How to notify infectious diseases from outpatients? How to notify infectious diseases in medical professionals /occupational hazards medical profession? How to notify infectious diseases from laboratory ? How to report needle stick injuries in health workers of a hospital? How to report a suspected case of polio to health department ? How to handle a case of suspected Enteric Fever in hospital cafeteria cook? Each group presents its worked out response in front of class