Epidemiology module of practical skills for mbbs student
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03.01.2022
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Active Surveillance:
implies the collection
of data on specific VPDs
, through the review of records during regular visits
to selected health facilities
,
reporting sites or the
community.
This method is used
ƒ During outbreaks to determine the extent of the outbreak and keep mortality rates low by initiating early treatment.
ƒ When a disease is targeted for eradication or elimination (e.g. polio eradication) every possible case must be found and investigated.
Active Surveillance does not
replace passive surveillance
, but if conducted regularly and frequently it has the following advantages
over passive surveillance
, as it:
ƒ helps to improve the timeliness and accuracy of case
detection and notification
ƒ enables
rapid case investigation
, including collection
of laboratory specimens
ƒ helps to link cases epidemiologically.
ƒ enables timely action to be taken in response
to the detected case
ƒ identifies areas where passive surveillance needs to be strengthened.
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