INTRODUCTION:
Epidemiological surveillance is defined as a systematic and
continuous collection, analysis and interpretation of animal
health data and associated factors aiming at the disease control
of animal disease diseases.
Epidemio surveillance is an
important tool for generating information useful for developing
animal disease control strategies and evaluating disease control
measures.
It is important to note that animal diseases important
in one country may not be important in other countries as a
result Epidemio – Surveillance Systems (ESS) differ in
objectives and methodology from one country to another.
The most
important requirement of the ESS is its capacity to provide
accurate animal health data/information.
A functional ESS is characterized by rapid detection and
intervention of disease outbreaks.
Therefore it is very
important to monitor the network to ensure that its capacity to
carry out its activities is not compromised by any factor.
For
this reason it is very important to ensure that performance
indicators of the ESS are known to participating agents so that
to stimulate their maximum commitment.
When some indicators do not reach the required threshold
(satisfactory level) other activities of the ESS may be
affected. The solution is to study step by step what could
contribute to a change of the threshold.
It is for this reasons
that we need to understand PI of ESS.
The understanding the PI
of ESS will help to notice its deterioration and institution of
corrective measures to address the poor performance. Generally
speaking, these indicators are parameters that provide assurance
that:
· Case/ outbreaks are detected in a timely manner (Sensitivity)
· Case/ outbreaks are investigated in a timely manner
(timelines)
· Case/ outbreaks are confirmed accurately (Specificity)
In Jan 2003 Pakistan declared herself provisionally freedom from
Rinderpest. The next stage is to provide verifiable evidence of
absence of Rinderpest disease and ultimately Rinderpest
infection in Pakistan.
To attain this status Pakistan will be
required to apply to OIE for recognition from freedom from
Rinderpest.
All application for freedom from diseases (TADs i.e.
Rinderpest, Foot and Mouth Disease (FMD), contagious Bovine
Pleuro pneumonia must be supported by documentary and
scientifically based surveillance data indicating freedom from
disease or infection.
The proof of freedom from disease or infection is possible when
effective animal disease surveillance and reporting system exist
in the country making application. Hence, it is important for
the Veterinary Authorities to conduct regular self-assessment of
the ESS to ensure that standards are maintained. The findings of
PDS teams in different provinces have gathered very good
information on Transboundry Animal Diseases (TADs) that is going
to be very useful in the application for freedom from Rinderpest.
This presentation provide elementary guidelines to stimulate the
assessment of the ESS in Pakistan in terms of capacity to
detect, report, confirm and control animal disease outbreaks.
Performance indicators of
ESS
The
performance indicators of ESS are grouped into three groups
shown hereunder:
a) At
National level:
|
Areas for assessment |
Indicators |
1 |
Presence
of a logical and adequate structure with clear reporting
channels within and between the three major components of
the ESS
i. Federal Epidemiology Unit.
ii. National Veterinary Lab. System
iii. Field component
|
Functional
Epidemiology Unit, which coordinates collection, storage,
analysis and dissemination of animal health information.
i.Defined reporting and animal health information flow.
ii.Active animal disease reporting.
iii.Passive animal health reporting.
iv.Local and international animal health reports.
v.Animal disease investigation reports.
vi.Lab reports (Samples tested, Disease survey results.
vii.Geographical coverage of ESS.
viii.Training on animal disease recognition and reporting (at all
levels of ESS)
ix.Feedback to all stakeholders of the ESS.
|
2. |
Objectives
of ESS
|
List of priority diseases.
ii.Strategies to Control priority disease.
iii.Surveillance protocols for priority diseases
-
In
domestic animals.
-
In
wildlife
iv. Routine animal disease surveys (Prepared jointly with
National Laboratory systems e.g. Brucellosis, TB etc)
v.Detected/diagnosed priority disease (Mapping of distribution
of diseases).
|
3
|
Functional
infrastructure for delivery of animal health services
|
Inventory of functional infrastructure delivering veterinary
services (Veterinary hospitals, Animal Disease Investigation
Centers etc).
ii.Inventory of personnel in the ESS (Strength of the ESS).
iii.Private Veterinary practices integration in ESS.
iv.Functional Veterinary check points/ Border post/Zoo sanitary
check points/Mobile teams.
|
4
|
Coverage
of the ESS
|
Availability and accessibility of Animal Health Services
(Government Veterinary service)
ii.Distribution of Private veterinary services; Number of
Private veterinary services integrated in the ESS.
iii.Communication: Capacity to report animal disease
iv.Data on spatial distribution of animal disease.
v.Number of animal health reports from the smallest units of
the ESS.
vi.Active PDS teams.
|
5
|
Technical
support to field teams
|
Training on basic epidemiology and disease control.
ii.Availability of animal disease reporting forms/ formats.
iii.Sampling equipment available to surveillance units / posts.
|
6
|
Data
collection, analysis and interpretation
|
Number of reports received from the field.
ii.Number of reports received from the National Veterinary
Laboratory System.
iii.Monthly animal health summary reports produced and
disseminated to stakeholders.
iv.Reports submitted to DVS
v.Reports submitted to OIE
vi.Reports submitted to SAARC
|
b) Indicators for National Veterinary Laboratory Systems (NVLS)
|
Areas for assessment |
Indicators |
1 |
National Veterinary
Laboratory System NVLS.
|
Means to perform diagnosis of animal diseases under
surveillance (infrastructure, equipments, diagnostic kits
and reagents) – priority diseases)
ii.Sufficient trained personnel
iii.Lab manuals available or developed.
iv.Modern diagnostic test available (Including molecular
diagnostic techniques – e.g. PCR at NVL.
v.Basic diagnostic tests at
Disease
Investigation Centers
and Animal hospitals.
vi.Diagnostic summaries from NVL and Veterinary hospital,
(Inferences made).
|
2 |
Training
of Laboratory technicians.
|
·Refresher trainings of lab staff.
·Number of veterinary technicians trained in diagnostic
techniques of priority diseases.
|
3 |
Samples
received, tested / analyzed.
|
.Number of Samples received per years.
ii.Animal disease surveys carried out in a year.
iii.Number of samples referred to regional or international
reference laboratories.
iv.Analysis or summary result submitted to the Epidemiology
Unit.
v.Interpretation of analysis of lab findings
|
c) Field
level indicators of ESS
|
Areas for assessment |
Indicators |
1 |
Field
staff familiar with the disease control strategy including
surveillance protocols.
|
Continuous training of field staff on animal disease
control.
ii.Implementation of animal disease control / surveillance
protocols for priority diseases.
iii.Number and quality of reports submitted by field staff.
|
2 |
Field
staff are trained:
·Recognition of priority diseases
·Animal health data collection, recording and transmission.
|
.Training sessions of field staff in animal disease
recognition, reporting and sample collection.
ii.Number of training session conducted and number of field
staff and Private Veterinarians trained.
iii.Manuals, hand outs or posters on recognition of important
animal disease.
|
3 |
Report
submission to Provincial Epidemiology Unit.
|
Number of report submitted.
ii.Number of samples collected and submitted to Veterinary
hospital, NVL.
|
4 |
Materials
for data recording, storing and submission.
|
Availability of animal disease reporting forms.
ii.Number of reports coming from the field.
iii.Training.
|
Courtesy:
Pakissan
|
Pakissan.com;
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