Background of Malaria Case Based Surveillance in Tanzania

1. Introduction to malaria Case Based
Surveillance (mCBS)
December 2020
Kilimanjaro, Arusha and Manyara

2. Presentation Outline
• Introduction
• Rationale
• mCBS Meaning
• Objectives

3. Introduction
• Tanzania is among the ten plus one countries grouped as a high
malaria burden country
• Malaria transmission in Tanzania is highly heterogenous, that is, some
regions and districts have high number of malaria cases compered to
other areas.
• Due to this variations, stratification of malaria transmission in
Tanzania was conducted, regions and councils were grouped intro fou
strata (malaria transmission risk). These include
• Very low risk – Targeted for malaria elimination
• Low risk- continue with Burden reduction
• Moderate risk - continue with Burden reduction
• High risk- continue with Burden reduction
• Malaria elimination in very low risk will be achieved through
introduction of Malaria case based surveillance (mCBS)

4. Rationale
• WHO recommends high malaria burden countries with
heterogeneous transmission to start implementing
malaria elimination in areas with very low malaria
transmission
– “Irrespective of where countries are on the path to
elimination, surveillance of malaria should be
upgraded to a core intervention in national and
subnational malaria strategies.”
– Strengthening surveillance systems employs a case
based surveillance approach with active case
detection and follow-up

5. 2018 & 2020 regional MACRO-stratification
2018 2020
Stratum Epi strata Epi + non epi strata
2018 2020 2018 2020
Very Low 3 5 3 5
Low 6 4 5 3
Moderate 6 10 6 10
High 11 7 11 7
Urban 0 0 1 1
Total 26 26 26 26

6. Malaria Case Based Surveillance (mCBS)
• mCBS is the systematic classification and investigation of
malaria cases and transmission foci that enables
– Identify locally acquired infection
–Active transmission in areas where malaria risk is
very low
–Interrupt malaria transmission
• It determine whether an infection was acquired locally
and the likely location of infection
• End up with the identification of transmission foci and its
control

7. Tested
Not tested
Probable/Clinical
Malaria
Negative
No Malaria
Positive
Confirmed
Malaria
Asymptomatic
Malaria Case
Active Surveillance

8. Number of malaria cases by Region - 2019

9. Average cases per Health Facility per month

10. Number (Left) and Proportion (Right) of HF by malaria monthly case
burden average, January 2018-June 2019
• More than half of all health facilities in each CBS implementing
region has malaria caseload of less than one case per facility per
month.

11. Objectives of mCBS
The objective of malaria case based surveillance is to
strengthening malaria surveillance through; -
 Proper malaria case detection, classification and
notification
 Introduction of active surveillance
 Identification of localized foci of malaria transmission and
the related investigation and classification.
 Identify malaria hotspots in order to develop an
appropriate response plan to interrupt transmission in
very low transmission areas targeted for local elimination

12. Activities Implemented
• MCBS protocol development
• RHMT and CHMT orientation on baseline data collection
• Actual field malaria baseline data collection
• mCBS data cleaning
• Baseline data entry, analysis and report writing
• Dissemination of Baseline data findings to RHMT and
CHMT

13. THANK YOU
END