Skip to main content

Table 1 Donor malaria prevalence and contribution to donor pool at district level

From: Automated measurement of malaria parasitaemia among asymptomatic blood donors in Malawi using the Sysmex XN-31 analyser: could such data be used to complement national malaria surveillance in real time?

Weather zone

Administrative district (region)#

Donor parasitaemia prevalence

Proportion of donor pool*

Northern

Rumphi (N)

17.0% (15/88)

1.7%

Mzimba (N)

4.5% (14/311)

6.1%

Chitipa (N)

3.3% (1/30)

0.6%

Karonga (N)

No data

0%

ALL

7.0% (30/429)

8.4%

Central

Dowa (C)

--- (6/14)

0.3%

Kasungu (C)

32.2% (29/90)

1.8%

Lilongwe (urban) (C)

7.4% (63/857)

16.8%

Lilongwe (non-urban) (C)

25.9% (178/686)

13.5%

Mchinji (C)

28.1% (16/57)

1.1%

Ntchisi (C)

No data

0%

ALL

17.1% (292/1704)

33.5%

Lakeshore

Likoma* (N)

No data

0%

Mangochi (S)

20.0% (42/210)

4.1%

Nkhotakota (C)

36.6% (30/82)

1.6%

Nkhata Bay (N)

--- (9/25)

0.5%

Salima (C)

38.0% (27/71)

1.4%

ALL

27.8% (108/388)

7.6%

Shire valley

Balaka (S)

5.7% (2/35)

0.7%

Chikwawa (S)

--- (3/14)

0.3%

Chiradzulu (S)

--- (0/8)

0.2%

Mulanje (S)

13.7% (7/51)

1.0%

Mwanza (S)

11.8% (40/338)

6.6%

Phalombe (S)

--- (2/4)

0.1%

ALL

12.0% (54/450)

8.9%

Southern highlands

Blantyre (urban) (S)

3.5% (44/1246)

24.5%

Blantyre (non-urban) (S)

33.0% (32/96)

1.9%

Dedza (C)

--- (9/23)

0.5%

Machinga (S)

--- (0/1)

0.02%

Neno (S)

7.5% (16/212)

4.2%

Nsanje (S)

--- (0/2)

0.04%

Ntcheu (C)

5.7% (5/87)

1.7%

Thyolo (S)

0.9% (2/234)

4.6%

Zomba (S)

10.0% (22/219)

4.3%

ALL

6.1% (130/2120)

41.6%

  1. *“Proportion of donor pool” refers to the number of blood donor study samples collected in a particular district, expressed as a percentage of the total number of donor samples included in the study
  2. #The contribution to the donor pool by administrative region is as follows: Northern (N) 9%, Central (C) 39%, Southern (S) 52%
  3. *Due to inaccessibility, Likoma Island is not an MBTS blood collection site
  4. ---Sample size too small (< 30) for reliable prevalence rate calculation