High levels of imported asymptomatic malaria but limited local transmission in KwaZulu-Natal, a South African malaria-endemic province nearing malaria elimination

Raman, Jaishree; Gast, Laura; Balawanth, Ryleen; Tessema, Sofonias; Brooke, Basil; Maharaj, Rajendra; Munhenga, Givemore; Tshikae, Power; Lakan, Vishan; Mwamba, Tshiama; Makowa, Hazel; Sangweni, Lindi; Mkhabela, Moses; Zondo, Nompumelelo; Mohulatsi, Ernest; Nyawo, Zuziwe; Ngxongo, Sifiso; Msimang, Sipho; Dagata, Nicole; Greenhouse, Bryan; Birkholtz, Lyn-Marie; Shirreff, George; Graffy, Rebecca; Qwabe, Bheki; Moonasar, Devanand

doi:10.1186/s12936-020-03227-3

Table 4 Assessment of insecticide residual efficacy in selected households from study localities that had IRS in the past 6 months using cone bioassays with insecticide-sensitive laboratory-bred Anopheles arabiensis mosquitoes

From: High levels of imported asymptomatic malaria but limited local transmission in KwaZulu-Natal, a South African malaria-endemic province nearing malaria elimination

Municipality	Locality	Date of last IRS round	Surface type	Insecticide used	% Mortality after 24 h^a
Municipality	Locality	Date of last IRS round	Surface type	Insecticide used	Top^b	Middle^b	Bottom^b
UMhlabuyalingana	Makanis	2017 Oct 19	Cement	DDT	100	100	60
uMhlabuyalingana	Makanis	2017 Oct 19	Painted	DDT	100	100	100
uMhlabuyalingana	Manguzi	2017 Oct 19	Painted	Deltamethrin	100	90	90
uMhlabuyalingana	Manguzi	2017 Oct 19	Painted	Deltamethrin	100	80	100
uMhlabuyalingana	Manguzi	2017 Oct 18	Painted	Deltamethrin	100	100	100
uMhlabuyalingana	Mshudu	2017 Nov 1	Cement	DDT	100	100	90
uMhlabuyalingana	Muzi	2017 Dec 5	Painted	Deltamethrin	100	70	100
uMhlabuyalingana	Muzi	2017 Dec 5	Cement	DDT	100	100	80
uMhlabuyalingana	Muzi	2018 Jan 15	Painted	DDT	100	100	100
uMhlabuyalingana	Muzi	2018 Jan 15	Painted	Deltamethrin	100	100	100
uMhlabuyalingana	Muzi	2018 Jan 15	Painted	Deltamethrin	100	100	90
Jozini	Ndumo	2017 Oct 4	Mud	DDT	100	100	100
Jozini	Ndumo	2017 Oct 4	Cement	DDT	100	100	100
Jozini	Ndumo	2017 Oct 4	Painted	Deltamethrin	100	100	100
Jozini	Ndumo	2017 Oct 4	Cement	DDT	100	100	100
Jozini	Ndumo	2017 Nov 14	Painted	DDT	93	100	94
Jozini	Ndumo	2017 Nov 14	Cement	DDT	100	100	100
Jozini	Ndumo	2017 Dec 20	Painted	Deltamethrin	100	100	100
Jozini	Ndumo	2017 Dec 20	Plastered	DDT	100	100	92
Jozini	Ndumo	2017 Dec 21	Painted	Deltamethrin	100	100	85
Jozini	Ndumo	2017 Dec 20	Cement	DDT	100	100	100
uMhlabuyalingana	Ngutshana	2017 Jan 20	Painted	Deltamethrin	60	50	90
Jozini	Shemula	2018 Jan 30	Painted	Deltamethrin	100	100	100
uMhlabuyalingana	Sihangwani	2017 Sep 20	Plastered	DDT	60	40	90
uMhlabuyalingana	Sihangwani	2017 Sep 20	Painted	Deltamethrin	100	70	60
uMhlabuyalingana	Sihangwani	2017 Sep 20	Plastered	DDT	100	90	100
uMhlabuyalingana	Tetepan	2017 Nov 3	Cement	Deltamethrin	100	100	100
uMhlabuyalingana	Tetepan	2017 Nov 3	Cement	Deltamethrin	90	100	100
uMhlabuyalingana	Tetepan	2017 Nov 3	Cement	Deltamethrin	100	100	100
uMhlabuyalingana	Tetepan	2017 Nov 3	Cement	Deltamethrin	100	100	100

^aA control was included in each experiment, with 100% survival reported
^bCones were place at three points on the wall surface of each selected homestead, the top, middle and bottom, to assess spray-quality across the entire wall surface

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ISSN: 1475-2875

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