Received: 5 December 2017
Accepted: 30 October 2018
First Online: 14 November 2018
Ethics approval and consent to participate
: This study was approved by Kenya Medical Research Institute (KEMRI) Scientific Steering Committee and assigned SSC No. 1320. Since we used archived isolates to carry out the study we therefore did not have to seek consent from the participants.
: Not applicable.
: The authors declare that they have no competing interests.
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