Case-control investigation of invasive Salmonella disease in Malawi reveals no evidence of environmental or animal transmission of invasive strains, and supports human to human transmission.

Koolman L, Prakash R, Diness Y, Msefula C, Nyirenda TS, Olgemoeller F, Wigley P, Perez-Sepulveda B, Hinton JCD, Owen SV, Feasey NA, Ashton PM, Gordon MA,

Malawi Liverpool Wellcome Programme