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The relationship between invasive nontyphoidal salmonella disease, other bacterial bloodstream infections, and malaria in Sub-Saharan Africa

Abstract:

Background. Country-specific studies in Africa have indicated that Plasmodium falciparum is associated with invasive nontyphoidal Salmonella (iNTS) disease. We conducted a multicenter study in 13 sites in Burkina Faso, Ethiopia, Ghana, Guinea-Bissau, Kenya, Madagascar, Senegal, South Africa, Sudan, and Tanzania to investigate the relationship between the occurrence of iNTS disease, other systemic bacterial infections, and malaria.

Methods. Febrile patients received a blood culture and a malaria test. Isolated bacteria underwent antimicrobial susceptibility testing, and the association between iNTS disease and malaria was assessed.

Results. A positive correlation between frequency proportions of malaria and iNTS was observed (P = .01; r = 0.70). Areas with higher burden of malaria exhibited higher odds of iNTS disease compared to other bacterial infections (odds ratio [OR], 4.89; 95% CI, 1.61–14.90; P = .005) than areas with lower malaria burden. Malaria parasite positivity was associated with iNTS disease (OR, 2.44; P = .031) and gram-positive bacteremias, particularly Staphylococcus aureus , exhibited a high proportion of coinfection with Plasmodium malaria. Salmonella Typhimurium and Salmonella Enteritidis were the predominant NTS serovars (53/73; 73%). Both moderate (OR, 6.05; P = .0001) and severe (OR, 14.62; P < .0001) anemia were associated with iNTS disease.

Conclusions. A positive correlation between iNTS disease and malaria endemicity, and the association between Plasmodium parasite positivity and iNTS disease across sub-Saharan Africa, indicates the necessity to consider iNTS as a major cause of febrile illness in malaria-holoendemic areas. Prevention of iNTS disease through iNTS vaccines for areas of high malaria endemicity, targeting high-risk groups for Plasmodium parasitic infection, should be considered.

Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1093/cid/civ893

Authors


More from this funder
Funder identifier:
https://ror.org/029chgv08
Funding agency for:
Baker, S
Grant:
100087/Z/12/Z
More from this funder
Funder identifier:
https://ror.org/0456r8d26
Grant:
OPPGH5231


Publisher:
Oxford University Press
Journal:
Clinical Infectious Diseases More from this journal
Volume:
62
Issue:
S1
Pages:
S23-S31
Publication date:
2016-03-01
DOI:
EISSN:
1537-6591
ISSN:
1058-4838


Language:
English
Keywords:
Pubs id:
pubs:609117
UUID:
uuid:e8f9ed49-21f1-452c-8a60-5ad67dc750f3
Local pid:
pubs:609117
Source identifiers:
609117
Deposit date:
2016-06-28
ARK identifier:

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