Invasive salmonella infections among children from Rural Mozambique, 2001-2014

Inácio Mandomando, Quique Bassat, Betuel Sigaúque, Sérgio Massora, Llorenç Quintó, Sozinho Ácacio, Tacilta Nhampossa, Delfino Vubil, Marcelino Garrine, Eusébio Macete, Pedro Aide, Charfudin Sacoor, Silvia Herrera-León, Joaquim Ruiz, Sharon M. Tennant, Clara Menéndez, Pedro L. Alonso

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Background. Invasive nontyphoidal Salmonella (iNTS) has emerged as a cause of bacteremia in African children and HIV-infected adults, which is associated with high mortality. Epidemiological data and burden of iNTS infections in resource-constrained settings are needed to better define preventive and curative strategies. Methods. Blood and, if appropriate, cerebrospinal fluid, were collected from children <15 years of age with fever or severe disease admitted to the Manhiça District Hospital and cultured for NTS; isolates were then characterized. Results. From January 2001 to December 2014, 41 668 of the 51 878 admitted children had a blood culture performed. Invasive NTS was isolated from 670 (1.6%) specimens collected from 41 668 patients; 69 (10.3% died). Salmonella enterica subspecies enterica serovar Typhi or Salmonella enterica subspecies enterica serovar Paratyphi A or C were only isolated in 14 (0.03%) patients. A total of 460 of 620 (74.2%) NTS isolates serotyped were Salmonella enterica subspecies enterica serovar Typhimurium (45% [116/258] of which were multilocus sequence type 313). The incidence of iNTS was 61.8 (95% confidence interval, 55.4-68.9) cases per 100 000 child-years, being highest among infants (217.7 cases/100 000 child-years). The incidence of iNTS declined significantly (P <. 0001) over time, but the case fatality ratio remained constant at approximately 10%. Antimicrobial resistance of iNTS against most available antimicrobials has steadily increased, with a predominance of multidrug-resistant strains. Conclusions. The decreasing but still high incidence of iNTS, its high associated case fatality ratio, and the common detection of multidrug-resistant strains call for a need to improve treatment and prevention strategies for iNTS.

Original languageEnglish
Pages (from-to)S339-S345
JournalClinical Infectious Diseases
Volume61
DOIs
StatePublished - 1 Nov 2015

Keywords

  • Salmonella
  • bacteremia
  • burden of disease
  • incidence
  • invasive nontyphoidal Salmonella

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