Quinine Sulfate Inhibits Invasion of Salmonella typhimurium and Shigella flexneri: A Preliminary Study
Open Access
- 8 March 2006
- journal article
- Published by Oxford University Press (OUP) in Journal of Travel Medicine
- Vol. 12 (6), 343-346
- https://doi.org/10.2310/7060.2005.12608
Abstract
The incidence of typhoid fever and shigellosis parallels that of malaria, so many individuals who are on antimalarial drugs can be found in areas where these diseases are widespread. We investigated the effect of quinine sulfate on the growth and invasion of Salmonella typhimurium and Shigella flexneri M90T to determine whether people on antimalarials can have secondary gain from some protection against typhoid fever and shigellosis. The effect of 50 and 100 μM quinine sulfate on the invasive ability of Salmonella typhimurium and Shigella flexneri M90T into human colon adenocarcinoma-2 (Caco-2) cells was studied during the infection period. The invasive efficiency was expressed as the number of viable internalized bacteria by counting the colony-forming units. The invasive ability of Salmonella typhimurium and Shigella flexneri M90T was significantly inhibited by 50 and 100 μM quinine sulfate in a dose-dependent manner (for Salmonella typhimurium) when the drug was added to Caco-2 cell monolayers during the infection period. Since so many people who are on antimalarial drugs visit and inhabit areas that are endemic to typhoid fever and Shigella infection, a study on the influence of these drugs on the disease is long overdue. Our data indicate that quinine sulfate interferes with the invasion and internalization of Salmonella typhimurium and Shigella flexneri M90T into host cells. Further studies on additional strains/serotypes with other newer antimalarials at various concentrations are needed to verify this effect of quinine sulfate and to draw conclusions on its significance in vivo.Keywords
This publication has 34 references indexed in Scilit:
- The global distribution of clinical episodes of Plasmodium falciparum malariaNature, 2005
- Preventing malaria in UK travellersBMJ, 2004
- The global distribution and population at risk of malaria: past, present, and futureThe Lancet Infectious Diseases, 2004
- MalariaCMAJ : Canadian Medical Association Journal, 2004
- THE USE OF ANTI-MALARIAL DRUGS TO PREVENT MALARIA IN THE POPULATION OF MALARIA-ENDEMIC AREASThe American Journal of Tropical Medicine and Hygiene, 2004
- Short communication: Prevalence of typhoid fever in febrile patients with symptoms clinically compatible with typhoid fever in CameroonTropical Medicine & International Health, 2003
- Changes in public health in South Africa from 1876.Perspectives in Public Health, 2001
- An update on concurrent malaria and typhoid fever in CameroonTransactions of the Royal Society of Tropical Medicine and Hygiene, 1999
- Clinical epidemiology of paediatric disease at Nchelenge, north-east Zambia.Paediatrics and International Child Health, 1998
- Summary of an International Workshop on Typhoid FeverClinical Infectious Diseases, 1986