Susceptibility to typhoid fever is associated with a polymorphism in the cystic fibrosis transmembrane conductance regulator (CFTR).
The cystic fibrosis transmembrane conductance regulator (CFTR) is the affected protein in cystic fibrosis (CF). The high rate of CF carriers has led to speculation that there must be, similar to the sickle cell haemoglobin advantage in malaria, a selective advantage for heterozygotes. Such a selective advantage may be conferred through reduced attachment of Salmonella typhi to intestinal mucosa, thus providing resistance to typhoid fever. We tested this hypothesis by genotyping patients and controls in a typhoid endemic area in Indonesia for two highly polymorphic markers in CFTR and the most common CF mutation. We found an association between genotypes in CFTR and susceptibility to typhoid fever (OR=2.6). These analyses suggest that the role CFTR plays in vitro in S. typhi infection is also important for infection in the human population.
van de Vosse
Esther
E
Department of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands. E.van_de_Vosse@LUMC.nl
Ali
Soegianto
S
de Visser
Adriëtte W
AW
Surjadi
Charles
C
Widjaja
Suwandhi
S
Vollaard
Albert M
AM
van Dissel
Jaap T
JT
D019005:Cystic Fibrosis Transmembrane Conductance Regulator / Q000235:genetics*; D020022:Genetic Predisposition to Disease; D006801:Humans; D011110:Polymorphism, Genetic; D014435:Typhoid Fever / Q000235:genetics*
D019005:Cystic Fibrosis Transmembrane Conductance Regulator