The role of gastric acid inhibitors as predisposing factors for Candida eso
phagitis is unknown. A retrospective case-control study of esophageal candi
diasis was conducted in human immunodeficiency virus (HIV)-negative patient
s diagnosed from January 1991 to December 1997. The diagnosis of esophageal
candidiasis was always made on the basis of endoscopic and histological cr
iteria. Fifty-one patients were diagnosed with esophageal candidiasis, 15 o
f whom had esophageal complaints and 48 of whom suffered from another previ
ous chronic disease (17 had cancer). In addition, 20 patients had previousl
y been treated with antibiotics, 13 with steroids and 14 with omeprazole. I
n the multivariate analysis, neoplasm (odds ratio, 5.50; 95% confidence int
erval, 1.94-15.56) and therapy with antibiotics (odds ratio, 11.97; 95% con
fidence interval, 3.82-37.45), steroids (odds ratio, 35.52; 95% confidence
interval, 3.90-324.01) or omeprazole (odds ratio, 18.23; 95% confidence int
erval, 4.67-71.03) were all associated with esophageal candidiasis. These d
ata suggest that Candida esophagitis tends to occur in patients with chroni
c diseases, most of whom have been previously treated with antibiotics, ste
roids or omeprazole. The findings support the hypothesis that treatment wit
h omeprazole favors the development of esophageal candidiasis.