Citrobacter are straight, facultative anaerobic gram-negative, non-sporing rods, motile by means of peritrichous flagella. They belong to family Enterobacteriaceae. The genus now consists of 13 genomospecies separable by DNA hybridisation including Citrobacter amalonaticus, Citrobacter braakii, Citrobacter diversus, Citrobacter farmeri, Citrobacter freundii, Citrobacter gillenii, Citrobacter koseri, Citrobacter murliniae, Citrobacter pasteurii, Citrobacter rodentium, Citrobacter sedlakii, Citrobacter werkmanii, Citrobacter youngae). Out of these the most commonly isolated bacteria from human specimens are Citrobacter freundii and Citrobacter koseri. C. koseri has been associated with cases of neonatal meningitis and brain abscess and C. freundii with gastroenteritis, neonatal meningitis, and septicemia. C. braakii, one of the rarely isolated species is seen to be associated with bacteremia. In this case report, we depict a presentation in which C. braakii is isolated from necrosed bone of a diabetic foot.
Keywords: Citrobacter braakii, Necrosed bone, Diabetes.
