Abstract：
BACKGROUND AND AIM:Oxalobacter formigenes is an intestinal bacterium that utilizes oxalate as the only source of energy. It has been suggested that the lack of colonization with this organism may be a risk factor for calcium oxalate urolithiasis. Because this problem was not investigated in pediatric stone formers, we decided to assess it in our patients. METHODS:The presence of O. formigenes in stool samples of 76 children and adolescents (aged 4.1-18 years) with idiopathic calcium urolithiasis (36 with chemically confirmed calcium oxalate stones and 40 children with a strong clinical suspicion of this type of urolithiasis) was assessed using PCR method. Simultaneously, urinary oxalate excretion was measured in this group. Fifty healthy, age- and sex-matched subjects served as controls. RESULTS:O. formigenes was found in 21/76 patients (27.6%). In controls, frequency of colonization was similar (26%). The median 24h urinary oxalate excretion in patients colonized with O. formigenes was significantly lower in comparison with non-colonized patients, 0.319 (range 0.141-0.546) and 0.437 (range 0.198-0.967) mmol/1.73 m(2)/24h, respectively. CONCLUSIONS:Higher urinary oxalate excretion in children with calcium urolithiasis may be a result of the absence of O. formigenes. The reasons for similarly low intestinal colonization with this bacterium in normal subjects and stone formers remain speculative. Thus, further studies are necessary to clarify this issue.
journal_name
Arch Med Resjournal_title
Archives of medical researchauthors
Sikora P,Niedźwiadek J,Mazur E,Paluch-Oleś J,Zajaczkowska M,Kozioł-Montewka Mdoi
10.1016/j.arcmed.2009.05.004subject
Has Abstractpub_date
2009-07-01 00:00:00pages
369-73issue
5eissn
0188-4409issn
1873-5487pii
S0188-4409(09)00085-Xjournal_volume
40pub_type
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