Bacterial contamination of the small bowel evaluated by breath tests, 75Se-labelled homocholic-tauro acid, and scanning electron microscopy.

Abstract:

:Eighty-one patients with diarrhoea due to suspected bacterial contamination of the small intestine were investigated with the bile acid breath test (BABT) and 75Se-labelled homocholic-tauro acid (SeHCAT). The impact of bile acid malabsorption due to dysfunction of the terminal ileum on BABT was evaluated. The group of patients with abnormal BABT, notably the 6-h accumulated value, showed a high frequency of reduced SeHCAT values (p less than 0.01), indicating that a reliable test for bile acid malabsorption is indispensable for interpreting the BABT in the investigation of small-intestinal bacterial overgrowth. The results of the 14C-D-xylose breath test were compared with the outcome of the combined SeHCAT-BABT in 44 patients. In contrast to previous findings no correlation between the two breath tests was found. On the contrary, a significant negative correlation was encountered (p less than 0.01) for patients in whom either breath test was abnormal. Scanning electron microscopy for demonstration of adherent microorganisms was included in the investigations. No correlations were found with the outcomes of the different breath tests. The effect of antibiotic treatment was evaluated with regard to symptoms and breath tests. The results of the investigation indicate that different tests are needed for the diagnosis of bacterial overgrowth of the small intestine, because of the different metabolic characteristics of the contaminating bacteria.

journal_name

Scand J Gastroenterol

authors

Suhr O,Danielsson A,Hörstedt P,Stenling R

doi

10.3109/00365529008999224

subject

Has Abstract

pub_date

1990-08-01 00:00:00

pages

841-52

issue

8

eissn

0036-5521

issn

1502-7708

journal_volume

25

pub_type

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