A Prospective Study of First Attacks of Inflammatory Bowel Disease and Non-Relapsing Colitis: Microbiologic Findings

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Abstract
In 105 patients with a first attack of colitis, thorough microbiologic investigations of rectal biopsy, faecal, and serum samples were performed with the aims of identifying the colitis-causing agents and shedding light on factors that may precipitate or aggravate the onset of inflammatory bowel disease. Sixty-one patients were found to have inflammatory bowel disease. In 13 (21%) of these patients microbial findings were positive. Eight of the 61 patients fell ill during or immediately after antibiotic treatment, and 10 while travelling abroad. Forty-one of the 105 patients had non-relapsing colitis. In 32 (78%) of these the microbial findings were positive. Six of these 41 patients fell ill during or immediately after antibiotic treatment, and 14 while travelling abroad. Alteration of the intestinal microflora on travelling, gastrointestinal infection, or treatment with antibiotics seems to precipitate or aggravate the symptoms in latent inflammatory bowel disease. In such patients the mode of onset is often changed from insidious to more acute, which may cause difficulty in differentiation from non-relapsing colitis.