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SummaryHealthy persons were shown to possess circulating antibodies of both IgA, IgG and IgM isotype directed against the bacteria of their faecal microflora, assessed by immunomorphometry. After removal, by absorption, of the fraction of antibodies directed against the autochthonous faecal bacteria or cross-reacting with allogenous faecal bacteria, there were still antibodies left directed against allogenous faecal bacteria of both the IgA, IgG and IgM isotype. However, relatively more antibodies of the IgA isotype appeared to be directed against allogenous bacteria than against indigenous faecal bacteria. Persons who reacted with specific antibodies to many bacteria of their own flora also tended to react specifically to bacteria in the allogenous microflora of the other volunteers. The patterns of antibodies directed to faecal bacteria of different morphologies (morphotypes) were unique for each individual.

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A pat ient wit h coronary art ery steal phenomenon through an anastomosis from t he right coronary artery to t he right bronchial artery . caused by a coarctation of the aorta, is reported. Th e angina was cc mptetetv relieved e tt er surgical ligat ion of t he anastomot ic vessel and repair of the coarctation.The literature has bee n reviewed . and t he present case appears to be the fir st wi t h symptomatic steal phenomenon in con nect ion wi th coarctat ion of the aorta.

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