PT - JOURNAL ARTICLE AU - Labbé, M AU - Delamare, N AU - Pepersack, F AU - Crokaert, F AU - Yourassowsky, E TI - Detection of Bacteroides fragilis and Bacteroides melaninogenicus by direct immunofluorescence. AID - 10.1136/jcp.33.12.1189 DP - 1980 Dec 01 TA - Journal of Clinical Pathology PG - 1189--1192 VI - 33 IP - 12 4099 - http://jcp.bmj.com/content/33/12/1189.short 4100 - http://jcp.bmj.com/content/33/12/1189.full SO - J Clin Pathol1980 Dec 01; 33 AB - A new diagnostic kit, which contains a polyvalent antiserum for either Bacteroides fragilis or Bacteroides melaninogenicus, was tested for reliability and specificity on 146 clinical samples of different origin. A correlation between the culture and immunofluorescence was observed for B. fragilis in 87.39% of cases and for B. melaninogenicus in 81.48% of cases. When pure cultures were tested, aerobically as well as anaerobically, false-positive reactions were observed with staphylococci and Clostridium ramosum spores. The well-defined morphology of these bacteria and spores allows for the elimination of any diagnostic error. The method is rapid, and the margin for error is limited. The test gives a semiquantitative idea of the number of bacteroides organisms present in the clinical specimens even in the presence of a mixed flora.