“…As a rule, during the initial stage of joint involvement effusion is too scanty to be aspirated, and even if aspiration is possible culture remains negative for Neisseria go norrhoeae; blood cultures, however, are pos itive in this period. After the 4th day the si tuation changes and blood cultures are nega tive while joint aspirates can become posi tive [11], Should synovial effusion therefore in general be examined for Neisseria gonor rhoeae as well as genital discharge and blood as it is often recommended [1,14]? The an swer has to be based on the probability of positive results, which amounts, as table I shows, to no more than about 30%.…”