FIG. 2. Hemolysis of Wagatsuma blood agar by extracts
of nutrient agar (3% NaCI) cultured with
Kanagawa-positive (K+) and -negative (K-) strains
of Vibrio paraheemolyticus. Upper left, strain no. 8
(K+); lower left, no. 12 (K+); upper left, strain no. 8
(K+); lower left, no. 12 (K+); upper right, no. 51
(K-); and lower right, no. 68 (K-). The dark zone
around the cylinder is clear hemolysis with distinct
margin; the outer zone is hazy hemolysis without
distinct margin. The white zone at center indicates
precipitate produced by extracts of nutrient agar
culture.