Question

Question 9 Four different clinical isolates of the Gram-positive bacterium, Staphylococcus aureus, are tested for their abilities to resist innate immune defense mechanisms. For these experiments, each bacterial strain is first grown in culture to achieve log-phase replication, and then cultures are supplemented with dilutions of human serum containing normal serum proteins as well as antibodies capable of binding to S. aureus. One hour later, the cultures are analyzed and the numbers of live bacteria are quantitated. The data from this experiment are shown in Figure Q9. Figure Q9 From these data, what general conclusions can be reached about the four strains of S. aureus?

          Question 9

Four different clinical isolates of the Gram-positive bacterium, Staphylococcus aureus, are tested for their abilities to resist innate immune defense mechanisms. For these experiments, each bacterial strain is first grown in culture to achieve log-phase replication, and then cultures are supplemented with dilutions of human serum containing normal serum proteins as well as antibodies capable of binding to S. aureus. One hour later, the cultures are analyzed and the numbers of live bacteria are quantitated. The data from this experiment are shown in Figure Q9.

Figure Q9

From these data, what general conclusions can be reached about the four strains of S. aureus?

Question 9

Four different clinical isolates of the Gram-positive bacterium, Staphylococcus aureus, are tested for their abilities to resist innate immune defense mechanisms. For these experiments, each bacterial strain is first grown in culture to achieve log-phase replication, and then cultures are supplemented with dilutions of human serum containing normal serum proteins as well as antibodies capable of binding to S. aureus. One hour later, the cultures are analyzed and the numbers of live bacteria are quantitated. The data from this experiment are shown in Figure Q9.

Figure Q9

From these data, what general conclusions can be reached about the four strains of S. aureus?

Added by William G.

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